Open source bot-detection projects
Every project in the registry tagged bot-detection, ranked by real GitHub adoption.
Stealth Chromium that passes every bot detection test. Drop-in Playwright replacement with source-level fingerprint patches. 30/30 tests passed.
APIs for browser automation, testing, and bypassing bot-detection. Includes CDP Mode: A stealthy configuration for chromium that passes every bot detection test
Stealth headless browser for AI agents — bypass Cloudflare, bot detection, and anti-scraping. Drop-in Puppeteer/Playwright replacement.
UAParser.js - The Essential Web Development Tool for User-Agent Detection. Detect Browsers, OS, Devices, Bots, Apps, AI Crawlers, and more. Run in Browser (clie
Security framework that protects from within your product
Runtime security for AI apps and agents: prompt injection detection, tool-call authorization, sensitive-data redaction, bot protection, and rate limiting. Drop
Decentralized CAPTCHA for enhanced web security
Related tags
Frequently asked questions
How many open source bot-detection projects are there?
This registry tracks 7 projects tagged bot-detection, with 68,309 GitHub stars between them. The most-adopted is CloakBrowser at 31,528 stars.
Are these bot-detection projects free to use?
Yes — 7 of the 7 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which bot-detection project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these bot-detection projects still maintained?
7 of the 7 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.