🆚 Clerk vs. Keycloak

Compare technologies based on real-world usage data *
Clerk
Keycloak
Type
Authentication service
Authentication service
About
Clerk is an authentication and user management service for Next.js, Remix, Nuxt, React, Vue, and other frameworks.
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
clerk.com #60,139
keycloak.org #48,832
Pricing
Free version ✔️10K monthly active users (MAUs)
Pro$25+/month
Free ✔️Open source
Categories
Authentication › Rank #17
Authentication › Rank #8
Popularity

Determined by the number of sites using each technology.

The Keycloak authentication service is 6 times more popular than Clerk.
Total websites
Market share
Authentication
Popularity by country

Determined by the number of sites detected from each country.

Keycloak is more popular than Clerk in all countries.
United States
Colombia
Germany
Switzerland
France
Austria
Denmark
Russia
United Kingdom
Brazil
Awards
Popularity by domain category

Determined by the number of sites in each category.

Keycloak is more popular than Clerk in all market segments.
Business
Marketing/Merchandising
General News
Internet Services
Sports
Real Estate
Software/Hardware
Government/Military
Entertainment
Education/Reference
Top sites

Top-ranked sites that use these technologies.

Name
Rank
#273
#9,487
#21,861
#53,080
#60,139
Name
Rank
#2,319
#5,365
#5,995
#6,280
#6,821
Compare alternatives

Technologies with similar characteristics.

See also

Data updated

* 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.

When interpreting and using the results, please read our methodology and disclaimer.