Open source anti-bot projects
Every project in the registry tagged anti-bot, ranked by real GitHub adoption.
Open-source IDS/IPS, WAF and bot detection for Linux, Windows, Docker and Kubernetes, with a crowdsourced blocklist of malicious IPs.
Stealth headless browser for AI agents — bypass Cloudflare, bot detection, and anti-scraping. Drop-in Puppeteer/Playwright replacement.
Privacy-first CAPTCHA alternative with proof-of-work
An open source fingerprint browser based on Ungoogled Chromium. 指纹浏览器 隐私浏览器
Next-Gen CAPTCHA and Spam Protection, GDPR compliant
A blazing fast, async-first, undetectable webscraping/web automation framework based on ultrafunkamsterdam/nodriver. Now with Docker support!
Go HTTP client with browser-identical TLS/HTTP2 fingerprinting. Bypass bot detection by perfectly mimicking Chrome, Firefox, and Safari at the cryptographic lev
Self-hosted scraping engine — bypasses any JS challenge & captcha: Cloudflare, Turnstile, reCAPTCHA, hCaptcha, GeeTest. FlareSolverr & Byparr alternative and dr
The fast and secure Load Balancer / API Gateway / Reverse Proxy with built-in service discovery, GeoIP, WAF, bot protection and much more - https://pingoo.io
Open source web infrastructure for AI. Scrape, crawl, and automate the web, clean markdown, browser sessions, ready for your agents.
A skill for AI agents: search the web with SearXNG, browse with Camofox, bypass protections with CloakBrowser. Anti-hallucination by design. Self-hosted, free,
Run any site JavaScript from Python with the real Firefox engine. Headless SpiderMonkey + Necko for automation and scraping.
Selenium that anti-bots cannot see, so no captchas: same API, anti-detect stealth headless Firefox, undetected fingerprint, bypass bot detection, Python web scr
GDPR-compliant bot protection without user friction
Invisible bot protection that respects user privacy
Related tags
Frequently asked questions
How many open source anti-bot projects are there?
This registry tracks 15 projects tagged anti-bot, with 48,984 GitHub stars between them. The most-adopted is crowdsec at 15,431 stars.
Are these anti-bot projects free to use?
Yes — 13 of the 15 carry an explicit open-source licence across 5 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 anti-bot 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 anti-bot projects still maintained?
15 of the 15 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.