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Top 23 Java Oauth2 Projects
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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Project mention: Energy-Efficient Schema-Driven Development with Spring WebMVC/WebFlux | dev.to | 2025-04-20
In Spring WebMVC/WebFlux, you can use springdoc-openapi to automatically generate an OpenAPI schema from Spring controller implementations. Having an OpenAPI schema enables automatic generation of HTML documentation and client code, which already provides some value.
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Project mention: CloudFoundry User Account and Authentication (UAA) Server | news.ycombinator.com | 2024-12-04
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Sevalla
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keycloak-config-cli
Import YAML/JSON-formatted configuration files into Keycloak - Configuration as Code for Keycloak.
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OpenAM
OpenAM is an open-source access management solution for identity authentication, authorization, and federation. It provides single sign-on, adaptive authentication, and centralized policy control, enabling secure access to web, mobile, and cloud applications
Project mention: Using LLM in Access Management with OpenAM and Spring AI as an example | dev.to | 2025-06-30We will use an open-source solution OpenAM (Open Access Manager) with its default configuration as the access control system.
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product-is
Welcome to the WSO2 Identity Server source code! For info on working with the WSO2 Identity Server repository and contributing code, click the link below.
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java-microservices-examples
Java Microservices: Spring Boot, Spring Cloud, JHipster, Spring Cloud Config, and Spring Cloud Gateway
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jans
The Janssen Project is a home for open source IAM components, featuring Auth Server (OAuth/OpenID), Agama low-code identity orchestration, and the Cedarling policy decision point. The "Janssen Server" distributions bundle IAM components under one control plane.
Project mention: OpenAI uses open source Ory to authenticate over 400M weekly active users | news.ycombinator.com | 2025-03-20No worries! I get it.
You should add Gluu/Janssen to your list; they are a venerable open source OIDC implementation: https://github.com/JanssenProject/jans
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Firefly
Firefly is an asynchronous web framework for rapid development of high-performance web application. (by hypercube1024)
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spring-security-oauth2-sample
This module is based on Spring Authorization Server and contains information on using Spring Security OAuth2
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iridium
An OIDC provider integrator. Choose your social providers without needing to write code. (by IridiumIdentity)
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booking-microservices-java-spring-boot
A practical distributed system, built with Java Spring Boot, Vertical Slice Architecture, Event Driven Architecture, CQRS, DDD, gRpc, MongoDB and RabbitMq.
Project mention: Java Spring Boot Microservices with Vertical Slice and Event-Driven Architecture | news.ycombinator.com | 2025-01-26 -
spring-oauth2-easyplus
App-Token based fully extended and extensible JPA implementation of Spring Security 6 + Spring Authorization Server
Project mention: Spring Oauth2 - App-Token based Hybrid Token Verification Methods | dev.to | 2025-01-12 -
reactify-core
Java library for developing reactive programming(reactor-core) backend systems in microservices
Project mention: Introducing Java Library for Backend Microservice Webflux (Reactor-core) | dev.to | 2025-01-11Link github: https://github.com/hoangtien2k3/reactify-core
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java Oauth2 discussion
Java Oauth2 related posts
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Spring Oauth2 - App-Token based Hybrid Token Verification Methods
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Introducing Java Library for Backend Microservice Webflux (Reactor-core)
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How to Build an Elm Land Project for Production
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OAuth 2 for SWEs working on AuthZ systems
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Nidam Registration VS Keycloak - a user suggested alternative
2 projects | 19 May 2024 -
nonce issue for signInWithIdToken
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My first commercial release of Iridium!!
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A note from our sponsor - Sevalla
sevalla.com | 1 Sep 2025
Index
What are some of the best open-source Oauth2 projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | cas | 11,183 |
| 2 | scribejava | 5,466 |
| 3 | springdoc-openapi | 3,523 |
| 4 | AppAuth-Android | 3,093 |
| 5 | uaa | 1,629 |
| 6 | react-native-inappbrowser | 1,377 |
| 7 | Simple Java Mail | 1,263 |
| 8 | keycloak-config-cli | 956 |
| 9 | OpenAM | 842 |
| 10 | product-is | 804 |
| 11 | java-microservices-examples | 585 |
| 12 | jans | 561 |
| 13 | Membrane Service Proxy | 491 |
| 14 | Firefly | 297 |
| 15 | generic-oauth2 | 262 |
| 16 | spring-security-oauth2-sample | 225 |
| 17 | iridium | 121 |
| 18 | spring-oauth-server | 85 |
| 19 | booking-microservices-java-spring-boot | 55 |
| 20 | spring-oauth2-easyplus | 32 |
| 21 | reactify-core | 25 |
| 22 | graylog-plugin-oauth2 | 16 |
| 23 | spring-resource-server | 14 |
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