Casbin vs AuthZed (SpiceDB)
Side-by-side comparison of identity tools. Sponsored placement is disclosed where applicable.
Quick answer
Casbin vs AuthZed (SpiceDB): which should you choose?
Short answer
Casbin vs AuthZed (SpiceDB) have overlapping use cases in identity and access management. The right pick depends on your company size, deployment model, integrations, and pricing tolerance — compare those attributes side-by-side below.
- Best for
- Casbin: Backend teams that want to embed a fast, model-driven RBAC/ABAC engine directly inside their own services in Go, Java, Node.js, Python, .NET, PHP or Rust without running a separate authorization server. · AuthZed (SpiceDB): Product engineering teams building fine-grained, relationship-based permissions (sharing, hierarchies, multi-tenant B2B) at scale who want Zanzibar semantics without building them.
- When to choose
- Pick the option whose company-size fit, deployment model, and integrations most closely match your stack.
- When not to choose
- Skip a head-to-head if you haven't shortlisted a category yet — start with the IAM Stack Finder instead.
- Related tools & categories
- CasbinAuthZed (SpiceDB)IAM Stack FinderBuyer resources
| Attribute | ||
|---|---|---|
| Best for | Backend teams that want to embed a fast, model-driven RBAC/ABAC engine directly inside their own services in Go, Java, Node.js, Python, .NET, PHP or Rust without running a separate authorization server. | Product engineering teams building fine-grained, relationship-based permissions (sharing, hierarchies, multi-tenant B2B) at scale who want Zanzibar semantics without building them. |
| Short description | Casbin is an Apache 2.0 open-source authorization library, embedded in-process, that evaluates ACL, RBAC, ABAC and other models defined in a model.conf file against policy rules loaded from CSV or a database adapter. It entered the Apache Incubator in February 2026. | Maker of SpiceDB, the Apache-2.0 "open source permissions database" inspired by Google Zanzibar, offered self-hosted, as usage-priced AuthZed Cloud, as Dedicated cloud, or as a licensed self-hosted enterprise build. |
| Company size | startup, smb, mid_market, enterprise | startup, smb, mid_market, enterprise |
| Deployment | self_hosted | saas, self_hosted |
| Source | open source | open core |
| Pricing model | free (open source) | usage-based / enterprise |
| Integrations | Go, Java, Node.js, Python, .NET, PHP, Rust, C++ | PostgreSQL, CockroachDB, Google Cloud Spanner, MySQL, Kubernetes, gRPC, Go, Node.js |
| Categories | Authorization | Authorization |
| Claimed profile |
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