Top Open Source Automated Testing Tools in 2026
A curated collection of the 9 best free and open-source Automated Testing tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Hercules
Hercules is the first open-source testing agent, enabling zero-code, zero-maintenance UI, API, security, accessibility, and visual validations.
Stars1,131Last commit1mo agoLicenseAGPL-3.0Sentry
Error tracking and performance monitoring for developers
Stars44,628Last commit10d agoLicenseOpen SourcePeekaping
Self-hosted uptime monitoring for websites and APIs
Stars1,179Last commit3mo agoLicenseMIT
LostPixel
Open source visual regression testing tool
Stars1,682Last commit4mo agoLicenseMIT
HyperDX
Open source observability platform for logs, traces and errors
Stars9,865Last commit10d agoLicenseMIT
Workbench
Local-first dashboard for BullMQ queues
Stars433Last commit3mo agoLicenseMIT
EasyMonitor
Self-hosted uptime monitoring with multi-region probes
Stars74Last commit15d agoLicenseMITArgos
Visual testing for AI agents and teams
Stars616Last commit11d agoLicenseMIT
Testsigma
AI-powered unified test automation platform
Stars—Last commitRecentlyLicenseOpen Source
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Showing 9 of 9 open-source tools