🆚 Auth.js vs. Keycloak

Compare technologies based on real-world usage data *

Type

Authentication service
Authentication service

About

Auth.js is 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.

It supports OAuth 2.0 and OpenID Connect providers, passwordless email authentication, and passkeys via WebAuthn, and can manage sessions using JSON Web Tokens or database adapters for MySQL, PostgreSQL, MongoDB, and SQLite.

Keycloak is an open-source identity and access management solution that provides user federation, strong authentication, user management, fine-grained authorization, and more.

Headquarters

San Francisco, California, United States
San Francisco, California, United States

Website

Pricing

Free ✔️Open source
Free ✔️Open source

Categories

Authentication › Rank #14
Authentication › Rank #9
JavaScript Libraries › Rank #255

Popularity

Determined by the number of sites using each technology.

The Keycloak authentication service is 2.2 times more popular than Auth.js.
Total websites

Market share

Authentication

Popularity by country

Determined by the number of sites detected from each country.

Keycloak is more popular in the United States, Colombia, and Germany, while Auth.js is more popular in Brazil, Japan, and Indonesia.
United States
Colombia
Germany
France
Switzerland
Denmark
Austria
Norway
Russia
United Kingdom

Awards

Popularity by domain category

Determined by the number of sites in each category.

Keycloak is more popular among sites focused on business, marketing and merchandising, and general news, while Auth.js is more commonly used on online shopping, job search, and games sites.
Business
Marketing/Merchandising
Online Shopping
General News
Entertainment
Sports
Travel
Internet Services
Software/Hardware
Real Estate

Top sites

Top-ranked sites that use these technologies.

Name
Rank
#8,298
View more ➝
Name
Rank
#2,653
#2,907
#3,551
View more ➝

See also

* According to recent studies, many of online reviews are fake.
When making your decision, it is better to rely on data that cannot be falsified.
Our service evaluates the popularity of technologies by the number of websites using them.

Statistics were last calculated on .
For details, see our methodology and disclaimer.