Overview

About Capital Numbers

We build, modernize, and scale award-winning digital solutions across Web, Mobile, Cloud, AI/GenAI, Data & Emerging Technologies.

BSE-Listed • 1000+ Experts • 50+ Technologies • 250+ Global Clients • 50+ Awards • ISO 27001 & SOC II Certified

Global Track Record: Trusted by Cinepolis, Consumer Reports, BD, BASF, DPD, Savills, Veolia and many more.

What We Do

AI & Data
GenAI (RAG, AI Agents, Copilots), LLM Engineering, Intelligent Automation, Data Platforms & Analytics

Digital Engineering
Custom Software, SaaS Platforms, Web & Mobile Apps, Legacy Modernization

Cloud & DevOps
Cloud Migration, Multi-Cloud Architecture, CI/CD, High Availability & Disaster Recovery

Experience & Quality
UI/UX Design, Product Design, Automated & Manual Testing

How We Work

  • Agile Development Pods — Cross-functional teams aligned to your goals
  • Dedicated Teams — Scalable, seamless extension of your in-house team
  • Fixed Scope Projects — Clear deliverables, timelines, and predictable costs

Why Capital Numbers

  • AI-first mindset embedded across all solutions
  • Deep engineering expertise in modern tech stacks
  • Rapid team scaling with uncompromising quality
  • Proven delivery for both startups and large enterprises

Let’s Connect
Email: [email protected]
Same-day response for qualified inquiries!

What clients say

Review Analytics of Capital Numbers

Every review is verified through Goodfirms before it's published.

4.855 Verified Reviews
Quality4.8
Schedule & Timing4.8
Communication4.8
Overall4.8
Review Summary
Summarized from 55 verified reviews · Updated August 2026
Capital Numbers earns consistent praise for reliable, timely project delivery and strong technical expertise across web development and complex programming work. Clients highlight excellent communication, responsive support, and attentive project management as key strengths. The team is noted for professionalism, affordability, and genuine care in producing quality results that meet client needs. Multiple reviewers describe them as dependable partners easy to work with over extended engagements.
✦ AI-generated summary. May not reflect every review.
Detailed Reviews of Capital Numbers
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What reviewers mention most

Maruf Aminu
Maruf Aminu, FounderVerified Review
Posted on Apr 7, 2025

I am happy to have chosen Capital Numbers due to their professionalism, openness and commitment.

Overall rating5.0
Quality5.0
Communication4.0
Schedule & Timing5.0
Software DevelopmentTesting Services

I have worked with Capital Numbers for some months. In these few months, I have been happy to have received support from them on my project. They bring to the table openness, realism, empathy, professionalism, and dedication! I look forward to a long journey of working with Capital Numbers on my projects.

Erik Andersson
Erik Andersson, Business developer at Palett AIVerified Review
Posted on Mar 12, 2025

They were really professional and we'll definitely consider them again for future projects.

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web DevelopmentSoftware Development

They work with great talent and really deliver on what they promise. We've had good experiences with multiple developers we've worked with from capital numbers and think they do an excellent job of supporting their talent.

Devul Nahar
Devul Nahar, Cognautica at CognauticaVerified Review
Posted on Mar 4, 2025

Really professional. On time.

Overall rating4.0
Quality4.0
Communication4.0
Schedule & Timing4.0
Software Development

Really good talent, good management, very accommodating to unique needs and circumstances. My favorite things was their professionalism. The management team especially has gold communication.

Antoine Borg
Antoine Borg, Owner at House of DarmeniaVerified Review
Posted on Mar 3, 2025

Smooth with top-notch customer care

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

The team is as professional as can be. From conception to delivery, they were always courteous and ready to listen to my needs. They adapted as the project evolved and I always felt they were ready to accommodate me and my requests. I have never experienced a development project as smooth as this before. Well done guys!

Anonymous
AnonymousVerified Review
Posted on Feb 25, 2025

Good experience

Overall rating5.0
Quality5.0
Communication4.0
Schedule & Timing4.0
Web Development

Reasonable cost and experience project manager to manage the communication and projects. I enjoyed working with them as they are careful with the project and they would rectify if any miscommunication arise

Anonymous
AnonymousVerified Review
Posted on Jun 19, 2024

They have built a great website for us.

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

My experience was great. Their team went above and beyond to ensure I was happy. They did many things outside of scope to help with our site. I highly recommend them.

Mustafa  Tubaileh
Mustafa Tubaileh, Head of tech at Global Ventures at Global VenturesVerified Review
Posted on Apr 24, 2024

Efficient

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

The engagement is really good knowing that we had urgent updates on the website with tight deadline and the team was really helpful and fast.

Stephen Lindsey
Stephen Lindsey, Founder at music.guide corp. / indexter corp. at Indexter Corp.Verified Review
Posted on Feb 26, 2024

Site development kickoff with excellent deliverables

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web DevelopmentWeb Design

The project was tackled by a team of very experienced professionals. Deliverables exceeded expectations. Looking forward to continuing the development process with Capital Numbers as our full stack developer.

YEVHENIIA SHUKAN
YEVHENIIA SHUKAN, GREAT INVESTMENT ASSETS AG at GREAT INVESTMENT ASSETS AGVerified Review
Posted on Nov 1, 2023

Capital Numbers - a reliable partner and assistant

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web DevelopmentWeb Design

Our start-up project. We held a tender to select a developer to solve three problems: website, client portal, integration with CRM. At all stages of the tender, the primacy of the Capital Numbers team was felt. By the total number of votes of our team, it was decided to work together with Capital Numbers. All communications took place quickly and efficiently from the moment the tender was completed until the end of work on the joint project.

Mohammad Al Sharif
Mohammad Al Sharif, vibes4usVerified Review
Posted on Sep 28, 2023

devloping a web app

Overall rating4.0
Quality4.0
Communication4.0
Schedule & Timing4.0
Web Development

Every time I gave the team comments on the project, there was extremely good cooperation from everyone. They genuinely care about working together, and they make every effort to offer their best services in a timely manner.

Nami Ayoub
Nami Ayoub, Senior Business Development Manager at AmazonVerified Review
Posted on Mar 29, 2023

Professional Team, always open to feedback. Delivering high quality projects at time.

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Overall, experience has been excellent. We have not finished the project yet. But the Capital Numbers team has been very collaborative, open for feedback, and always delivers high quality designs at time.

Arnold Amrhein
Arnold Amrhein, Junior Partner at CREO CapitalVerified Review
Posted on Nov 1, 2022

Great understanding of project scope with great output for value

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Great experience overall, from the initial design of the project scope, CN perfectly understood the development we intended and executed it in a promptly manner with great communication.

Mohammed Nawaf Alotaibi
Mohammed Nawaf Alotaibi, CEO at Wapel SoftwareVerified Review
Posted on Sep 16, 2022

It was the worst experience I've ever had. I lost my money and my clients because of them

Overall rating1.0
Quality1.0
Communication1.0
Schedule & Timing1.0
Mobile App DevelopmentWeb Development

I asked the seller to help me with building web and mobile apps starting with the business analysis phase The business analysis phase contains: 1. Functional Non-Functional Requirements 2. Use Cases 3. User flow diagrams They hired someone for the task and asked him to start working Before the BA starts, I surprised them when I send them most of the deliverables above (1. Functional Requirements and 3. Use Cases) which means I finished most of the work before the work even started The BA wasn't qualified and was moving really slowly trying to expand the time to let me pay more I went to Upwork and posted a job I was shocked when the seller BA applied for my job on Upwork while he was working on my project (They were hiring freelancers from outside their company) The new BA started working for two days, and when I reviewed his work, I found a lot of issues. I fed up and asked to cancel the project and get my money back and they ignored me and stop responding. They stole my money!

Marzouq Albehairi, Founder at Tutark.comVerified Review
Posted on Sep 23, 2021

I am really happy with them and the work they delivered

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

i been working with capital numbers for around 6 months and the goal was to make my dream website and what im trying to say here is its no longer a dream thanks to them and their high level of work ethics, i would love to recommend them to anyone seeking small to big projects they seek always to find answers for your questions , im really happy with them and the work they deleived

John RennieVerified Review
Posted on Sep 21, 2021

Four page web design and development

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

The group at Capital Numbers did an excellent job designing and building out our website for us. They provided timely communication and updates on the project. We were very pleased with the outcome and the efficiency with which the project was completed. We will definitely consider them for future projects.

Focus

Service Focus of Capital Numbers

How the team's effort is distributed across services.

20%10%10%10%10%10%10%10%10%

Industries Focus

10%10%10%10%10%10%10%10%5%5%

Client Focus

Small Business20%
Medium Business80%

The Positioning

AI Tools & Purpose

The stack the team uses to move faster.

Cursor
code development
Claude
code development
Selected Work

Client Portfolio of Capital Numbers

Where their work concentrates - by industry, budget, and timeline.

Project Industry

Education11%
Insurance11%
Travel11%
Fintech11%
Business Services11%
Advertising & Marketing11%
Transportation & Logistics11%
Healthcare11%
Other11%
Major industry focus
Education

Project Cost

$10001 to $5000044%
$100001 to $50000011%
$0 to $1000044%
Common project cost
$10001 to $50000

Project Timeline

1 to 25 Weeks78%
26 to 50 Weeks11%
51 to 100 Weeks11%
Typical timeline
1 to 25 Weeks

Clients: 11

Consumer ReportsThomson ReutersST EngineeringFidelity PaymentsStoneAcreCinepolisBDBASFSavillsDPDVeolia

Portfolios: 9

Executive Interview

Executive Interview of Capital Numbers

Mukul Gupta
Mukul Gupta
Founder
Visit Profile

Please introduce your company and give a brief about your role within the company?

Capital Numbers is a D&B accredited, ISO 9001 & 27001 certified global software solutions provider. We help CTOs, Software Founders, and Small Businesses get their software, web, or mobile apps done on time, using fully managed teams that integrate seamlessly into their projects. Our clients include Reuters, Conde Nast, AppDetex, Equipo, University of Colorado, Credit Sesame, Grey Digital, and many more. We also partner with Digital Agencies and Development Companies worldwide as their white label development partner. Headquartered in Kolkata, India, we're a company of 400+ specialists with sales offices and legal entities in the US and Australia. We are winners of several awards including - ➊ 2018 - Financial Times "Asia Pacific Top 1000 Companies." ➋ 2017 - Dun and Bradstreet "Leading SME of India." ➌ 2016 - Deloitte "50 Fastest-Growing Tech Companies." I am the Founder and CEO of Capital Numbers and responsible for driving the growth, strategy, and attainment of the Company's vision and mission.

What was the idea behind starting this organization?

Back in 2012, digital operations and technologies were evolving rapidly, and two key trends were emerging. Firstly, the adoption of DevOps & Open Source frameworks was becoming popular within larger and more established organizations. Secondly, browsers and front-end technologies were rapidly evolving to deliver UI/UX experiences that were previously impossible. We scouted the market place. We found that no one was focusing on this trend and hence took the plunge and started Capital Numbers to concentrate on this niche. We specialize in delivering innovative digital experiences using modern tech stack and development practices.

What is your company’s business model–in house team or third party vendors/ outsourcing?

We have a 100% in-house team of 400+ UI/UX Specialists, Developers, Testers, Business Analysts, and Project Managers working at our delivery centers in Kolkata.

How is your business model beneficial from a value addition perspective to the clients compared to other companies' models?

Production costs represent nearly 30% - 50% of any organization’s digital initiative. This money is usually spent on the creation of digital assets for a business and include websites, mobile apps, and software applications. To fulfill this need, the first thing that any organization needs is an efficient workforce that can deliver. There are obvious financial and operational limitations to hiring and retaining local developers and agencies. The hiring of freelancers through online platforms can be a very daunting process even though there are plenty of great freelancers out there. Finding reliable freelancers is challenging, and there are apparent scalability issues. This is where we step in. We offer “In-Demand Skills, On-Demand.” Our business model is adequately equipped to cater to our client’s tech needs “on-demand” so that they don’t have to worry about expensive in-house staffing or getting stuck with unresponsive freelancers. We give our clients access to digital talent that they need when they need it. This helps our clients to decouple the production process from everything else and thus become genuinely strategic and solution agnostic. Our delivery teams, capabilities, and infrastructure are transparent and tailored to our clients’ specific needs. Our model helps clients save 20% to 40% of the costs that they can spend on bigger marketing spends, or savings add straight to their bottom line. To ensure our clients can 100% trust us, we - ● Have Local offices around the USA, Australia, and India ● Focus on quality to ensure that our work is world-class and at par with the industry standards. ● Hire talented people who are treated well and compensated generously. ● Invest heavily in our people, our workplace, our tools, and ensure we are efficient and consistent.

What industries do you generally cater to? Are your customers repetitive?

We cater to a variety of industries and have clients in Non-Profits, Online Publishing, IT & Software Services, Healthcare, Finance, and Legal industries. We have nearly 90% repeat business.

Mention the objectives or the parameters critical in determining the time frame of developing a web app.

The time that your team will need to develop your web application will mostly depend on its complexity. By complexity, we mainly mean the number of custom features you want and how your web application will be used. The simplest version of an application is a website where only one person manages content, no online payments are conducted, and no integrations are needed. An informational website about a company and its services is one such example. The complexity of a custom web application will increase as soon as you want to: ● Have complex workflows ● Allow all users to register and add their content ● Sell online ● Let others buy and sell on your website (C2C) ● Integrate your app with other applications, APIs, etc. ● Localize your website for multiple geographic locations So the time taken for your web app will depend on specific and customized features you would want to incorporate into your website. The development process that your team follows may also have a significant impact on its timeline. For example - ● Do you expect detailed comments or documentation? ● What documents and materials must be produced before development, such as detailed specs, wireframes, etc.? ● Do you plan to follow specific coding standards like PSR or OWASP? ● Are you planning to write unit tests? ● What testing processes are designed before deployment to production? Other organizational factors which may impact the timeline are: ● Familiarity with business domain ● Technology expertise ● Availability of reusable codes

How much effort in terms of time goes into developing the front-end and back-end of a web app?

Very roughly, about 80% of a project’s time is effectively spent on the development of back-end and front-end while the remaining 20% is spent on Testing, QA, Meetings, Documents, and other organizational processes.

What are the key parameters to be considered before selecting the right platform for a web application?

The first point that needs to be kept in mind is the type of web application you’re developing. A tech stack is a toolset for creating a web app, so you need to fully realize what you’re planning to build to pick the appropriate tools. Web projects can be of three types: ● Simple - These web applications are created with the help of out-of-the-box solutions, for instance, CMS software. Landing Pages and simple Online Stores are examples of such simple web apps. ● Mid-level - These apps have more custom functions than simple apps and are built with the help of frameworks, for example, large eCommerce Stores and Enterprise Apps. ● Complex - These web apps have lots of functionalities and integrations. They’re developed with the help of different web development technologies. They may be composed of several programming languages. Social Networking Sites, Healthcare Applications, and Fintech software are some of the examples of complex apps. Then you need to answer the following questions - ● Do you need to process heavy loads like video processing, crawlers, scraping? ● Do you need low latency features like an online chat? ● Which 3rd party integrations are needed? ● How soon you need to go live? Shorter development cycles mean relying on more out-of-the-box solutions or choosing a solution with many 3rd party modules. ● Does the proposed framework has a large developer community? ● Is the proposed platform stable and well documented? ● Does the platform have any security issues? ● Is the platform scalable? ● Are there any licensing costs involved? After these decisions, you can choose an appropriate front-end and back-end framework.

Which platform and technologies do you prefer to use in the development of your web apps?

We usually work with the following - ● CMS - WordPress, Drupal ● eCommerce - Magento, WooCommerce, Shopify ● Back-end - PHP (Laravel, CodeIgniter, Symfony), Python (Django, Flask), RoR, NodeJS, ASP.NET ● Front-end - HTML5, React, Angular, VueJs, TypeScript ● Mobile - iOS, Android, Hybrid ● Database - MySQL, NoSQL, DynamoDB, MongoDB, Firebase, RDS, SQL Server ● Cloud - AWS, GCE, Azure ● DevOps - Jenkins, Docker, Kubernetes, Nagios, NewRelic

Do you offer website design templates or customized website design, and do you have a responsive website design?

We offer a 100% custom web design service based on client needs, and these are typically responsive and tested across several browsers and different resolutions. In some cases, we do customize website templates purchased by the client from ThemeForest or other similar websites.

Which Content Management System do you prefer to use (Wordpress, Joomla, Drupal, etc)?

WordPress and Drupal. Limited availability is there on Joomla.

Do you provide website maintenance services?

Yes.

What are the key factors that you consider before deciding the cost of a web application?

The estimated effort required for web application is the main factor determining the cost of web development. The estimated effort, in turn, depends on the complexity and various other factors, as mentioned above.

What kind of payment structure do you follow to bill your clients? Is it Pay per Feature, Fixed Cost, Pay per Milestone (could be in phases, months, versions etc.)

This depends on the type of engagement model. We currently offer the following two models: Fixed Price - It’s a perfect collaboration type for small short-term projects with a defined end product in mind. We provide an upfront detailed estimation along with a delivery schedule. We are also fully responsible for completing the project and meeting all the client needs within the agreed timeframe. There is an advance deposit of 20% - 50% depending on the project size, and the remaining payment is milestone-based, which is discussed and mutually agreed to upfront. Dedicated team - This type of collaboration means that a client gets a team of developers that work exclusively for them for 8 hours a day, 20 days a month. Clients can personally interview and approve each candidate, which means they will be aware of what expertise and knowledge they possess. The client makes a monthly payment based on the number of people working for them. There is an advance deposit for 15 - 30 days of service, and then the client simply makes a payment on a specific date fixed for every month. Risk-Free trials are also offered for up to two weeks.

Do you take in projects which meet your basic budget requirement? If yes, what is the minimum requirement? If no, on what minimum budget you have worked for?

Yes. We have a minimum budget of $5000, but we do work on smaller projects in case it is an ongoing relationship, for example, in case of agencies or software companies subcontracting work to us.

What is the price range (min and max) of the projects that you catered to in 2018?

$5000 - $400,000.

Kindly share your feedback on how Goodfirms has been doing so far in increasing your visibility among potential clients.

We have only recently started actively promoting ourselves on Goodfirms, and it has been steadily giving us traffic and leads.

Where we are

Locations (4)

Offices where Capital Numbers operates.

Headquarter
India

India

Mani Casadona, East Tower, Unit No 8E4, 8th Floor, Action Area 2, New Town, Rajarhat
Kolkata, West Bengal 700156
+91-33-6799-2222
India

India

Gsc Towers, Plot B, Delhi - Jaipur Expy, South City, Block A, Saini Khera Village, Sector 30
Gurgaon, Haryana 122001
+91 62932 62932
United States

United States

548 Market St
San Francisco, California 94104
+1 619-331-2970
India

India

1st and 2nd Floor Sky Loft, Creaticity Mall, Survey No 190/192, Opp: Golf Course, Off Airport Rd, Shastrinagar, Yerawada
Pune, Maharashtra 411006