Open Source CAPTCHA & Bot Protection Tools using Esbuild
A curated collection of the best open source tools for distinguishing humans from bots (CAPTCHA) and preventing spam. using Esbuild.
Decentralized CAPTCHA for enhanced web security
Stars
303Last commit
15 hours agoLicense
Apache-2.0
A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.
Open Source Alternative to:
GDPR-compliant bot protection without user friction
Stars
197Last commit
7 hours agoLicense
Unknown
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic protection.
Open Source Alternative to:
Invisible bot protection that respects user privacy
Stars
37Last commit
1 month agoLicense
MPL-2.0
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Open Source Alternative to:
Access control for AI agents your customers log in with
Stars
19Last commit
9 days agoLicense
BUSL-1.1
Detects AI agents using customer credentials, masks private fields, holds risky actions for passkey approval, and signs every decision on your own server.
Open Source Alternative to:
Stellar Hosted – Managed Open Source software hosting in the EU: secure, compliant, fast.
Windshift