Load and Performance
Testing Services

Since 2008, we’ve provided performance testing for startups to global enterprises: 150+ performance engineers have tested websites, APIs, mobile apps, SAP and core banking systems for 300+ companies.

Trusted by
Leading Companies

Utilize Software Performance
Testing Solutions

  • Ensure Scalability
    for Growth

    Scalability testing measures system scalability: how your app handles higher user loads, so it grows without losing performance.

  • Identify Bottlenecks
    and Breaking Points

    Identify performance bottlenecks and the application’s true limits by simulating extreme and unpredictable load conditions.

  • Maintain Stable
    System Performance

    Prove stable performance over long periods with advanced endurance and reliability testing.

  • Minimize Incidents

    Protect application stability: minimize risks of crashes or failures when operating under sustained heavy load.

  • Capacity Planning,
    Lower Cloud Costs

    Measure resource utilization, determine optimal cloud resource allocation for your workloads and significantly reduce costs.

  • Resolve Bottlenecks with
    Root Cause Analysis

    Find and fix bottlenecks that slow down or limit application performance.

Our Load and Performance
Testing Services

Prevent system failures and ensure optimal performance with our software performance testing services.
We use the best tools and practices to optimize your web and mobile applications, and enterprise IT systems.

  1. Load Testing

    We apply load to your product with virtual users that mimic real behavior. This helps identify potential issues and shows how performance can be optimized.

  2. Stress and Spike Testing

    Stress testing pushes the system far beyond its expected capacity, deliberately causing failure. This allows us to understand exactly how and when the system will break under extreme conditions. Spike testing adds the sudden-surge shape: traffic that doubles in a minute, then falls away.

  3. Endurance Testing

    We can simulate the behavior of a system under a sustained load from several hours to several days. These tests help bring to light memory leaks and buffer overflows.

  4. Data Volume Test

    We will generate consistent test data in your product’s database and conduct load tests, providing you with precise insights into the database’s threshold limits.

Book Free Consultation

Case Studies

  • Load Testing Storm
    Center Software for PEC

    Our customer PEC has recently launched brand new storm center and outage reporting systems to ensure a seamless experience for clients during Texan storms.
    With the assistance of PFLB’s professional services, they simulated storm-specific user behavior and ensured the applications’ ability to handle heavy user traffic.

    Read Full Case

  • Scaling MEFA Pathway Software for Mass Student Registration

    A Massachusetts-based e-learning services provider, FolderWave, faced significant strain on their systems due to cyclical educational processes and increased online learning.
    PFLB delivered product performance testing services to emulate peak user loads, identifying and resolving critical performance issues. The process ensured that FolderWave’s systems could handle high volumes of student activity, strengthening their reliability and reputation in the industry.

    Read Full Case

  • NOV, Texas Oil & Gas Innovator, Excels with Real-Time Drilling Data After Load Testing

    Discover how NOV, the US global leader in oil and gas equipment and IT products, ensured uninterrupted services. Facing a shortage of internal performance engineers, Steve Opel, NOV’s Principal Technology Manager, turned to PFLB for assistance.

    The objective was to find a load test service that could consistently simulate the peak load on max completions, replicate performance issues, and identify potential bottlenecks, allowing NOV to optimize their system’s performance.

    Read Full Case

PFLB Client’s Review

Testimonials from satisfied clients across various industries.
  • Rating: 5 out of 5 stars

    I was highly satisfied working with PFLB. They're a fantastic one-stop shop for software performance, with everything you need—their platform and skilled engineers. I've used them three times to load test the College Board software before big updates, and it all went smoothly. Plus, I love that they store all the testing data, so we can track performance capacity over time.

    client testimonial

    client testimonial

  • Rating: 5 out of 5 stars

    It was a pleasure working with PFLB, and I'd recommend them for performance testing. They quickly got up to speed with our complex software architecture and were super productive in setting up our load test environment in the cloud. They were really dedicated to improving our product with their strong expertise in performance optimization.

    client testimonial

    client testimonial

  • Rating: 5 out of 5 stars

    PFLB was willing to work with a very small solopreneur without an enormous investment in capital. Their prices were reasonable and provided me with notable improvements to my php performance.

    client testimonial

    client testimonial

  • Rating: 5 out of 5 stars

    PFLB did benchmarking tests on our database storage engine under standard and uncommon conditions, using specialized tools. Their analysis gave us valuable insights and recommendations to boost our product's performance. I highly recommend PFLB to anyone looking for an expert performance testing company.

    client testimonial

    client testimonial

  • Rating: 5 out of 5 stars

    We smoothly moved over 30 JMeter projects to PFLB, and it's been a total game changer. It's given our team of 50+ remote performance engineers the ability to handle large-scale load tests every day with real ease.

    client testimonial

    client testimonial

  • Rating: 5 out of 5 stars

    PFLB's testing team helped us successfully complete the FDA regulations with a great test coverage for the computer system validation (CSV) process at Illumina. I highly recommend Yuri Kovalov and his team—they're top-notch professionals in performance and load testing.

    client testimonial

    client testimonial

  • Rating: 5 out of 5 stars

    PFLB has been Tinder's load testing provider for over 5 years, and it is a true pleasure working with them. They managed the entire performance engineering process for our app releases, helping us fix tons of performance issues. I highly recommend PFLB as a reliable vendor.

    client testimonial

    client testimonial

5.0

Rating: 5 out of 5 stars based on Clutch reviews

What Makes PFLB One of the
Top Load Testing Companies

  1. Experienced Performance Engineers

    With over 150 performance engineers on staff, PFLB offers unparalleled expertise in load testing services. Our team’s vast experience ensures that your applications perform flawlessly under any conditions.

  2. Innovative Testing

    We utilize the latest tools and best practices in performance testing to deliver cutting-edge solutions. Our innovative approaches enable us to efficiently identify and resolve potential bottlenecks, optimizing your systems for peak performance.

  3. Proven Track Record

    PFLB has a history of delivering tangible results for our clients. By preventing system failures and enhancing performance, we help businesses achieve seamless operations and improved user satisfaction.

  4. Commitment to Client Success

    At PFLB, we prioritize your success. We work closely with you to understand your unique challenges, providing dedicated support throughout the testing process to ensure optimal outcomes.

How it Works

No guesswork. Just execute your load test and get a comprehensive
AI-written report

  1. Discover Your Testing
    Needs

    In our initial call, we’ll review your performance testing needs, timeline, and the best engagement model—project-based or ongoing services.

    Schedule a Call

  2. Create a Strategy and Build the Team

    At this stage, we will develop a comprehensive strategy to perform performance testing that caters specifically to your needs and technology stack. Additionally, we will assemble a team of experienced performance engineers to execute the plan effectively.

  3. Get Started

    With our strategy determined and the team in place, we will now begin the project. As we move into the performance testing stage, we will provide you with regular updates to track progress and closely monitor important metrics to ensure alignment with your software testing goals.

Dive In Our
Knowledge Base

More Articles More Case Studies

Frequently Asked
Questions

How do you perform a load and performance test?
We use proven methodologies and advanced tools, like PFLB's Cloud JMeter or API load test tool to simulate real-world user scenarios, assessing your system’s performance under various conditions. As a leading performance testing service provider, we tailor our load and performance testing services to identify bottlenecks, integrate  them with your monitoring systems, and optimize your application’s efficiency. For a worked example, see our step-by-step guide to AI-driven load testing.
Can performance testing help us reduce costs?

Absolutely! By identifying performance issues early, our load testing services help you avoid costly downtime and over-provisioning. Efficient product performance testing ensures your resources are optimized, saving you money in the long run.

How soon will your load testing show results?

It depends on the scope. Full performance testing engagements are scoped individually — timelines follow the complexity of your system, the environments involved, and the depth of analysis required. If you need a first read fast, our separate fixed-scope package Load Test Express returns essential performance metrics such as response time and throughput in one week. Partnering with our expert team accelerates your time-to-market. Get started now.

Do you only offer performance testing services in the USA?

Not at all! While we reside in the USA, we also deliver from the UK and Iceland, with 150+ performance engineers on staff. As a leading performance testing service provider, we offer load and performance testing services globally to meet your needs wherever you are.

What do the best load testing services include?

The best load testing services cover the whole testing process: a workload model built from your production traffic, a testing environment with realistic test data, test execution against agreed response time targets, performance monitoring during every run, and root cause analysis of each issue found. Look for reporting capabilities that show performance metrics such as response time, throughput and resource utilization, and for performance validation on a retest after the fixes land.

What are the best performance testing services for enterprise systems?

The ones evidenced on systems like yours. Enterprise platforms have been our core since 2008: SAP, core banking, payment switches and legacy systems that web-focused vendors rarely touch. Our performance engineers test against dedicated or production environments, support capacity planning, and help optimize resource allocation so the system performs through peak usage periods without over-provisioning.

What performance issues does testing usually uncover?

Typical findings are slow response times under concurrent load, memory leaks that only hours of sustained load reveal, and system behavior that changes once real multi step user journeys replace synthetic clicks. We reproduce each finding, identify issues at their root, and retest until the fix holds, so your web applications and mobile applications remain stable through traffic spikes and maintain consistent performance afterwards.

Why hire an independent performance testing company instead of testing in-house?

Independent testing brings advanced tools, an outside view of your technology stack, and engineers who do nothing but performance work. In-house development teams know the code, but executing tests at scale is a discipline of its own: workload modelling, software engineering around test data, and reading results against business challenges rather than raw numbers. The key stages stay transparent, you keep the scripts and the software quality baseline, and testing early in the software development cycle is where the cost savings live. That reliable performance is what quality assurance signs off on, and what your users feel.

Need a
Helpful Hand?

Schedule a 1:1 call with a load testing expert to explore options, get a personalized quote, and start your service.

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