🆚 Auth.js vs. Firebase Authentication
- 📈 Firebase Authentication is twice as popular as Auth.js.
- 🌎 Firebase Authentication is more popular in the United States, India, and Germany.
- 🌍 Auth.js is more popular in Austria, Norway, and Russia.
Auth.js
Firebase AuthenticationType
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.
Firebase Authentication is a backend authentication service that enables applications to sign in users using email and password, third-party identity providers, email links, and phone numbers.
It offers sign-in with services such as 
Google, 
Facebook, 
Apple, and 
GitHub, provides ready-made UI components and SDKs for web, iOS, Android, and 
Unity, supports anonymous accounts, and includes phone and multi-factor authentication if used with Identity Platform.
Headquarters
Pricing
(email, phone, social)
(OpenID Connect, SAML)
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
Awards
- ⬆️ 241st most popular in the United States in the JavaScript Libraries category.
- ⭐ 4th most popular in India in the Authentication category.
- ⭐ 5th most popular in Australia in the Authentication category.
- ⭐ 5th most popular in Canada in the Authentication category.
Popularity by domain category
Determined by the number of sites in each category.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Auth0
Supabase
Keycloak
Clerk
Microsoft Identity Platform
Sign In with LinkedIn
Google company profile🗃️ 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 3,363,931 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.