PFLB specializes in performance testing and performance engineering services. We help companies find and resolve performance bottlenecks such as ill-performing API calls or slow database queries.Our deep understanding of the space helps companies gain more confidence around launching apps in production. In addition, we provide customers with custom solutions based on our next-generation load testing platform. With over 15 years of experience providing performance testing solutions worldwide, PFLB has built a reputation for reliability.
Focus Areas
Service Focus
- Testing Services
Client Focus
- Medium Business
- Small Business
- Large Business
Industry Focus
- Banking
- Financial & Payments
- Healthcare & Medical
PFLB Executive Interview

Additionally, it does not matter which client-server protocol the system uses. We test not only web applications but also complex legacy systems based on two-tier Oracle protocols, soap-HTTP, Siebel, and others, including encrypted protocols.
We are often asked in which cases it is more effective to outsource services than to have a team of testers from the company staff.
We use a personalized approach to every current and potential client; it is always unique because we try to find the best way for every particular case using only the newest and innovative technologies. By far we have got a lot of positive feedback.
PFLB Clients & Portfolios
Key Clients
- Tinder
- Illumina
- Udacity
- Splunk
- SolarWinds
- E-on
- Raiffeizenbank
- Samsung

PFLB Reviews
- All Services
- Testing Services
- Relevance
- Most Recent
- Rating: high to low
- Rating: low to high
Load testing of our Electronic health record software
Review Summary
PFLB's testing enhanced performance, tackling issues proactively. Detailed reports aided improvements. The project manager's guidance refined strategies for long-term goals.
Results were clear - improved software performance, higher user satisfaction. PFLB's professionalism, expertise, and commitment are vital. Eager to continue for better software performance.
Describe your project in brief
We hired PFLB to continuously conduct load testing for ongoing Electronic Health Record software releases twice a month. And it has been a very amazing time with them with the team provided to us and the PM being very involved and provided guidance above and beyond our expectations.
What is it about the company that you appreciate the most?
The team communication skills was of top-notch, they always keep us updated about the working process
What was it about the company that you didn't like which they should do better?
Actually, Nothing They delivered excellent service
Application testing for Zohari Credit Limited
Review Summary
What was the project name that you have worked with PFLB?
Application testing for financial service firm
Describe your project in brief
We hired PFLB to do our lending application testing. I only wish every tech firm I have worked with (and frankly everyone I have work with ) were as organized, professional and thorough as them. From clear expectations to reporting, they were a delight to work with. One of my best professional experiences and I am incredibly particular
What is it about the company that you appreciate the most?
They were able to pin point the error very easily. They are more professional, And they were able to meet the deadline before the agreed time.
What was it about the company that you didn't like which they should do better?
They did an excellent job, and I will work with them next time.
Stress testing project done great
Review Summary
What was the project name that you have worked with PFLB?
Stress testing project
Describe your project in brief
We sought to ensure optimal performance, scalability, and stability of our flight booking website to handle increasing user loads, providing a seamless booking experience and gaining a competitive edge in the market.
What is it about the company that you appreciate the most?
PFLB follows an agile project management style, emphasizing flexibility and iterative development. They are our go-to provider of performance testing services.
What was it about the company that you didn't like which they should do better?
It would be perfect if they could also provide security testing services
PFLB is really good at stress testing
Review Summary
I recommend PFLB and Yurii Kovalov, the CEO, as a competent and experienced team.
What was the project name that you have worked with PFLB?
Stress testing project
Describe your project in brief
Our AI based smart contract validation software had a long waitlist. To ensure its reliability, we stress-tested it with PFLB's expert engineers. They helped us address performance issues before the launch. PFLB's in-house platform continues to support our testing of software updates.
What is it about the company that you appreciate the most?
PFLB is really good at stress testing
What was it about the company that you didn't like which they should do better?
Everything was fine

PFLB deliver on time and have a great customer-oriented culture
Review Summary
PFLB implemented a cloud platform for performance testing, which made it easy for us to scale and test our software. They also created a methodology for load testing, created a test environment, and provided additional volumes of test data to help us accurately simulate real-world usage.
We were impressed with their ability to import our existing JMeter scenarios into PFLB, allowing us to run tests seamlessly from the cloud. They also set up the launch of load tests inside the CI/CD pipeline through Jenkins, streamlining our testing process.
PFLB's team analyzed test results for all releases and identified performance bottlenecks, providing us with recommendations for optimizing our software's performance. They also provided detailed test reports, allowing us to track our progress and make informed decisions.
What was the project name that you have worked with PFLB?
Performance testing of a fintech software
Describe your project in brief
We rely on PFLB for performance testing of our software used by 50,000+ users worldwide. Their cloud platform, methodology, and seamless JMeter integration make load testing a breeze. PFLB is our go-to for rock-solid testing.
What is it about the company that you appreciate the most?
They are an excellent one-stop shop for performance testing, having everything in place, including their load testing platform, skilled performance engineers, and training.
What was it about the company that you didn't like which they should do better?
I have nothing to mention here

PHP and backend performance tuning on local and production environments
Review Summary
PFLB brought skills to the table that I didn't have and provided improvements that justified the cost.
What was the project name that you have worked with PFLB?
Website performance testing and php tuning.
Describe your project in brief
Determine the source of the problem causing the website to crash under the strain of more than five users during download sessions for mp3 files.
What is it about the company that you appreciate the most?
Very good skill sets for php and general performance tuning.
Daily check-ins to keep the efforts moving forward and on-track.
Strong customer service attitude and took the time to understand the problem from my perspective.
What was it about the company that you didn't like which they should do better?
English skills were quite good but I wasn't always sure that explanations were as detailed as they would have been in the speaker's native language.

Hi Fredric, We appreciate your feedback and apologize for the inconvenience in communication. Now we understand our weaknesses better and will do our best to improve. Thank you.

Skillful and professional team
Review Summary
Perfect Test Services
Review Summary

CSV automation solution
Review Summary

AAA+++ Great company and Great leadership!!!
Review Summary
What is it about the company that you appreciate the most?
Quality-oriented and Close to customer needs, working with the customer on every single point to make sure all covered. Great support and performance
What was it about the company that you didn't like which they should do better?
Grow the company and have offices in many other states, not just California