Free and open first
Best Performance Testing Software in 2026
To understand how an application handles demand, compare performance testing software by the kinds and scale of tests it supports. Load testing, stress testing, and distributed load indicate different dimensions to consider, while maximum virtual users offers another comparison point. API testing and browser-based testing can help you assess fit for your targets, and the deployment model may matter for your environment. Artillery, Locust, and Taurus are among the entries. Free-plan availability and paid-from pricing round out the comparison, helping you weigh costs against the listed testing capabilities.
- 38 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Avidemux
Free plan Open source LinuxMacWeb+1 - 2
Apache JMeter
Free plan LinuxMacSelf-hosted+1Apache JMeter offers protocol-level load testing, reporting and extensibility at no cost. It is not a browser-rendering tool, and load tests should run in command-line mode.
- 3
Artillery
Free plan APILinuxMac+3Artillery brings load tests, Playwright-based testing, and production monitoring into one toolkit, with integrations for observability and CI tools.
- 4
Blackfire.io
Free plan APIExtensionLinux+3Choose Blackfire.io if you need profiling and performance analysis for PHP or Python across application stages, with pipeline integrations.
- 5
BlazeMeter
Free plan APIExtensionLinux+2BlazeMeter combines several testing types with service virtualization and AI-assisted test triage. Its listed free limits and paid plan details help clarify the scale available at each tier.
- 6
Fortio
Free plan APILinuxMac+3Fortio combines load generation, latency reporting, and server utilities in a free open-source project.
- 7
Gatling
Free plan APILinuxMac+3Choose Gatling if you need load, stress, API, or distributed testing and want code, no-code, or Postman-based test authoring.
- 8
HammerDB
Free plan LinuxSelf-hostedWeb+1HammerDB covers benchmarking across several database systems and provides multiple ways to run workloads.
- 9
Loadster Synthetic Monitoring
Free plan APIExtensionLinux+4Loadster combines scripted monitoring, diagnostics, alerts, and status pages, with options for public or self-hosted checks.
- 10
LoadFocus
Free plan APIExtensionWebLoadFocus covers load testing alongside page-speed, API, and UI testing, with both JMeter and k6 workflows.
- 11
Locust
Free plan APILinuxMac+3Locust combines Python-authored tests with live reporting, adjustable load, and distributed execution. Its automatic OpenTelemetry instrumentation is currently limited to the requests library.
- 12
OctoPerf
Free plan APILinuxSelf-hosted+1OctoPerf offers several test types, live monitoring, and customizable reporting, with both SaaS and on-premise deployment. The free plan is limited in virtual users, duration, and parallel runs.
- 13
Loader.io
Free plan APIWebLoader.io provides configurable load tests and real-time monitoring for web apps and APIs.
- 14
Speedscale
Free plan APILinuxMac+3Choose Speedscale if your team wants to test APIs and load using captured production traffic, or run the full stack in a customer’s AWS, GCP, or Azure account.
- 15
Grafana k6
by Grafana k6Free plan LinuxGrafana k6 combines several kinds of testing with tracing, logging and profiling capabilities.
- 16
LoadStrike
Free plan APISelf-hostedLoadStrike focuses on full-workflow testing while keeping execution on the customer’s infrastructure. The Free plan has usage limits, and Pro is listed at an early-bird $299.00 per month.
- 17
Taurus
Free plan LinuxMacSelf-hosted+1Taurus brings multiple test engines, reporting formats, and CI integrations under one automation framework. Its installation and cloud requirements vary by test type and execution method.
- 18
Tsung
Free plan LinuxMacSelf-hosted+1Tsung offers broad protocol coverage, distributed load generation, and detailed benchmark reporting at no listed cost.
- 19
Vegeta
Free plan APILinuxMac+2Vegeta combines constant-rate HTTP load generation with multiple output formats and HTTP/2 and TLS controls.
- 20
Xceptance LoadTest
Free plan APILinuxMac+2Choose XLT if your team needs a free, open-source Java-based load testing tool with distributed execution and browser testing.
- 21
StresStimulus
Free plan Self-hostedWindowsChoose StresStimulus if you need configurable load tests, real-time metrics, and options to distribute generators across deployment environments.
- 22
Goose
Free plan Self-hostedGoose provides code-driven load testing with aggregated metrics and flexible deployment. Teams should consider its Rust workflow and incomplete control interface before adopting it.
- 23
Apica LoadTest
Free trial AndroidAPIiPhone+3Apica LoadTest covers a broad testing workflow, with browser-based management, integrations, and mobile testing described.
- 24
Keysight Eggplant Test
Free trial AndroidAPIExtension+6Eggplant Test covers screen-based, model-based, visual, and API testing across a wide range of targets. Teams can request pricing or try it free, but there is no free plan.
- 25
OpenText Core Performance Engineering
Free trial APILinuxMac+3OpenText Core Performance Engineering combines broad application coverage with large-scale distributed and hybrid testing.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price