Oso

Oso is a Ruby OAuth microservice designed to simplify SAML-based authentication and authorization. It streamlines complex access control requirements with a purpose-built language and intuitive integrations, making your authorization refactor the last one you'll ever need.

Oso is the open source alternative to:

Auth0

About Oso

Oso centralizes your authorization logic with Polar, its custom language built specifically for fine-grained access control. The tool decouples authorization from your business logic, delivering clear, readable policies and robust debugging support. Its flexible architecture supports cloud and local deployments, backed by extensive documentation and real-world testimonials from industry leaders.

Key Features

Purpose-built Polar language for fine-grained access control
Seamless integration with Ruby and SAML-based systems
Centralized, decoupled authorization logic with robust testing and debugging
Flexible deployment options supporting cloud and on-premise environments
Trusted by leading companies for scalable and reliable authorization

Pricing

Developer

$0/Developer

Ideal for developers learning and experimenting with Oso.

Features:

✓Cloud deployment
✓99.5% SLA
✓Community Slack support
✓Up to 5 developers
✓100 monthly active users

Startup

$149/Startup

Designed for growing teams needing basic SLAs for production.

Features:

✓Cloud deployment
✓99.95% SLA
✓Support Mon - Fri, 9am-9pm ET
✓Unlimited developers
✓5 environments
✓1 deployment region
✓1-day log and backup retention
✓Starts with 300 monthly active users

Growth

Tailored for enterprises requiring advanced security, SLAs, and comprehensive support.

Features:

✓Cloud, hybrid, or on-prem deployment
✓99.99% SLA
✓24/7/365 support
✓Unlimited developers
✓Custom number of environments and deployment regions
✓Custom log and backup retention
✓White glove onboarding and tailored features

Migration Services

Expert-led migration to help integrate new authorization features quickly and safely.

Features:

✓One-time fee service
✓De-risk migration process
✓Minimize engineering overhead
✓Guarantee 100% parity with existing systems
✓Accelerate time to production by up to 75%
✓Reduce bugs during migration

Summary

Oso delivers a streamlined solution for SAML-based authentication and granular authorization in Ruby applications. Its developer-centric approach, evident in intuitive tools, robust SLAs, and flexible deployment options, empowers teams to manage access control tasks easily and reliably.

Related Open Source Tools

BoxyHQ

🔥 Streamline your web application's authentication with Jackson, an SSO service supporting SAML and OpenID Connect protocols. Beyond enterprise-grade Single Sign-On, it also supports Directory Sync via the SCIM 2.0 protocol for automatic user and group provisioning/de-provisioning. 🤩

1,970

View tool →

SuperTokens

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

13,910

View tool →

Stack Auth

Open-source Auth0/Clerk alternative

5,285

View tool →

Ory

Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.

11,587

View tool →

Authentik

The authentication glue you need.

15,196

View tool →

Cerbos

Cerbos is the open core, language-agnostic, scalable authorization solution that makes user permissions and authorization simple to implement and manage by writing context-aware access control policies for your application resources.

3,660

View tool →

Hanko

The Complete Authentication and User Management Solution for the Passkey Era. Open Source Alternative to Clerk, Auth0, et al.

7,711

View tool →

Logto

🧑‍🚀 An identity and access management (IAM) infrastructure with authentication, authorization, MFA, SSO, user management, and multi-tenancy features. Supports OAuth 2.0, OIDC, and SAML. No framework restrictions.

9,619

View tool →