Batteries-Included
Authorization
with the freedom to extend, shape, and tweak as you need
For teams that are past rolling their own authorization
A Library
Get started fast
Pull Oso from your favorite package manager, add it to your application, and you are ready to start enforcing authorization over API requests, data fetches, and UI components.
Learn about the library.svg)
Batteries-Included
Stand on the shoulders of giants
You don't have to reinvent how to model roles and relationships, or how to architect your system. We give you the mental model and best practices and make them available via APIs, helper methods and guides.
Learn about our APIsA Policy Language
Add permissions features and stay future-proof
Write your own policies to reflect the nuances of your use case. Be confident that you are in control and can customize anything you need because Oso is backed by a declarative policy language.
Explore the Oso Policy Language
Authorization Academy
Learn authorization best practices
Read a series of technical guides that explains how to build authorization into an app, including architecture, modeling patterns, enforcement, and more — whether you use Oso or not.
Browse the Guides
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Loved by Developers
Karan Talati, CEO
First Resonance
First Resonance
“We love Oso because it lets us manage the chaos of access. We got up to speed in 1 week and into production in 3 weeks with 1 engineer.”
Gaurub Pandey, CTO
Dhi
Dhi
“Oso is awesome. It has made it much easier to express anything we need in our EHR application. It sped up our authZ roadmap 4x.
Simen A. W. Olsen, CDO
Bjerk
Bjerk
“Most libraries I'd used for authorization were not up to par with what I was used to – until I tried Oso.”
KC Chintalapati, Engineer
Fiddler
Fiddler
"Oso was the fastest path to building roles and has been incredible – easy to wrap our heads around, great docs, and makes life much simpler."
William Hayes, CSO
BioDati
BioDati
"Brilliant engineering. Helps guide one through what seems like a simple thing but never is."
Rex Raphael, Engineer
Sanity.io
Sanity.io
"If you need authorization in your Rust project check out Oso. It's really the best I've seen!"
Mike Dearman, Engineer
Undisclosed
Undisclosed
"I've really appreciated the teamwork and honestly, quick turnaround vs. other vendors and projects."
Shaun Verch, Engineer
PlanetScale
PlanetScale
“I love how easy Oso makes it to get started, then do more complex things as you go.”
Let's see some code.
