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CAPTCHA & Bot Protection
CAPTCHA and bot-detection services.
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Cloudflare Turnstile
Privacy-friendly CAPTCHA alternative.
FreeAPI keyhCaptcha
Bot-detection and CAPTCHA service.
Free tierAPI keyreCAPTCHA
Google's CAPTCHA and bot-risk service.
FreeAPI keyFriendly Captcha
Proof-of-work CAPTCHA that is GDPR-friendly.
PaidAPI keyAltcha
Open-source self-hosted proof-of-work CAPTCHA.
FreeNo authmCaptcha
Open-source proof-of-work CAPTCHA.
FreeNo authArkose Labs
Enterprise bot and fraud challenge platform.
PaidAPI keyDataDome
Real-time bot protection and anti-scraping.
PaidAPI keyCap
Lightweight open-source proof-of-work captcha.
FreeNo authAkamai Bot Manager
Enterprise bot detection and mitigation.
PaidAPI keyImperva Advanced Bot Protection
Bot management and API security.
PaidAPI keyWeb Bot Auth
Cryptographic HTTP message signatures to identify well-behaved bots.
FreeNo auth