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ALTCHA alternatives
The 36 most used alternatives to ALTCHA, ranked by how many websites run them. Google reCAPTCHA leads with 3,022,685 sites; ALTCHA itself is on 14,952.
| # | Tool | Websites | Also run ALTCHA | ||
|---|---|---|---|---|---|
| 1 | Google reCAPTCHA | 3,022,685 | 210 | Compare | |
| 2 | Akismet | 261,351 | 32 | Compare | |
| 3 | Cloudflare Turnstile | 179,597 | 27 | Compare | |
| 4 | Wordfence | 167,669 | 15 | Compare | |
| 5 | CleanTalk | 138,386 | 6 | Compare | |
| 6 | TrustedSite | 106,398 | 0 | Compare | |
| 7 | Sign in with Google | 100,909 | 14 | Compare | |
| 8 | hCaptcha | 60,804 | 28 | Compare | |
| 9 | Imperva Incapsula | 25,436 | 1 | Compare | |
| 10 | Sift | 14,510 | 1 | Compare | |
| 11 | Friendly Captcha | 12,799 | 28 | Compare | |
| 12 | HUMAN (PerimeterX) | 12,350 | 0 | Compare | |
| 13 | Fingerprint | 10,239 | 330 | Compare | |
| 14 | Clerk | 8,695 | 0 | Compare | |
| 15 | Firebase Authentication | 7,333 | 1 | Compare | |
| 16 | Sign in with Apple | 6,514 | 1 | Compare | |
| 17 | DataDome | 4,794 | 0 | Compare | |
| 18 | SiteLock | 4,332 | 1 | Compare | |
| 19 | DigiCert Site Seal | 2,810 | 0 | Compare | |
| 20 | Azure AD B2C | 2,530 | 0 | Compare | |
| 21 | GeeTest | 2,421 | 1 | Compare | |
| 22 | Amazon Cognito | 2,019 | 0 | Compare | |
| 23 | Kasada | 1,113 | 0 | Compare | |
| 24 | ThreatMetrix | 683 | 0 | Compare | |
| 25 | Forter | 585 | 0 | Compare | |
| 26 | iovation | 495 | 0 | Compare | |
| 27 | Okta | 468 | 0 | Compare | |
| 28 | MTCaptcha | 387 | 0 | Compare | |
| 29 | Magic | 376 | 0 | Compare | |
| 30 | AWS WAF | 363 | 0 | Compare | |
| 31 | Kount | 169 | 0 | Compare | |
| 32 | SEON | 169 | 0 | Compare | |
| 33 | Descope | 32 | 0 | Compare | |
| 34 | Arkose Labs | 19 | 0 | Compare | |
| 35 | Stytch | 9 | 0 | Compare | |
| 36 | Cloudflare Access | 7 | 0 | Compare |
Counts are websites whose homepage code loads the tool, in StackGrep's latest crawl.
Questions
What is the most popular ALTCHA alternative?
Google reCAPTCHA, on 3,022,685 websites in our index. The table ranks every alternative we track by sites using it.
Do sites switch from ALTCHA?
Some do. The "also run ALTCHA" column counts sites that load both: often a switch in progress. Each tool's page lists its sites, and with an account you can download them.
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