Authlib
JavaScript Object Signing and Encryption draft implementation.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Verified · Jul 12, 2026Overview
What is Authlib?
Authlib is a library that provides an implementation of the OAuth2 and OpenID Connect specifications. It supports both client and server-side functionalities, making it useful for developers working on authentication and authorization systems.
Key differentiator
“Authlib stands out as one of the most comprehensive libraries for implementing OAuth2 and OpenID Connect in Python, offering both client-side and server-side functionalities.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
API requires Python-specific patterns, TypeScript SDK is community-maintained
v0.1 to v0.2 migration required rewriting chain definitions
Primary development focus is on Python, with minimal official support for other languages
Extensive customization options can lead to a steep initial setup process
Fit analysis
Who is it for?
✓ Best for
Python developers building OAuth2 and OpenID Connect compliant services
Teams needing a robust library for handling client-side OAuth flows
Projects requiring both server and client implementations of OAuth2
✕ Not a fit for
Developers looking for a full-service authentication platform with a UI
Projects that require support for languages other than Python
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Alternatives
Works well with
Next step
Get Started with Authlib
Step-by-step setup guide with code examples and common gotchas.