Cap is a fast, lightweight, and modern open-source CAPTCHA alternative based on SHA-256 proof-of-work (PoW). It’s 250x smaller than hCaptcha, privacy-focused, fully customizable, and easy to self-host. Cap helps prevent spam and abuse without tracking users, making it ideal for privacy-conscious developers. Built for speed and simplicity, Cap is perfect for modern web apps, forms, and APIs that need secure, lightweight human verification.



Free
Launch Team / Built With

AWS Startup AdvisorPersonalized AWS guidance that meets you where you’re already building
Promoted



We'll use this, looks so good and modern. Can we customize the style?
@migma yep! everything is customizable through css variables
I like the lightweight and privacy-focused approach! 😄
That looks great!
@neelptl2602 thank you!
Congrats on the launch, looks great!
really cool. upvoted
👏👏
Look's cool!