Home / Technologies / Clerk / Alternatives
Clerk alternatives
The 36 most used alternatives to Clerk, ranked by how many websites run them. Google reCAPTCHA leads with 3,022,685 sites; Clerk itself is on 8,695.
| # | Tool | Websites | Also run Clerk | ||
|---|---|---|---|---|---|
| 1 | Google reCAPTCHA | 3,022,685 | 31 | Compare | |
| 2 | Akismet | 261,350 | 0 | Compare | |
| 3 | Cloudflare Turnstile | 179,597 | 46 | Compare | |
| 4 | Wordfence | 167,669 | 0 | Compare | |
| 5 | CleanTalk | 138,386 | 0 | Compare | |
| 6 | TrustedSite | 106,398 | 0 | Compare | |
| 7 | Sign in with Google | 100,909 | 10 | Compare | |
| 8 | hCaptcha | 60,804 | 1 | Compare | |
| 9 | Imperva Incapsula | 25,436 | 0 | Compare | |
| 10 | ALTCHA | 14,952 | 0 | Compare | |
| 11 | Sift | 14,510 | 0 | Compare | |
| 12 | Friendly Captcha | 12,799 | 0 | Compare | |
| 13 | HUMAN (PerimeterX) | 12,350 | 0 | Compare | |
| 14 | Fingerprint | 10,239 | 1 | Compare | |
| 15 | Firebase Authentication | 7,333 | 1 | Compare | |
| 16 | Sign in with Apple | 6,514 | 0 | Compare | |
| 17 | DataDome | 4,794 | 1 | Compare | |
| 18 | SiteLock | 4,332 | 0 | Compare | |
| 19 | DigiCert Site Seal | 2,810 | 0 | Compare | |
| 20 | Azure AD B2C | 2,530 | 0 | Compare | |
| 21 | GeeTest | 2,421 | 0 | Compare | |
| 22 | Amazon Cognito | 2,019 | 0 | Compare | |
| 23 | Kasada | 1,113 | 88 | 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 Clerk 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 Clerk?
Some do. The "also run Clerk" 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.
Want the whole list?
Sign up to download every site using Clerk or its alternatives as a spreadsheet and see new ones as they appear. 200 free credits to start. No card needed.