Friendly Captcha

Friendly Captcha is a hosted CAPTCHA service for websites and apps. A site adds the Friendly Captcha widget to a form, and the widget solves a proof-of-work puzzle for each visitor’s device in the background while the visitor fills in the form, so the visitor is not shown a challenge to complete. The service is run by Friendly Captcha GmbH from Germany and states that it uses no cookies and stores no personal data from users.

Worth knowing

The Starter plan limits requests per month, and paid plans raise those limits and the number of protected domains. A free CAPTCHA is offered for non-commercial websites with low traffic. The Enterprise plan adds a self-hosted endpoint option. The open source integrations for React, Vue and Angular are published separately from the hosted service.