#1
Anubis is a lightweight web AI firewall that protects sites from AI crawlers and scraping bots using configurable request challenges and bot policies.
21.7k stars693 forksMITlast commit Actively maintained
4 self-hosted hCaptcha alternatives
hCaptcha is a CAPTCHA and bot-detection SaaS that provides challenge-based human verification, risk scoring and bot mitigation for websites and apps, offering privacy-focused data handling, analytics and integration options.
Alternatives to hCaptcha
#2
Lightweight, self-hostable CAPTCHA alternative using SHA-256 proof-of-work challenges to protect forms and APIs from bots without tracking or visual puzzles.
7.6k stars551 forkslast commit Actively maintained
#3
Accessible, rule-based spam protection for web forms that inspects form fields, stores minimal data encrypted, and auto-deletes entries after 14 days.
305 stars17 forksMITlast commit Actively maintained
Privacy-first, GDPR-focused self-hosted Proof-of-Work CAPTCHA for forms and APIs with an adaptive lightweight widget and Postgres/ClickHouse backend.
187 stars7 forkslast commit Actively maintained
What replacing hCaptcha actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 4 of 4 shipped a commit in the last six months. Licences in this list: MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in Moderation & Anti-Spam Tools.
