Open Source SaaS Alternatives, Self-Hosted Software & COSS Benchmarks

105 projects

Testing & Code QualityCommercial competitors →Market trends →Hero & design styles →

Open-source projects · GitHub Stars
Project	Tagline	License & Stack	Stars	Visits	Commercial
ZeroLeaksCOSSx1xhlol/system-prompts-and-models-of-ai-toolsZeroLeaks attacks your agent through its tools, memory, and credentials on every change.	ZeroLeaks attacks your agent through its tools, memory, and credentials on every change.	GPL	80.8K	<5K	$149/mo
Haystack EditorCOSSmicrosoft/vscodeHaystack gives your coding agent hundreds of copies of your app, each set up like one of your customers.	Haystack gives your coding agent hundreds of copies of your app, each set up like one of your customers.	MIT	15K	<5K	$1,000/mo
Stagehandbrowserbase/stagehandIntroducing Stagehand	Introducing Stagehand	MIT	13.2K	—	—
Mailpitaxllent/mailpitMailpit - email & SMTP testing tool with API for developers	Mailpit - email & SMTP testing tool with API for developers	MIT	10.9K	—	—
hoppscotchCOSShoppscotch/hoppscotchMake Better APIs	Make Better APIs	MIT	9,259	—	$6/mo
keployCOSSkeploy/keployAI writes code · Keploy catches what breaks	AI writes code · Keploy catches what breaks	MIT	8,344	101.8K	$19/mo
Midscene.jsweb-infra-dev/midsceneSee interfaces like a human E2E testing in natural language	See interfaces like a human E2E testing in natural language	MIT	8,238	30.4K	—
RequestlyCOSSrequestly/requestlyAI-first API Platform designed for Enterprises	AI-first API Platform designed for Enterprises	Fair-code	6,765	132.9K	$10/mo
DeepEvalconfident-ai/deepevalUnit testing for LLMs.	Unit testing for LLMs.	Apache	6,292	124K	—
DetailCOSStailscale/tailscaleWe fix bugs in the background while you ship features.	We fix bugs in the background while you ship features.	BSD	6,149	20.5K	$30/mo
LocalStackCOSSlocalstack/localstackThe cloud wasn't built for modern software development.	The cloud wasn't built for modern software development.	Apache	4,877	136.3K	$45/mo
MaestroMCPmobile-dev-inc/maestroGo ahead.Code at 150mph.	Go ahead.Code at 150mph.	Apache	3,558	132.2K	$250/mo
hurlOrange-OpenSource/hurlWhat’s Hurl?	What’s Hurl?	Apache	3,393	—	—
ast-grepast-grep/ast-grepFind Code by Syntax	Find Code by Syntax	MIT	2,932	11.5K	—
SparrowCOSSsparrowapp-dev/sparrow-appSparrow – A Free, Open Source API Testing App and Postman Alternative	Sparrow – A Free, Open Source API Testing App and Postman Alternative	—	2,875	<5K	$10/mo
k6grafana/k6Loved by developers. Trusted by businesses	Loved by developers. Trusted by businesses		2,672	138.5K	—
Front-End ChecklistMCPthedaviddias/Front-End-ChecklistTrusted front-end quality rules for humans and AI agents	Trusted front-end quality rules for humans and AI agents	CC0-1.0	2,581	—	—
InsomniaCOSSKong/insomniaAI-ready APIs Built Smarter. Tested Faster. Governed Better.	AI-ready APIs Built Smarter. Tested Faster. Governed Better.	MIT	2,481	143.3K	$12/mo
Inbucketinbucket/inbucketInbucket disposable webmail	Inbucket disposable webmail	MIT	2,313	—	—
RequestlyCOSSrequestly/requestlyAI-first API Platform designed for Enterprises	AI-first API Platform designed for Enterprises	non-standard	1,990	105.7K	$10/mo
CypressMCPcypress-io/cypressAI writes the code. Cypress proves it works.	AI writes the code. Cypress proves it works.	MIT	1,974	196.2K	$67/mo
Vitestvitest-dev/vitestA Vite-native testing framework. It's fast!	A Vite-native testing framework. It's fast!	MIT	1,801	168.1K	—
ShellCheckkoalaman/shellcheckfinds bugs in your shell scripts.	finds bugs in your shell scripts.		1,729	29K	—
Locustlocustio/locustAn open source load testing tool.	An open source load testing tool.	MIT	1,685	84.3K	—
Vulhubvulhub/vulhubFrequently asked questions about using Vulhub and working with vulnerable docker environments	Frequently asked questions about using Vulhub and working with vulnerable docker environments	MIT	1,651	8.4K	—
ReqableMCPreqable/reqable-appHigh Performance API Development Tool	High Performance API Development Tool	—	1,532	138.3K	$3/mo
Ultracitehaydenbleasel/ultraciteThe linter and formatter for agentic development	The linter and formatter for agentic development	MIT	1,516	—	—
Appiumappium/appiumWelcome	Welcome	Apache	1,436	66.6K	—
Responsivelyresponsively-org/responsively-appMaster the Art of Crafting Responsive Web Apps like a Pro!	Master the Art of Crafting Responsive Web Apps like a Pro!	MIT	1,396	35.3K	—
gophishgophish/gophishOpen-Source Phishing Framework	Open-Source Phishing Framework	MIT	1,246	51.5K	—

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