Boundary vs Casbin
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Boundary
Identity-based secure access to systems and services
VS
Casbin
Authorization library supporting many access control models
| Feature | Boundary | Casbin |
|---|---|---|
| Category | Identity & SSO | Identity & SSO |
| License | BUSL-1.1 | Apache-2.0 |
| Language | Go | Go |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 128 MB |
| Deployment | docker, binary | source |
| GitHub stars | ★ 4,055 | ★ 20,311 |
| First released | 2020 | 2017 |
| Replaces | Teleport, StrongDM | Auth0 RBAC |
Why pick each one
Choose Boundary if…
- Released under the BUSL-1.1 license
- First-class Docker support for quick deployment
- Active community (4.1k GitHub stars)
- Written in Go
Choose Casbin if…
- Released under the Apache-2.0 license
- Mature project with 20.3k GitHub stars
- Written in Go
- Tiny footprint — runs in 128 MB RAM
Frequently asked questions
Is Boundary or Casbin better?
Neither is universally better. Casbin has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Boundary and Casbin free and open-source?
Yes. Boundary is licensed under BUSL-1.1 and Casbin under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Boundary and Casbin with Docker?
Boundary: yes. Casbin: check the project docs for container support.