Friendly Captcha
Product brand
UnclaimedFriendly Captcha is a privacy-first, invisible CAPTCHA alternative that protects websites and apps from bots and spam using proof-of-work mechanisms and advanced risk signals.
Last updated September 16, 2026
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Overview
Friendly Captcha is a privacy-compliant and accessible alternative to traditional CAPTCHAs. It uses proof-of-work mechanisms and advanced risk signals to defend websites and online services from bots and spam without tracking users or requiring them to complete labeling tasks. The company was co-founded in 2020 by Benedict Padberg and Guido Zuidhof and is headquartered in the Munich area with a distributed team across the globe.
History
Friendly Captcha was co-founded in 2020 by Benedict Padberg and Guido Zuidhof after they experienced the limitations of traditional CAPTCHAs. The company is headquartered in the Munich area and has a distributed team across the globe. It positions itself as a leading provider of modern bot protection for online interactions, pioneering invisible CAPTCHA technology based on proof-of-work.
Products and positioning
Privacy-first bot protection; accessible, privacy-compliant CAPTCHA alternative
Invisible CAPTCHA
A truly invisible CAPTCHA based on proof-of-work that checks the end user's device in the background without prompting any visible challenge.
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