Know how your website behaves under real traffic
As traffic increases, small inefficiencies compound. Website load testing shows whether your site remains responsive, predictable, and stable when real users arrive at scale.
Performance Degrades
Before Your Team Notices
Without load testing, the first sign of trouble is latency.
Pages respond slower under concurrent use, interactions lag,
and users leave without reporting a problem. Monitoring often
stays green.
Failures Are Intermittent
and Hard to Reproduce
Under load, issues appear only for some users, some requests,
or some moments in time. The site works, then doesn’t. Logs
look normal. QA cannot reproduce it.
These problems linger because they rarely fail consistently.
Capacity Limits Are
Discovered in Production
Connection pools, database limits, thread counts, and memory
ceilings are finite.
Without testing, their thresholds are unknown until real
traffic crosses them.
At that point, the system is already under stress.
One Bottleneck Slows the
Entire Site
A single overloaded service — search, content API, authentication, analytics — can block unrelated pages.
Users experience a slow website, even though only one component is failing. Without load testing, the source stays hidden.
Third-Party Dependencies
Fail Under Pressure
External scripts and APIs behave differently under high concurrency. Some slow down. Some queue requests. Some fail silently.
Without testing, these dependencies become single points of failure during traffic growth.
Performance Problems
Surface Too Late
By the time users report slowness or errors, traffic has already
dropped. Data is incomplete.
Root cause analysis becomes guesswork. And the marketing budget
is wasted.
The opportunity to fix the problem before impact is gone.
Performance Degrades
Before Your Team Notices
Without load testing, the first sign of trouble is latency.
Pages respond slower under concurrent use, interactions lag,
and users leave without reporting a problem. Monitoring often
stays green.
Failures Are Intermittent
and Hard to Reproduce
Under load, issues appear only for some users, some requests,
or some moments in time. The site works, then doesn’t. Logs
look normal. QA cannot reproduce it.
These problems linger because they rarely fail consistently.
Capacity Limits Are
Discovered in Production
Connection pools, database limits, thread counts, and memory
ceilings are finite.
Without testing, their thresholds are unknown until real
traffic crosses them.
At that point, the system is already under stress.
One Bottleneck Slows the
Entire Site
A single overloaded service — search, content API, authentication, analytics — can block unrelated pages.
Users experience a slow website, even though only one component is failing. Without load testing, the source stays hidden.
Third-Party Dependencies
Fail Under Pressure
External scripts and APIs behave differently under high concurrency. Some slow down. Some queue requests. Some fail silently.
Without testing, these dependencies become single points of failure during traffic growth.
Performance Problems
Surface Too Late
By the time users report slowness or errors, traffic has already
dropped. Data is incomplete.
Root cause analysis becomes guesswork. And the marketing budget
is wasted.
The opportunity to fix the problem before impact is gone.
Download our ultimate load testing guide for free.
Load testing helped an EdTech platform handle 1,000+ simultaneous student registrations without failures during peak enrollment events.
Read Full Case
With PFLB’s help, Tynor engineers analyzed the behavior of the site under load and identified several bottlenecks at the database and network levels. Then, there were several more iterations of fixing issues and load testing. Finally, website performance was improved by more than a factor of 30.
Read Full Case
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.
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.
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.
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.
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.
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.
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.
5.0
We’ll run a load test and explain where performance breaks down
and what to address next.
