SpiceDB vs Warrant
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | SpiceDB | Warrant |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 91 · Excellent | 39 · At risk |
| Category | Identity & SSO | Identity & SSO |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Go |
| Setup difficulty | Hard | Medium |
| Min. RAM | 512 MB | 256 MB |
| Deployment | docker, kubernetes, binary | docker, binary |
| GitHub stars | ★ 7,086 | ★ 1,337 |
| First released | 2021 | 2022 |
| Replaces | Auth0 FGA, OpenFGA | Auth0 FGA |
What are SpiceDB and Warrant?
SpiceDB
SpiceDB is an open-source database system for managing security-critical application permissions inspired by Google Zanzibar. It is self-hosted to provide consistent, fine-grained authorization at scale.
- Zanzibar-inspired model
- Consistency guarantees
- Schema language
- Horizontal scaling
Warrant
Warrant is an open-source, centralized authorization service for defining and enforcing fine-grained, relationship-based access control across applications. It is self-hosted with REST and SDK access.
- Relationship-based access control
- Centralized policy service
- REST API and SDKs
- Self-hostable
SpiceDB vs Warrant: key differences
Both projects are written in Go. Warrant is the lighter option, starting around 256 MB of RAM against 512 MB for SpiceDB. SpiceDB has the considerably larger community, at 7,086 GitHub stars versus 1,337.
Why pick each one
Choose SpiceDB if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
- Mature project with 7.1k GitHub stars
Choose Warrant if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Active community (1.3k GitHub stars)
- Written in Go
Frequently asked questions
Is SpiceDB or Warrant better?
Neither is universally better. SpiceDB has the larger community, while Warrant is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are SpiceDB and Warrant free and open-source?
Yes. SpiceDB is licensed under Apache-2.0 and Warrant under Apache-2.0. Both can be self-hosted at no software cost.
Can I run SpiceDB and Warrant with Docker?
SpiceDB: yes. Warrant: yes.
Which is lighter on resources, SpiceDB or Warrant?
Warrant has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for SpiceDB. Real-world usage depends on library size, user count, and enabled features.