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List of the Best Software Testing Service Companies

  • UpDoer Technology

    An Independent Software Testing Service Agency
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    UpDoer is an independent software testing and QA company and has established with the aim to deliver high-quality products according to the current market trends with the help of complete software testing/QA process. "We believe in work" and not just talking about work. We follow the best Quality Assurance pr ... read more about UpDoer Technology

    "UpDoer Team always keen to do whatever it takes to meet the requirement."
    Richard Alberg
    < $25/hr
    10 - 49
    2017
    India
  • pwrteams

    Scale your enterprise with cross-border teams
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    We provide IT staff augmentation services to our clients through our service centers in Poland, Lithuania, Serbia, Estonia, and Ukraine. We carefully select the best people to match your IT needs, language requirements, and company culture. Our experts work directly with your team and we take care of all supportin ... read more about pwrteams

    "Teammanager Hardware & Panel building"
    Guillaume Hallaert, Teammanager Hardware & Panel building at Agidens Infra Automation
    $25 - $49/hr
    250 - 999
    2008
    Luxembourg, Poland
  • The company’s mission is to help global organizations overcome technology challenges of Digital Transformation with the focus on new and emerging technologies, which we believe should make a positive impact on each area of our lives, making it simpler, smarter, and opening new promising horizons. Delivering in ... read more about DigiPrima Technologies Pvt. Ltd.

    "E-commerce Website Design and Development for Affordable Uniforms Online Store"
    Charls Smith, IT Manager at Affordable Uniforms Online
    < $25/hr
    10 - 49
    2016
    India
  • QATestLab

    QA services | Web & Mobile testing
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    Hello! Thank you for the visiting our profile. QATestLab is an independent provider of QA (Quality Assurance) and software testing services. Located in Ukraine with Head Office in Kyiv, we provide services worldwide with clients at 5 continents. As a pure-play testing provider, we believe quality and success go hand ... read more about QATestLab

    "Testing services of game product"
    Veronika Vereshchak, Content, SMM, Digital Marketing at
    < $25/hr
    50 - 249
    2005
    Ukraine
  • TestFort

    QA/Manual/Automated Testing ✅ISO certified ✅ISQTB
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    TestFort is an award-winning team offering transparent and flexible software testing and QA services. The company was created in 2001 and has grown tremendously ever since. TestFort engineers have proven their expertise with ISTQB and IBM certifications and performed 300+ projects for both startups and worldwide corpor ... read more about TestFort

    "Software Testing Services For A Project Management & Task Tracking Tool"
    Alex Gostev 🇺🇦🇳🇴
    $25 - $49/hr
    50 - 249
    2001
    United States, Ukraine
  • Founded by a real QA tester BespokeQA has dealt with testing, structuring, creating solutions for more than twenty-five clients across ten industries for last more than one year. Our mission is to help clients make distinctive, lasting and substantial improvements in their business and to continue building a great comp ... read more about BespokeQA

    "Amazing company"
    Vansh Tangri, Medical Director at Whanau Ora Clinics
    < $25/hr
    2 - 9
    2019
    India
  • Fleek IT Solutions

    Cost-effective Software Testing Services
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    Fleek IT Solutions is one of the best top rated software testing companies. We are engaged in providing cost-effective testing services to help you avail quality assurance services. We have been in this business for years of time and have adapted to the latest technologies to serve you better all the time. We ... read more about Fleek IT Solutions

    "Web & Mobile App Testing for Photography Agency"
    Tanya Gupta
    < $25/hr
    50 - 249
    2016
    India, Netherlands
  • Kavichki

    Software Testing and Quality Assurance
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    We specialize exclusively in independent software QA and testing services. But our task is not limited to finding defects and preventing them. Our goal is much broader — to help you create a quality product and make sure that the functionality will profit for your business. Since 2010 our team has successfully ... read more about Kavichki

    "Software testing for a full-service digital agency"
    Viktoria Burakova
    < $25/hr
    10 - 49
    2010
    Russia
  • QA Supermarket

    Quick as automated testing, Clever as a human
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    QAsupermarket is a place where you can get your software tested by professionals with the maximum automation of processes and with the minimum time and money expenses. QAsupermarket will cover all test types you need on any platforms you need. Professional tools such as Online Bug Tracking System and easy-to-use ... read more about QA Supermarket

    "Great quality of work"
    Grégoire Piette
    NA
    2 - 9
    United States
  • Newwave Solutions Jsc

    Expert Software & Blockchain Development
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    Over the past 11 years, we have continuously improved our services and currently have 2 branches in Japan and Vietnam. Our custom software development company is operated by a strong team of 300 (and growing yearly) employees dedicated to providing efficient solutions for our customers' needs.We not only provide su ... read more about Newwave Solutions Jsc

    "They provides amazing, top-notch, caring and on top of that, professional customer services. "
    NGUYEN VU GIANG, Teacher at Phenikaa University
    < $25/hr
    250 - 999
    2011
    Vietnam, Japan
  • Outpost QA

    Your QA software test team in Mexico
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    We are a nearshore boutique Quality Assurance firm that focuses on helping your products reach your customers with maximum quality. Unlike other outsourcing companies, our testers integrate very tightly with your team, helping your developers reach their goals. Our rates are lower than hiring in the United Stat ... read more about Outpost QA

    "They are flexible and adapt quickly"
    Anonymous
    $25 - $49/hr
    10 - 49
    2020
    Mexico
  • QA Testing.io

    Ensure Quality with our Tailored QA Solutions
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    At QA Testing.io, we are dedicated to providing top-notch software quality assurance services to ensure your product is reliable, efficient, and user-friendly. Our team of experienced QA professionals uses the latest testing methodologies and tools to ensure maximum coverage and minimal risk. We understand the importan ... read more about QA Testing.io

    "We appreciate QA Testing.io for their exceptional results, expertise, professionalism, and commitment to delivering quality services our project"
    Zaynab Tucker, Chief Executive at Nitro League
    $25 - $49/hr
    10 - 49
    2019
    United States
  • Powercode

    Software Development Advice and Assistance
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    Powercode is an innovative web and mobile application development company. Our goal is to stay on top of the rapidly changing tech trends and deliver up-to-date software solutions for our client's ideas. Сompany team includes over 100 engineers with deep expertise in more than 25 advanced and trusted programmin ... read more about Powercode

    "Mobile application development"
    Tetyana Ulyanova, Business Development Manager at at ScorpionTC
    $25 - $49/hr
    50 - 249
    2015
    Ukraine, United Kingdom
  • Kualitatem Inc. is an independent Software Testing Company, Information Systems Security and Auditing Company providing services to a global clientele. 

    "Best tools, better team and wonderful results "
    Alex Jones, Health IT Consultant at Software Finder
    < $25/hr
    50 - 249
    United States
  • VisionQA Services

    Helping people to get top notched quality products
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    VisionQA is the global leader in next-generation software testing and QA Consulting. We help SMEs and Fortune 500 companies to deliver digital transformation and technology services, enabling global 50+ clients to stay one step ahead of disruption. For over 5 years we have been providing independent software QA and ... read more about VisionQA Services

    "Knowledgeable, reliable and skilled!"
    Christina Lehn
    < $25/hr
    10 - 49
    2020
    India
  • Vyshnavi Information Technologies India Private Limited (VIT) is a global Information Technology Company established in the year 2001 with headquarters in Bangalore, having development centers in Bangalore, Pune, US and Canada. Our range of services includes Design, Development and Testing of software components for Pr ... read more about Vyshnavi Information Technologies (India) Pvt. Ltd

    "Highly recommend VIT for your engineering services"
    Lotika Gulvadi, Director of Customer Operations at Rally.org (Formerly Piryx, Inc.)
    $25 - $49/hr
    250 - 999
    2001
    India, United States
  • AwsQuality

    A Salesforce Development & Consulting Company
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    AwsQuality is a Salesforce CRM practice solutions and implementation provider having highly skilled and competent salesforce certified developers. We’ve worked with customers from various industries as their trusted partners assisting them with architecture, design, development and managing wide range of solution ... read more about AwsQuality

    "Satisfied with the work done by them for our project!"
    Julio Quaglia, CEO at Valuenet
    < $25/hr
    10 - 49
    2014
    India, United States
  • HQSoftware

    IoT, AR, VR, and custom software development
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    HQSoftware is a trusted international custom software developer that brings Digital Transformation into your business. We specialize in IoT, Big Data, AI, Machine Learning, AR and VR solutions, web and mobile application development, and provide dedicated development teams to help you evolve. We deliver all-around serv ... read more about HQSoftware

    "A reliable partner for mobile & web development"
    Philipp Grasmug, CTO & Co-Founder at Reactive Reality
    $25 - $49/hr
    50 - 249
    2001
    United States, Georgia
  • 9YARDS IT TECHNOLOGY PRIVATE LIMITED

    Leading Software Development & Testing Company
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    9Yards Technology is a preeminent IT service provider rendering top-notch IT services worldwide. Since our inception, we have successfully served 500+ global clients as their strategic technology partners, including numerous Fortune 500 companies, tech giants, and a multitude of progressive startups. Our efficacious en ... read more about 9YARDS IT TECHNOLOGY PRIVATE LIMITED

    "Experts in the field of QA. Best outsourcing team to work"
    RP Singh, Sr. Business Manager at Mobilecoderz
    < $25/hr
    50 - 249
    2020
    India
  • “Plugging productivity” is what MDS thrives on. As a global IT consulting and software services company, we focus on developing software solutions and products which could scale, perform, and exceed customer’s expectations. Incepted in 2007, we are an offshore software development ISO 9001:2008 Cer ... read more about MetaDesign Solutions

    "Professional and responsive company which I have ever come across."
    PRAKASH CHANDRA, Project Manager at Vidvocal
    $50 - $99/hr
    250 - 999
    2007
    India, Australia
  • KMS Solutions

    Embrace the Digital Enterprise
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    Part of the KMS group, KMS Solutions is a technology consulting firm with a mission to empower digital enterprises and help them operate more effectively by leveraging software engineering excellence, digital capabilities, specialized accelerators, and fit-for-purpose solutions alongside strategic software partners. ... read more about KMS Solutions

    "We need a tool to help us gain better insights into how users engage with our digtal product. KMS Solutions recommended a product analytics solution t"
    Thuan Do, Teacher Manager at Schola
    NA
    250 - 999
    2011
    Vietnam, United States
  • Altamira

    Custom Software Solutions since 2009
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    Creating Digital Products on a Global Scale  End-to-end digital product development, from business research and validation to full-cycle management and product launch. Sustain the top business level with our self-sustainable infrastructure and delivery centers  Altamira team builds digital products and ... read more about Altamira

    "They work hard to solve problems and don't let you down."
    David Paice, Director at at includmi
    $50 - $99/hr
    50 - 249
    2009
    United States, Slovakia
  • Agilites

    Outsourcing Software Development | Ukraine
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    Agilites offers software development and testing outsourcing services in the form of building dedicated teams of Web/Mobile Developers, QA engineers, PMs, and other IT experts who create and ensure the quality of software products for companies in different industries. We also provide independent testing and QA of soft ... read more about Agilites

    "Trustworthy & flexible team."
    Anonymous, VP of Client Relations at Health & Wellness Firm
    $25 - $49/hr
    50 - 249
    2012
    Ukraine
  • All that we do is to deliver happy experiences for our clients and team with our quality Software Testing services. 16 years in business, 1600 successful projects, 400 customers and a team of 200 good people. We have built our legacy on the foundation of positive experiences and customer satisfaction. So much so that n ... read more about Crestech Software Systems Pvt.Ltd.

    "CresTech is a excellent software testing company."
    sangram singh chauhan, Digital Marketing Specialist at 'confidential'
    $25 - $49/hr
    250 - 999
    2005
    India
  • SOASTA, Inc.

    Load Testing and Performance Monitoring
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    In the hyper-competitive online marketplace, providing a better customer experience is the only way to win. It’s a world where milliseconds can add up to millions – and one where performance is everything. But optimizing customer experience goes way beyond measuring speed and engagement.SOASTA gives you a c ... read more about SOASTA, Inc.

    < $25/hr
    250 - 999
    2006
    United States
  • QA Consultants

    North America's largest software testing company
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    QA Consultants helps companies across North America protect their reputations for building innovative software products and running reliable systems. QA Consultants accomplishes this by conducting comprehensive quality assurance (QA) software testing. QA Consultants is chosen by quality professionals, prod ... read more about QA Consultants

    $50 - $99/hr
    250 - 999
    1994
    Canada
  • Pegasie Technologies

    Load TestingandSoftware Quality Assurance Services
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    Pegasie offers on site and remote services in Software Quality Assurance and Performance Testing. We have built a wide range of expertise on different systems, applications, platforms and networks throughout the years and count over 140 customers in different industry verticals. We offer a wide variety of services incl ... read more about Pegasie Technologies

    $100 - $149/hr
    50 - 249
    2002
    Canada
  • TestingXperts

    Next Gen Specialist QA & Software Testing Company
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    TestingXperts is a Next-Gen QA & Software Testing Services provider, co-headquartered in London, UK and Harrisburg, PA in the USA, with offices in the Netherlands, USA, Singapore and offshore test labs in India. TestingXperts’ comprehensive suite of testing services covers Test Advisory, Functional and Non-Fu ... read more about TestingXperts

    NA
    1,000 - 9,999
    2013
    United States, United Kingdom
  • Spiral QA

    Full suite of software testing solutions
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    Spiral QA gives companies the software testing and quality assurance support they need to create better, more user-friendly web and mobile applications. For over 9 years, our dedicated team of software testers and quality assurance specialists at Spiral QA has been helping businesses build confidence in their products, ... read more about Spiral QA

    "Web Application Testing Partnership "
    Bogdan Nechaev, Chief Knowledge Officer at IM Action
    $25 - $49/hr
    10 - 49
    2011
    United States, Belarus
  • StrongBox IT Private Limited

    CyberSecurity, VAPT, Performance, Automation
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    StrongBox IT, a global  cybersecurity and information security services company specializing in Vulnerability assessments, penetration testing, security audits and compliance audiit requirements. StrongBox IT, through their VAPT services, including network and applocation security testing, has helped leading ... read more about StrongBox IT Private Limited

    "Strongbox has been a great long term security partner for us"
    Aaditya S, Building product at at RevenueHero
    < $25/hr
    10 - 49
    2017
    India
  • test IO

    Fast QA Testing as a Service
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    test IO helps software teams ship high quality software faster. As a global leader in software crowdtesting, we enable fast moving software development teams with a platform for on-demand QA testing throughout the entire development cycle. Test setup takes just minutes, and we dynamically allocate human testers in r ... read more about test IO

    "Excellent team. Value for money!"
    Nick woods
    $50 - $99/hr
    10 - 49
    2011
    United States, Germany
  • iBeta Quality Assurance

    Outsourced, Independent Software QA since 1999
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    Headquartered in Denver, Colorado, iBeta Quality Assurance has been providing critical software testing services for the world’s most trusted brands since 1999. Our full range of on-demand QA software testing services encompasses many different software testing types including functionality testing, mobile testin ... read more about iBeta Quality Assurance

    "Excellent QA Experience"
    Kevin Chan
    $50 - $99/hr
    50 - 249
    1999
    United States
  • Merged Minds

    Professionals with young hearts and open minds
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    Merged Minds is a software testing service provider, focusing on supporting projects quality assurance using manual and automated test tools. Our experience goes way back to 2006 with the Merged Minds brand founded in 2017.  We have experience testing web, desktop and mobile applications made for multiple in ... read more about Merged Minds

    "Excellent team work"
    Clarence Jacobson, Test Manager - Contractor at Freelancer
    < $25/hr
    2 - 9
    2017
    United Kingdom, Romania
  • Mindful QA

    American Software Testing Company - 10% to Charity
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    Award-winning American software testing company with a mission to do good. From donating 10% of profits to charity to being the first carbon neutral QA company, Mindful QA is proud to fuel progress while improving usability for millions of users. Mindful QA has been featured on over a dozen "best software testing ... read more about Mindful QA

    "Skilled, Experienced, and Easy to Work With!"
    Jeff Broussard, CTO at at Wonderwall Consulting
    $50 - $99/hr
    50 - 249
    2018
    United States
  • KualitySoft

    Your Business Deserve KualitySoftwares.
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    As an Independent Software Testing & QA Services Partner Company providing QA testing services for any software product. If your software works on Web, Mobile, or on a handheld device, We can test it. Doing Business with us is Easy. We measure up to your expectations. We design, develop and deploy end-to-end soluti ... read more about KualitySoft

    "They measure up to our expectations. Feeling really Confident with KualitySoft Product and Quality Assurance Services. "
    Mr Chaudhry, Director at Chaudhry Family Hospital
    NA
    10 - 49
    2017
    Pakistan
  • Inoxoft

    IEC/ISO 27001, Google, Microsoft Certified Company
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    Inoxoft is a custom software development company that gets to realize clients’ business ideas and deliver cutting-edge solutions for several industries including Healthcare, Fintech, Education, Logistics, and Real Estate. Engineers at Inoxoft ensure, develop and share expertise in: Flutter (Cross-platfor ... read more about Inoxoft

    "Their involvement and dedication from the very beginning are very impressed us"
    Brian Stallings, Founder at Real Estate No Brokers
    $25 - $49/hr
    50 - 249
    2014
    Ukraine
  • TechAvidus

    Building Custom Software, web and mobile solutions
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    TechAvidus is Top Rated Custom Software development & Digital Marketing agency, with a focus on Web Development, Mobile App development, custom software development, and digital marketing services (SEO, PPC, and Social Media Marketing). Our relentless focus on our clients has led us to over 150 5-star reviews si ... read more about TechAvidus

    "Very responsive and friendly team!"
    Alexander Z Stanley
    < $25/hr
    50 - 249
    2016
    India, United States
  • Lansoft

    Full-scale product development from idea to market
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    Lansoft helps companies around the world launch and operate digital products, build and raise brand awareness through adaptive approach and seamless integration into their current workflow. Over 11 years we develop services & apps that transform business: ERP and CRM systems, Business- and Enterprise ... read more about Lansoft

    "A team of professionals"
    Katsiaryna Danilchyk, Founder at at KD-Advisory
    $25 - $49/hr
    50 - 249
    2011
    Belarus
  • TopSquad

    Your business, our development force
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    At TopSquad, we specialize in delivering IT solutions and services that are customized to the unique needs of established companies seeking to achieve further business growth. Our team possesses extensive knowledge of modern technologies, transparent processes, and in-depth expertise across various business domains. We ... read more about TopSquad

    "TopSquad helped us implementing a marketing automation system"
    Hiro Takeda
    < $25/hr
    50 - 249
    2008
    Vietnam
  • TestDel has developed its services for companies wishing to outsource all or a portion of their software quality activities so they may gain testing efficiencies and reduce administrative burdens associated with in-house QA teams. An established and trusted brand with a global presence and network. TestDel delivers Ons ... read more about Testdel UK LTd.

    "Health Care Industry "
    Lisa Barnett
    NA
    50 - 249
    2016
    United Kingdom, India
  • Civenty

    High-end IT project | Extended teams
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    Covent IT Group carries the spirit and atmosphere of a startup and cherishes customers of all sizes.We are a high-quality provider of IT business solutions for clients all over the world, uniting together 300+ professionals with profound experience in various domains.We have vast experience with small, medium and globa ... read more about Civenty

    "Cooperated one year"
    Nikita
    $25 - $49/hr
    10 - 49
    2015
    Ukraine
  • At Iterators LLC we provide top quality software and mobile testing services. Discover our competitive advantage and let us put it to work for you. Other Company Profiles: Google+ Instagram Pinterest Youtube Channel MySpace SoundCloud Tumblr

    "Hydrow Rowing Machine"
    Jill Willcox
    < $25/hr
    2 - 9
    United States
  • Tesvan

    Manual and Automation QA Outsourcing Services
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    Hello! You are welcome to the Tesvan world. A Company of Quality We provide QA Automation and Manual Outsoursing and Outstaffing Services. We are a team of engineers, who has a passion to test high-load, modern web apps. ✔️ Establish clear expectations of the scope and timing of all testing deliverables wi ... read more about Tesvan

    "Excellent"
    Nina Antonyan
    $25 - $49/hr
    10 - 49
    2019
    Armenia
  • Sapizon Technologies is a leading IT Services & Solutions company, rendering digital transformation to business organizations at a global scale. We started in 2015 to enhance the business world and help our client progress in their respective domains. We are actively providing services all around the globe in count ... read more about Sapizon Technologies

    "Best Application Development Team"
    Ashok Kumar
    < $25/hr
    10 - 49
    2015
    India
  • thinkTribe

    Together for better digital journeys
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    Established in 2003, SciVisum has grown to become a significant player in the UK Web Performance Monitoring and Testing market. Bridging the gap between business and technology teams by providing a common language, in depth analysis, expert monitoring, intuitive reporting, and comprehensive client support, our portfoli ... read more about thinkTribe

    < $25/hr
    10 - 49
    2003
    United Kingdom
  • QTeam Software Solutions

    We are creating bespoke software solutions
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    Our purpose is to deliver complex digital solutions in web related industries like e-learning, e-commerce and social media marketing.

    "Reliable and experienced partners "
    Alexandru Gheorghe, Marketing Manager at Luxoft Training Europe
    $50 - $99/hr
    2 - 9
    2016
    Romania, United Kingdom
  • SoftEthica

    We enable the power of Cloud technologies
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    Cloud & DevOps as a service We enable the power of Artificial Intelligence & Cloud technologies, accelerating smart Companies. Service powered by professional ethics.   Why you need the DevOps: 01 - Native Cloud Applications Development Your Company can significantly decrease the time-to-mar ... read more about SoftEthica

    "Mobile App Development "
    Tommaso Bagon
    $25 - $49/hr
    2 - 9
    2019
    United States, Ukraine
  • Trigent Software, Inc

    Custom Software Development Company
    Visit website

    Trigent, founded in 1995, is an early pioneer in IT services and a leading software services company. We believe in partnering with clients across their value chain, assisting them to design, build, deliver, and maintain their products and services that make them the best in their industry. We enable our clients t ... read more about Trigent Software, Inc

    "Excellent engagement and integration with our company. Delivered great value in speeding up an ailing rule engine project of ours."
    Praseed Thapparambil
    $25 - $49/hr
    250 - 999
    1995
    United States
  • Rocketlab is a Swiss-based company that provide experienced software test engineers to small to medium sized businesses within Switzerland, Germany and Europe. Headquartered in Tallinn (Estonia) - known as the most advanced technology spot in Europe, and Zurich (Switzerland) around 100 outstanding and experienced te ... read more about Rocketlab

    "Excellent QA partner for various projects"
    Peter Hans Baumann
    $50 - $99/hr
    50 - 249
    1994
    Switzerland, Estonia

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What is Software Testing?

The software testing definition connotes the process of verifying whether the final software solution resembles the anticipated outcomes. Software testing assists in distinguishing bugs/errors or gaps in the coding as well as any conflict in the set of requirements provided by the client. Moreover, the software testing services also warrant that the software system is error-free.

How Does Software Testing Benefit Businesses?

Software testing is extremely beneficial for the successful deployment of software. The following are the most vital advantages of performing software testing:

1. Saves Money:

Some businesses believe investing in software testing is costlier. However, it saves a substantial amount for the business in the long run. Deploying faulty software will cost you and your clients a lot of money. An undetected bug during the later stages of the development process is ideally more difficult and expensive to resolve. An undetected bug during the later stages of the development process is ideally more difficult and expensive to resolve.

2. Prevents Calamities:

Defects in software designed for emergency purposes or having crucial functions such as emergency alerts or monetary transactions can have disastrous effects. Communication breakdown, loss of data, or system blackouts can lead to complete system failure. Software testing solutions resolve these issues in the initial development phase, which helps businesses avoid catastrophes.

3. Builds Reputation:

An error-free software will gain more praise from its clients and users. Clients are more likely to trust a business that delivers bug-free software. This can only be achieved with the assistance of top software testing service companies. Moreover, automated software testing can also help build long-term relationships with the clientele while boosting revenue.

4. Offers Customer Satisfaction:

As mentioned above, clients rely more on companies that offer problem-free software. Simultaneously, software that has a smooth operation and does not glitch provides unmatched client satisfaction. Moreover, for any company, delivering exceptional user experience is crucial as that can make or break the product.

5. Easy Integration:

The software may not necessarily work independently. Software testing techniques can come in handy in such situations in ensuring that the software seamlessly integrates with any existing program. Automated software testing can also provide detailed analysis regarding the performance of all active systems.

Which Are the Different Software Testing Methodologies?

Software Testing Methodology is the strategy implemented to deliver a product that meets the client's expectations. The testing methodology defines the objective of the test, its strategies, and its deliverables. The testing models are somewhat similar to software development structures.

The most popular testing methodologies are the Waterfall Model, Iterative development, and Agile methodology.

1. Waterfall Model 

The waterfall testing model progresses sequentially, similar to the software development phase. Each phase commences only once the previous phase is finished.

This software testing model is very simple to design and handle. The testing requirements are clearly outlined beforehand, allowing easy testing of each system segment. However, since each phase can only begin once the previous stage is cleared, it makes it difficult for the model to accommodate unplanned events.

2. Iterative Model

In iterative software development, a larger project is subdivided into smaller parts, which are subjected to numerous iterations of the waterfall methodology. The complete system undergoes testing, with the completion of an iteration. The feedback generated from testing is subsequently incorporated into the next cycle.

The chief benefit of iterative development is that the reports from each cycle of the tests are used in the next cycle, enhancing the testing process. There is a drawback, however, as this methodology increases communication overheads.

3. Agile Methodology

In Agile methodology, the software is created in incremental, rapid cycles. Similarly, Agile testing analyses the codes after every cycle. This warrants that every bug is fixed before the next release.

This testing procedure is ideal for projects that require frequent changes or moderation. Although for the success of this testing methodology, it is crucial that there is a constant interaction between the software testers, developers, and clients.

What Are the 6 Stages of Software Testing Life cycle?

Software Testing Life Cycle (STLC)refers to the various phases of the software testing procedure. Software testing is a very significant stage in the software development life cycle (SDLC) which determines the quality of the end product. During the development stage of SDLC, the software testers analyze and establish the scope of testing. This is essential as it significantly reduces the software test cycle time. Post-testing stage, the software is then fixed for bugs and ready for deployment.

1. Requirement Analysis:

Requirement Analysis is the primary step of the Software Testing Life Cycle (STLC). This phase concentrates on understanding the requirement bar set by the client. The quality assurance team coordinates these details with the stakeholders to better assess which systems are to be tested. This stage is executed in parallel with the Requirement gathering phase of SDLC. 

2. Test Planning:

Test Planning, as the name suggests, is crucial for formulating all testing plans. The software testers estimate the effort and cost invested in testing the project. The software test plans also classify the metrics, thereby outlining the course to gather and track those metrics.

3. Test Designing:

The next phase is test designing or test case development. In this, the software testers transcribe multiple detailed test cases. The testing team analyzes and prepares the required test data and breaks it down into numerous sub-tests to improve coverage. This step also determines the test exit criteria, highlighting when to conclude the testing.

4. Test Environment Setup:

Quality analysts set up a test environment to duplicate the end-users work conditions. The test environment setup includes installing a database server, front-end operating environment, client operating system, etc. Since this stage performs independently, software testing teams can establish a testing environment simultaneously with the test design phase. 

5. Test Execution:

Once the testing team formulates the test designs and sets up the test environment, test execution is launched at full speed. This phase ensures that the testing module's entry criteria are met and that each output is documented appropriately. The tests are repeated sequentially until every bug and system error is resolved.  

6. Test Closure:

This is the final stage of the software testing life cycle, which concludes the process of testing. This phase is essential since it ensures that all the open severity defects are tackled, and all the test cases are executed deliberately. The test matrices, final test reports, test closure reports, etc., are deliverables after this point.

What Are the Types of Software Testing?

There are two chief software testing types:

  • Functional Testing
  • Non-Functional Testing

1. Functional Testing:

Functional Testing authenticates the software system against operational requirements as well as specifications. The main goal of functional Testing is to verify the critical operations of the system, its basic usability, and accessibility while checking for error conditions.

The four main Functional Testing categories are as follows: 

1. Unit Testing: Unit Testing focuses on individual components of the software to ensure that the system functions as expected—unit tests aid software testers in fixing bugs and defects in the earlier stages of the development cycle. Hence, coders can make changes in the codes as required. 

Unit testing can be automated as well as performed manually. The testers can isolate groups of code and test them rigorously. This helps in identifying unnecessary dependencies amongst the codes which should be eliminated. A vital benefit of unit testing is that it authorizes programmers to restructure existing codes to ensure the module functions flawlessly. 

2. Integration Testing: Integration testing logically assembles software modules in a group and tests them. This allows testing service providers to identify and resolve bugs hindering communication between the different software modules. Integration testing also covers the impromptu changes made in the software, which might not have been unit tested.

Integration Testing can be executed via the Big Bang or Incremental approaches. This testing procedure mainly concentrates on the data flow between segments of software. For instance, when a user enters their login credentials and clicks on the login button, they must be directed to the software's main page. To ensure this, integration testing analyzes the interface link between the login and home pages.

3. System TestingSystem testing validates the complete application. It ensures that the end-to-end functioning of the system meets the quality standards set by the client. System testing is generally performed by independent software testers who haven't contributed to the development of the software in any way. This ensures that the results and reports delivered are accurate and unbiased.

Automated software testing also studies the result of every input in the system to ensure that desired outputs are achieved. Moreover, it also tests the experience of the users. Besides the business requirements, system testing also validates the application's architecture.

4. Acceptance TestingAcceptance testing, also known as User Acceptance Testing (UAT), is performed to assess whether the system is ready for deployment. Clients or end-users do these tests to ensure the integrity of the application. During software development, there are chances that specific user requirements may not be adequately communicated to the developers. This may result in the development of a highly different system from what the user requested.

Acceptance testing implements the following steps.

  • Analysis of Client Requirements
  • Distinguish Test Scenarios
  • Formulating UAT Test Plans
  • Run Test Cases
  • Record Results
  • Confirm Objectives

Once this testing procedure is completed and the system passes the tests, the program is moved to production.

2. Non-Functional Testing:

Non-Functional Testing verifies the non-operational aspects of a software application, such as performance, usability, reliability, etc. It is intended to assess the readiness of the software that is not tackled by Functional Testing.

For example, Non-functional Testing checks the number of people who can simultaneously log in to an application.

The key objectives of Non-functional Testing are:

  • Increase usability, maintainability, efficiency, and other criteria of the product.
  • Decrease production risk and cost.
  • Optimize product installation.
  • Accumulate metrics for internal R&D.

The following are the different software testing types of Non-functional testing modules:

1. Installation: Installation testing detects and resolves any error that may occur during software installation.
2. Localization: Software testing companies assess the software for it to work according to the culture and setting of the deployment location.
3. Performance: As the name suggests, performance testing is done to warrant the smooth working of the software.
4. Recovery: Software testing companies must ensure that after any sudden crash in the system, it must be easily recoverable. This is analyzed during Recovery Testing.
5. Reliability: Reliability testing checks the extent of the software system to which it can continuously perform specific tasks without hindrance.
6. Security: This parameter defines how software is safeguarded against sudden or deliberate attacks from either internal or external sources. 
7. Stress: Stress testing studies the limit of the software with an increased workload to which it can operate without lagging.
8. Usability: This ensures that the user can learn, operate, and communicate with the system effortlessly.
9. Volume: The software testing service providers maintain the system's capacity to handle massive data without affecting its response time.

Apart from the above-mentioned, testing service companies also offer Automation testing, Compatibility testing, Compliance testing, Load testing, etc.

Businesses can also opt for additional software testing tools to improve the implemented software testing techniques. Some popular software testing tools are A/B testing software, QA testing software, Beta testing software, etc.

GoodFirms Research Process

Testing is a highly crucial part of the software development process. However, an even more important task is selecting the ideal partner from all the available software testing service companies. GoodFirms focuses on highlighting the top software testing companies after analyzing them based on an extensive research methodology.

The researchers at GoodFirms have ranked these testing companies after studying their merits across numerous qualitative and quantitative determinants. These software application testing companies have bagged a position in the above list due to their outstanding software testing services and expertise in testing support. Furthermore, GoodFirms acknowledges their contribution to the market and the years they have been in the testing industry. Our team of experts also calculates the feedback and reviews these testing companies have received from their prior clients to assess their reliability further.

We strive to bring the best software testing service providers into the spotlight by marking them in every performance aspect. This allows service seekers to discover and hire the best software application testing company for their products. The above-listed testing service companies have worked for small-scale, mid-scale, and large-scale enterprises. They have a team of software testers with years of experience providing top software quality assurance services. 

As a dedicated research and review platform, getting listed with us helps businesses gain a standing in the industry while building a reputation amongst their clients and competitors. GoodFirms encourages all new and established software testing companies to participate in future research processes by submitting proof of their work and getting listed in our 'Research' division.