Alexis Kestler
Hi there! Have you ever logged into a website using Google, Facebook, LinkedIn, or even Github? Or maybe uploaded files directly from Google Drive or Dropbox? Well, my friend, both are examples of websites accessing your data stored elsewhere. But how do they do this securely, without you handing over your passwords?
That‘s where OAuth comes in! As an IT geek myself, I love how OAuth allows secure delegated access between apps. Let me explain…
Imagine Facebook needs your Google contacts to find friends. Years ago, you‘d give Facebook your Google password – yikes! Now with OAuth, you simply approve limited Google access. This way, apps access your online data without passwords. Pretty cool right?
OAuth is an authorization framework allowing limited, secure delegated access. It enables:
- Logins via Google/Facebook/GitHub
- Direct file uploads from Dropbox/Google Drive
- Access to profiles, contacts, or data in other apps
- API and mobile app security
- User control over permissions
OAuth 2.0 is the most used version. It‘s a key web security standard alongside OpenID Connect.
I want to explore some excellent open source OAuth tools you can implement easily. Their benefits include:
Cost savings – open source OAuth tools are free! Useful for startups or projects with small security budgets.
Code transparency – the open code can be audited for quality and security. Closed source lacks visibility.
Avoid vendor lock-in – open standards mean you can switch OAuth solutions easily. Proprietary systems lock you in.
Support – open source tools have communities fixing bugs and improving features.
Let‘s dive into 8 great options! I‘ll share key details as an analyst and IT advisor to help you choose the right one.
1. SuperTokens
SuperTokens is an open source user login toolkit used by startups like HackerRank and engineering teams at Google, Amazon, Meta etc.
It‘s highly customizable with overrideable components, so you can tailor it to your app needs. Features include:
- Email/password and social OAuth logins
- Passwordless logins
- Prebuilt signup pages
- UI customization options
- Helper functions to build logins fast
SuperTokens simplifies adding proper secure user auth quickly.
2. Cerbos
Cerbos, a scalable open source authorization platform, was named Best API Security of 2022 by BusinessWire.
It centrally manages app authorization logic, working with various identity providers like Okta, Auth0, and Magic. Key features:
- Context-aware role definitions
- Language-agnostic API for any tech stack
- Stateless and self-hosted (serverless, public/private cloud etc)
With Cerbos, you can instantly adjust authorization across apps and implement granular access control.
3. Passport
Passport is a popular open source authentication middleware for Node.js. It authenticates requests using plugin strategies.
Benefits include:
- 500+ auth strategies (OAuth, OpenID, social logins)
- Persistent sessions
- Dynamic scopes and permissions
- Hooks to handle auth success/failure
- No assumed routes or database
This flexibility allows Node developers granular auth control.
4. Auth.js
Auth.js delivers simple stateless open source auth for frontend devs. It works with Next.js, Svelte, Solid and more.
It supports:
- Email/passwordless/social logins
- OAuth and JSON Web Tokens
- 9 database options (MongoDB, MySQL etc)
- Encrypted tokens and CSRF protection
So with minimal code, frontend developers can add robust industry-standard auth.
5. Keycloak
Keycloak is a full-featured open source identity and access manager. It‘s easy to integrate and built on standards like OAuth 2.0, OpenID Connect and SAML.
It enables single sign-on – one login for multiple apps. Other features:
- Social logins
- User federation
- Admin console for access policies
- User management
By outsourcing identity management to Keycloak, you avoid complex user infrastructure.
6. Apereo CAS
Apereo CAS is a popular open source, standard-based single sign-on platform with 2000+ deployments globally.
It supports 150+ integration protocols including OAuth 2.0, SAML, OpenID Connect, and custom auth flows. Features include:
- Multifactor authentication
- Delegated auth (social logins)
- Password management
- Terms of use
- User impersonation
CAS simplifies centralized SSO and authentication policy across multiple apps.
7. Ory Kratos
Ory Kratos is a cloud-native open source user management system. It‘s written in Go but supports SDKs for any language.
It offers:
- Customizable login, registration and profiles
- Social login support
- Multifactor authentication
- Account recovery and verification
- User management APIs
Ory Kratos allows quick DIY identity and user management for customer IAM.
8. Logto
Logto provides an open source alternative to proprietary giant Auth0 for identity and access management.
It delivers:
- A management API as authentication provider
- SDKs for easy integration
- OAuth and OpenID Connect support
- Social and passwordless logins
- Customizable UI components
So Logto gives you full-stack authentication and authorization at lower cost.
Final Thoughts
Hopefully this overview gives you a starting point to explore open source OAuth solutions!
I aimed to provide more technical and analytical details from my experience as an IT advisor and data geek 🤓. Let me know if you have any other questions!
The key is finding the right fit for your app‘s needs and budget. I‘d be happy to offer more guidance if you describe your specific use case.
Just remember – by implementing OAuth, you keep user data secure. And with open source options, security needn‘t break the bank.
Chat soon!
[Your Name]