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Cloudflare Turnstile
Free Cloudflare CAPTCHA replacement — invisible by default, 1M challenges/mo on free tier.
Free tier: free up to 1,000,000 challenges/mo; bundled with Cloudflare paid plans for higher
What it does well
- Extremely generous free tier offers one million challenges per month.
- Invisible by default, improving user experience by avoiding puzzles.
- Simple client-side and server-side integration with clear documentation.
- Provides basic analytics on challenge pass/fail rates and issued tokens.
Where it falls short
- Configuration options are minimal compared to enterprise-grade bot management solutions.
- Effectiveness is dependent on Cloudflare's private, proprietary detection methods.
- Requires an active internet connection to Cloudflare's servers to function.
- No self-hosted deployment option; you are tied to the Cloudflare cloud.
Alternatives to Cloudflare Turnstile
hCaptcha
freemiumPrivacy-focused captcha alternative to reCAPTCHA — free Basic, paid Enterprise / Pro.
Google reCAPTCHA Enterprise
freemiumGoogle's enterprise captcha + risk scoring — first 10K assessments/mo free, $1/1K above.
GuardLabs Anti-Fraud
paidReferral / signup antifraud pipeline — Turnstile + 9 automated checks + 14-day hold + admin queue. From $99 one-time.
Stripe Radar
freemiumBuilt-in fraud scoring for Stripe payments — free with standard fees, $0.02/transaction add-on for custom rules.