Auth Tools

1. Google Sign-In runs on more than half of the sites using an auth tool (62%), 3.7 times as many sites as Clerk.
2. Only 7 of the 172 auth tools we track run on more than 1% of these sites.
3. Among sites launched in September, Privy rose to #6 from #10 in August.

#	Movement	Tool	Country	Share	Bar	Sites	90 days
1	–	Google Sign-In Google Identity Services sign-in.		62%		101,858
2	▲1	Clerk Drop-in authentication and user management service for React, Next.js, and other modern frontends.		17%		27,329
3	▼1	Auth.js Auth.js (formerly NextAuth.js v4, rebranded as Auth.js v5): open source authentication library for Next.js / SvelteKit / SolidStart / Express.		16%		25,640
4	–	Google Identity Platform Authentication service providing sign in, federation and user management, also used by Firebase Authentication.		2.3%		3,727
5	▲4	Privy Web3 wallet infrastructure and authentication platform powering 120M+ accounts		1.1%		1,749
6	▼2	Google OAuth Sign-in-with-Google identity flow, lets sites authenticate users via their Google account.		1.0%		1,692
7	–	Stytch Developer-focused authentication and identity platform.		1.0%		1,645
8	▼2	Apple Sign In Federated authentication that lets people sign in to apps and websites with their Apple ID.		0.9%		1,547
9	▲1	Netlify Identity Open-source identity and user authentication service used with Netlify Identity.		0.9%		1,408
10	▼1	O OTPless Passwordless authentication service for OTP-free login via WhatsApp, Gmail and other channels		0.6%		930
11	▲2	AWS Cognito Amazon Web Services managed user authentication, authorisation, and identity service.		0.3%		464
12	▼1	M Microsoft Authentication Library Microsoft Authentication Library (MSAL): Microsoft Entra ID sign-in browser library.		0.3%		455
13	▲1	M Microsoft Entra ID Microsoft's cloud identity service providing single sign-on, multi-factor authentication and customer identity management.		0.2%		367
14	▼3	Auth0 Identity-as-a-service platform from Okta offering social login, SSO, and user management for web and mobile apps.		0.2%		298
15	▲1	Better Auth TypeScript authentication framework for Node.js.		0.2%		264

Share is of the 163,410 sites using an auth tool; a site can use more than one. Arrows compare each tool's rank among sites launched in September with August. The line is its share of new sites over 90 days. Showing the top 15 of 172.

Watches, exports and the API give you every auth tool and the sites using each, from £15 a month.

Other kinds of tool most often found on the same sites, leaving out the plumbing every site has (DNS, CDN, hosting).

• Framework 9,662
• Analytics 9,240
• CSS Framework 9,206
• Meta Framework 8,552
• UI Library 5,952
• Transactional Email 4,867