#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
2 self-hosted Google reCAPTCHA alternatives
reCAPTCHA is Google's cloud service for bot detection and fraud prevention. It analyzes user behavior, device and network signals to assign risk scores, present challenges, and integrate with web and mobile apps or WAFs to block automated attacks, spam, credential stuffing, and SMS fraud.
Alternatives to Google reCAPTCHA
#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
What replacing Google reCAPTCHA 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. 2 of 2 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 Network Security (VPN, Firewall, WAF).
