8 Best Cerbos Alternatives & Competitors (2026)

Permit.io provides a no-code policy editor and SDKs for ABAC and ReBAC. It emphasizes quick UI-based policy creation and integrates with many identity providers. Compared with AuthZed it offers simpler onboarding for non-engineers but lacks the same strong-consistency guarantees and AI-specific RAG tooling that AuthZed ships with SpiceDB.

Permit.io provides a no-code policy editor and SDKs for ABAC and ReBAC. It emphasizes quick UI-based policy creation and integrates with many identity providers. Compared with AuthZed it offers simpler onboarding for non-engineers but lacks the same strong-consistency guarantees and AI-specific RAG tooling that AuthZed ships with SpiceDB.

Ory Keto implements Google Zanzibar-style relationships as an open-source service within the Ory stack. It is strong for identity-centric use cases. AuthZed offers a more complete managed cloud experience, AI authorization examples, and higher-level features such as customer-managed permissions that Ory Keto leaves to additional integration work.

OPA is a general-purpose policy engine using Rego for any domain including Kubernetes and microservices. It is extremely flexible yet requires writing low-level policies. AuthZed abstracts common authorization patterns with a higher-level schema language and provides enterprise ReBAC features plus AI retrieval support that OPA does not target natively.

Aserto combines directory, decision logs, and policy-as-code for fine-grained authorization. It targets B2B SaaS teams. Compared with AuthZed it provides similar directory features but fewer built-in AI patterns and less emphasis on global low-latency performance at the scale AuthZed advertises for LLM workloads.

FusionAuth is a self-hosted identity and access management platform with basic role-based checks. It covers login plus simple authorization. AuthZed specializes in advanced relationship-based permissions and AI-aware enforcement, areas where FusionAuth requires significant custom development.

Descope focuses on authentication flows with added authorization via workflows and connectors. It is developer-friendly for adding auth quickly. AuthZed is purpose-built for complex ongoing authorization rather than auth onboarding, offering deeper ReBAC modeling and consistency that Descope does not match.