⚡ Authentication

Authentication services enable developers to integrate third-party authentication into their websites and applications, allowing users to sign in with accounts from identity providers such as Google, Facebook, Apple, Microsoft, and Discord.

According to our statistics, authentication services are detected on 0.6% of all websites.
90.7% of these sites use only one authentication service, 8.3% use two, and 1% use three or more of them.

⭐ Most Popular in 2025

The following chart shows the leading authentication services in 2025, based on market share.

The most popular is Google Identity with an impressive share of 42.1%, followed by Facebook Login with 13.5% and Google Sign-In with 12%.

Google Identity 42.1%
Facebook Login 13.5%
Google Sign-In 12%
Auth0 7.5%
Sign In with Apple 5.8%
Microsoft Identity Platform 4.3%
Amazon Cognito 4.3%
Keycloak 3.4%
Supabase 2.9%
Firebase Authentication 2.8%
Okta 2.6%
Microsoft Entra ID 1.8%
Auth.js 1.4%
ClassLink 1.4%
Netlify Identity 1.4%

You can also drill down by country:

🚀 Country Highlights

Here is a list of services that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

Auth0 is #2 in the United States ^(-2)

✨ Best Authentication Services

Below is a more detailed list of all authentication services we track, ranked by their market share.

Rank	Name	Market share
1	Google Identity Mountain View, California, United States A suite of services and APIs from Google that handles user sign-up, sign-in, and authorization across web and mobile apps. Free	42.1%
2	Facebook Login Menlo Park, California, United States A convenient way for Facebook's billions of global users to log into your app or website. Free	13.5%
3	Google Sign-In Mountain View, California, United States A deprecated JavaScript library that has been superseded by Google Identity Services for Web. FreeLegacy	12%
4	Auth0 San Francisco, California, United States A cloud-based identity and authentication management platform that allows developers to add authentication to their applications. Free$35+/month	7.5%
5	Sign In with Apple Cupertino, California, United States A service provided by Apple that allows users to sign in to apps and websites using their Apple IDs. $99/year	5.8%
6	Microsoft Identity Platform Redmond, Washington, United States A cloud identity service that allows your users and customers to sign in to your applications using their Microsoft identities or social accounts. Free$6+/user/month	4.3%
7	Amazon Cognito Seattle, Washington, United States A user identity service by Amazon Web Services that lets you add user sign-up, sign-in, and access control to your web and mobile apps. Free tier$$$	4.3%
8	Keycloak San Francisco, California, United States An open-source identity and access management solution that provides user federation, strong authentication, user management, fine-grained authorization, and more. FreeOpen source	3.4%
9	Supabase Singapore An open-source backend-as-a-service platform based on PostgreSQL. FreeOpen source$25+/month	2.9%
10	Firebase Authentication Mountain View, California, United States A complete backend solution for signing in with passwords, federated identity providers, email links, and text messages. Free$0.0055+	2.8%
11	Okta San Francisco, California, United States A cloud-based identity and access management platform built around a centralized directory of user and customer profiles. $1,500+/year	2.6%
12	Microsoft Entra ID Redmond, Washington, United States A cloud-based identity and access management solution. Free$6+/user/month	1.8%
13	Auth.js An open source authentication solution that integrates with Next.js, Nuxt, Qwik, and other modern JavaScript frameworks. FreeOpen source	1.4%
14	ClassLink Clifton, New Jersey, United States An identity and access management solution for education that provides secure authentication methods, including multi-factor authentication, data encryption, and regular third-party security audits. $$$	1.4%
15	Netlify Identity San Francisco, California, United States A plug-and-play microservice for handling site functionalities like signups, logins, password recovery, user metadata, and roles. $99+/month	1.4%
16	Sign In with LinkedIn Mountain View, California, United States An authentication service that allows sites and applications to use the LinkedIn sign-in feature. Free	1.3%
17	Clerk San Francisco, California, United States An authentication and user management service for Next.js, Remix, Nuxt, React, Vue, and other frameworks. Free$25+/month	0.7%
18	Shibboleth Bristol, United Kingdom A SAML-based single sign-on web application that is widely used in academic organizations. FreeOpen source€2,750+/year	0.5%
19	Login with Discord San Francisco, California, United States User authentication with Discord credentials. Free	0.4%
20	Telegram Login Dubai, United Arab Emirates An easy way to authorize users on your website via the Telegram instant messenger. Free	0.3%

Data is based on the analysis of 2,764,714 websites.
Statistics were last calculated on December 28, 2025.
For details, see our methodology and disclaimer.