⚡ Authentication Services

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, and Apple.

They typically handle user registration, login, and password recovery, and may support social logins, enterprise single sign-on, multi-factor authentication, and administrative controls for managing users at scale.

According to our statistics, authentication services are detected on 0.9% of all websites.
92% of these sites use only one authentication service, 7.2% use two, and 0.7% use three or more of them.

Statistics based on 3.8M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading authentication services in 2026, based on market share.

The most popular is Google Identity with an impressive share of 44.2%, followed by Facebook Login with 10.3% and Google Sign-In with 9.1%.

Google Identity 44.2%
Facebook Login 10.3%
Google Sign-In 9.1%
Supabase 9%
Auth0 5.3%
Sign In with Apple 5%
Microsoft Identity Platform 4.6%
Amazon Cognito 3.9%
Firebase Authentication 3.1%
Keycloak 2.8%
Okta 2.1%
ClassLink 1.8%
Auth.js 1.6%
Microsoft Entra ID 1.6%
Clerk 1.3%

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.

Keycloak is #1 in Colombia ^(-9)
Facebook Login is #1 in Israel ^(-1)
Sign In with Apple is #1 in Korea ^(-5)
Supabase is #1 in Sweden ^(-3)
Microsoft Identity Platform is #1 in Norway ^(-6)
Amazon Cognito is #2 in the United Kingdom ^(-6)
Google Sign-In is #2 in India ^(-1)
ClassLink is #3 in the United States ^(-9)
Auth0 is #3 in Australia ^(-2)
Telegram Login is #3 in Russia ^(-17)

✨ Best Authentication Services

Below is a more detailed list of 20 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	44.2%
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	10.3%
3	Google Sign-In Mountain View, California, United States A deprecated JavaScript library that has been superseded by Google Identity services for Web. FreeLegacy	9.1%
4	Supabase Singapore An open-source backend-as-a-service platform based on PostgreSQL. FreeOpen source$25+/month	9%
5	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	5.3%
6	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%
7	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	4.6%
8	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$$$	3.9%
9	Firebase Authentication Mountain View, California, United States A backend authentication service that enables applications to sign in users using email and password, third-party identity providers, email links, and phone numbers. Free tier$$$	3.1%
10	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	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	2.1%
12	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. $$$	1.8%
13	Auth.js San Francisco, California, United States An open-source authentication solution that integrates with Next.js, Nuxt, Qwik, and other modern JavaScript frameworks to handle user sign-in, session management, and access control. FreeOpen source	1.6%
14	Microsoft Entra ID Redmond, Washington, United States A cloud-based identity and access management solution. Free$6+/user/month	1.6%
15	Clerk San Francisco, California, United States An authentication and user management service for Next.js, Remix, Nuxt, React, Vue, and other frameworks that provides prebuilt interfaces and APIs to handle user identity, sessions, and access control. Free$25+/month	1.3%
16	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%
17	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	0.9%
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	0.3%
20	Telegram Login Dubai, United Arab Emirates An easy way to authorize users on your website via the Telegram instant messenger. Free	0.2%

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,829,031 websites.
We currently track the presence of 20 authentication services across the web.
Statistics were last calculated on October 9, 2026.
For more details, see our methodology and disclaimer.