Deliver high performance websites faster. Be prepared for holiday peaks!

We've taken the complexity out of load testing –  even the novice tester can know the real performance limits of their software

Performance testing with Load Impact 3.0

Test your backend performance before failure happens. Ensure that your product will not let your users down when they need it most.



Run Very Large Tests

Use Load Impact 3.0 if you need to run very large tests where there are more than 5000 Virtual Users (VUs). Run tests with up to 100,000 VUs. Expecting a major event-- Black Friday is approaching. Load Impact 3.0 ensures that your system will handle the extra load.


GUI-based Ease of Use

Load Impact 3.0 offers an easy-to-use Graphical User Interface (GUI) for creating, configuring and running load tests. Manage everything in the Load Impact 3.0 application.


Test Execution and Analysis

Execute tests from the web app GUI, or use the Load Impact 3.0 CLI or API to trigger test runs from your Continuous Integration (CI) tool. Analyze the load test results in the web app, too.

Learn More  


$ pip install loadimpact-cli
$ loadimpact test run 
Initializing test ...
TIMESTAMP:                VUs [1]:         reqs/s [1]:      bandwidth [1]:   user load time [1]: failure rate [1]:
2018-04-20 17:32:23+00:00 1.0              1.65880228503    444675.79207     -                   -
2018-04-20 17:33:00+00:00 2.0              1.65655724996    444309.858371    -                   -
2018-04-20 17:33:03+00:00 2.0              1.65174480411    442789.175918    150.41              -
2018-04-20 17:33:36+00:00 2.0              3.31532339156    889063.643269    150.595             -
2018-04-20 17:34:03+00:00 2.0              1.65779745031    444464.780093    124.19              -
2018-04-20 17:34:06+00:00 3.0              1.65459748111    443768.339145    119.52              -

What you can do with Load Impact 3.0

Powerful load testing solution for websites, web apps and APIs

API testing

API load testing from simple API hammering to complex API user scenarios.

Website & app testing

Enhanced performance leads to greater customer satisfaction, better conversion rates and more revenue. Determine the scalability of your website or app with just one click - no programming required.

Automated testing

A solution for the modern engineering team that wants to performance regression test as part of their test automation pipeline.


Track all the essential performance testing metrics you need. On top of that, performance trending helps you keep track of your performance progress.



Essential performance metrics

Collect all the essential performance metrics for your test runs: response times, throughput, availability and utilization metrics.


Custom metrics

Maybe one of your important performance KPIs is not included out-of-the-box. Use custom metrics to track whatever you want. Track finer grained network metrics like latency/time-to-first-byte, TCP connection time and TLS handshake time.


Pass/fail with thresholds

Configure your tests with metric thresholds to get a pass or fail for every test run. This is an essential step for performance testing automation.



Plot individual metrics (general, URL, pages, custom or server metrics) or add them to the main chart for easier correlation.

Step 1

Create a custom metric in your script to collect the result data you need.



local r = http.get("")
result.custom_metric("latency", r.time_to_first_byte)

Step 2

Set thresholds based on the custom metric (see last point) in your test config and plot the metric on the result page.



Step 1

Add thresholds to you test configuration.




Step 2

See the test pass/fail status on the test result page.




Learn about all the great things you can do when you load test your API, Website or App with Load Impact 3.0

Easy-to-use scenario recorders

Record an HTTP session using our proxy recorder or our Chrome Extension and let the simulated users perform the same actions during the test.

Test scheduling and automation

Configure your load tests to run in the middle of the night or once per week - you don't have to be around at all! You can also include Load Impact as part of your Continuous delivery process with the use of our Jenkins, Circle CI and TeamCity plugins, as well as our open API.

Learn more

Multiple data stores

Make your tests data-driven. Simulate real users by including several sources of parameterized data in your scenario scripts. Simply upload CSV files containing the data you wish to use - such as login credentials, product IDs, URLs, etc. - and associate it with the desired script.

Performance trending

Plot a single, high-level performance metric collected over multiple test runs to locate patterns of performance degradation or improvement, and more easily validate the performance impact of code and infrastructure changes over time. Make sure your service is delivering on time.



Check out all features

Integrate into your automation pipelines

At Load Impact, we are serious about developer speed and quality, and work hard to make sure our performance testing technology and service seamlessly fits within the modern developer toolchain,
including continuous integration (CI), continuous delivery (CD), pipeline and deployment automation tools.


Learn more about Integrations and Load Impact 3.0