Top 12 Open-Source Alternatives to Firebase Authentication

Product categories

Authentication Authorization Cyber Security Development Endpoint Security Identity And Access Management Identity Provider Membership Management Multi-factor Authentication SAML SSO Two Factor Authentication

Summary

The top open-source alternatives to Firebase Authentication are Auth0, Spring Security, and Keycloak. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Auth0 Landing Page
1

Auth0

Auth0 is a program for people to get authentication and authorization services for their own business use.
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO 175 social mentions
Spring Security Landing Page
2

Spring Security

The Spring portfolio has many projects, including Spring Framework, Spring IO Platform, Spring Cloud, Spring Boot, Spring Data, Spring Security...
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #Two Factor Authentication 8 social mentions
Keycloak Landing Page
3

Keycloak

Open Source Identity and Access Management for modern Applications and Services.
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO 4 social mentions
JSON Web Token Landing Page
4

JSON Web Token

JSON Web Tokens are an open, industry standard RFC 7519 method for representing claims securely between two parties.
Pricing:
- Open Source
#Identity Provider #Identity And Access Management #SSO 276 social mentions
OAuth2 Landing Page
5

OA

OAuth2

Application and Data, Application Utilities, and User Management and Authentication
Pricing:
- Open Source
#Identity Provider #Identity And Access Management #SSO
OmniAuth Landing Page
6

OmniAuth

OmniAuth is a flexible authentication system utilizing Rack middleware.
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO
Passport.js Landing Page
7

Passport.js

Simple, unobtrusive authentication for Node.js
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #Authentication 3 social mentions
FusionAuth Landing Page
8

FusionAuth

FusionAuth is a CIAM platform that is 100% free for unlimited users.
Pricing:
- Open Source
- Freemium
- Free Trial
#Authentication #User Management And Authentication #Multi-factor Authentication 29 social mentions
Userbase Landing Page
9

Userbase

Add user accounts & data persistence to your static site.
Pricing:
- Open Source
#Identity Provider #Membership Management #Social Networks 6 social mentions
ZITADEL Landing Page
10

ZITADEL

Identity infrastructure, simplified for you.
Pricing:
- Open Source
- Freemium
- $100.0 / Monthly (1'000 Daily Active Users included)
#Cyber Security #Identity And Access Management #Authentication 15 social mentions
Ory Landing Page
11

Ory

Developer-first Access Management
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO 17 social mentions
Let's Encrypt Landing Page
12

Let's Encrypt

Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
Pricing:
- Open Source
#Identity And Access Management #Security & Privacy #Two Factor Authentication 311 social mentions