Best Authorization-as-a-Service in 2026

Authorization as a service decides what a signed-in user, service, or agent can do after login. Authentication as a service (Auth0, Cognito, Clerk) verifies who is asking. The best authorization option depends on your access model, who edits policy, and where decisions run. Permit.io fits a managed control plane with local PDPs. The other options fit the cases below.

We build Permit.io, so read this as a vendor-written comparison. To keep it useful, we based the comparison on each vendor's documentation or pricing page, checked on 5 October 2026. Where a point depends on vendor documentation, we attribute it or avoid stating it as fact. These products change quickly, so open the linked pages before you decide. For foundational concepts, see our earlier introduction to authorization as a service.

What is authorization as a service?

Authorization as a service is a hosted or partly hosted system that decides what a signed-in user, service, or agent can do in your application, so you do not rebuild that logic in every codebase. Authentication as a service (products like Auth0, Amazon Cognito, or Clerk) verifies who the user is; authorization as a service answers what they can do after that. See authentication vs authorization. Most teams start with a few if statements and a roles column, then discover that tenants, sharing, custom roles, and audit questions turn that code into a product of its own.

An authorization service takes that logic out of the application. Your code acts as the enforcement point and asks a decision point a question such as "can this user publish this document?". The service provides some mix of a policy store, a decision engine, and a management interface. The differences that matter are who edits policy, where the decision is computed, and which access model the engine understands. For the architecture behind this split, see PEP, PDP, and decision logs, and for the build-or-buy question see why rolling your own RBAC gets expensive and why teams stop rebuilding permissions in application code.

Authorization-as-a-service comparison table

The table compares seven options on the dimensions that usually decide the shortlist. It lists billing models and no prices, because plans change often. Access models, languages, and licensing come from each vendor's documentation.

Two notes on reading it. First, a "yes" for a model is not the same as parity: Permit's own docs say the Cloud PDP evaluates RBAC and ReBAC but not ABAC, and you need an Edge PDP for attribute conditions and custom policy code. Second, "managed" can mean a hosted decision API, a hosted control plane with decisions in your network, or both, and that difference usually decides the shortlist.

How to narrow the list

Three questions remove most candidates.

Who changes policy? If only engineers do, in pull requests, a policy-as-code engine with a clear testing workflow may be enough. If product managers, support, or your customers' administrators need to change access without a release, you need an editor or embeddable UI, and that narrows the field.

Where must the decision run? A check sits on the critical path of every request. Some teams are comfortable with a hosted decision API. Others need the decision point in their own VPC, or fully air-gapped. Check what happens to decisions when the vendor's control plane is unreachable, and ask for the answer in the vendor's own docs.

What shape is your data? Tenant-wide roles with a handful of permissions are a different problem from a Google-Docs-style graph of folders, groups, and shares. Relationship-heavy products are built for the second case. Role-first products are simpler for the first. For a deeper look at the models themselves, read RBAC vs ABAC vs ReBAC. For a step-by-step evaluation process, see how to choose an authorization service, and for a self-hosted shortlist see top open-source authorization tools for enterprises in 2026.

The options, and when to choose each

Each section ends with when to choose that product and, where another option fits better, when to choose that instead.

Permit.io

Permit.io splits authorization into a control plane and decision points. The control plane lives in Permit's cloud, where you manage policy in the Policy Editor, the API, Terraform, or GitOps. The editor generates policy as code for OPA (Rego) or Cedar. Decisions come from a managed Cloud PDP, or from an Edge PDP container that you run beside your services, kept in sync by OPAL. Permit also ships Permit Elements, embeddable components for user management, access requests, approvals, and audit logs.

Permit generates policy in open languages (Rego or Cedar) rather than a proprietary format. OPA is a CNCF graduated project, and Cedar was accepted to the CNCF at Sandbox on 8 October 2025. The generated policy can be reviewed in Git, tested with standard tools (opa test on the policy repository, Permit CLI test commands), and reused outside Permit if you later change control planes.

Beyond the editor, Permit is built for a full policy SDLC. You can manage the authorization model with the official Terraform provider (permitio/permit-io on the Terraform Registry), sync generated policy into a Git repository you own through GitOps, separate projects and environments for promotion, drive changes from the API and Permit CLI, and wire CI/CD plus policy tests before production.

Permit.io models ReBAC with resource instances, relationship tuples, resource roles, and role derivation. OPAL pushes policy and related data to Edge PDPs so checks can run against a local copy without the application stuffing the full graph into every request. For larger relationship-heavy datasets, Permit documents Nexus PDP (early access as of September 2026) as a self-hosted option with on-disk storage and sync that resumes after disconnection. Treat Nexus availability as time-sensitive and recheck before you buy.

The Cloud PDP does not evaluate ABAC or custom Rego, so those workloads need an Edge PDP that you operate. The Policy Editor generates allow rules, and deny-override rules need custom Rego.

Permit.io's own service holds a SOC 2 Type II attestation covering Security, Availability and Confidentiality. The latest renewal was completed in January 2026, and Sections 1 and 2 of the report are public on the trust center. Business Associate Agreements are available where applicable. Pricing is on the pricing page: a free Community tier, usage-based Pro and Enterprise tiers priced by MAU, and Enterprise plans by quote.

Choose Permit.io when

• Non-engineers need to change who can do what without a code release, or your customers' admins need to manage access inside your product.
• You want a managed control plane but want decisions made inside your own network, with a deployment path from hybrid to full on-premise.
• You expect to mix RBAC, ABAC, and ReBAC in one policy and want open source engines underneath.
• You want policy in Terraform, GitOps, environments, CI/CD, and a CLI, on top of open policy languages (Rego or Cedar).

Choose something else when

• You want hand-written policy files in Git and a decision point with no control plane at all. Cerbos is built for that.
• Your problem is relationship-first authorization with Zanzibar-style consistency controls. AuthZed or OpenFGA-based products are purpose built for it.
• You run only on AWS and are happy to write Cedar directly. AWS Verified Permissions keeps the authorization service inside your AWS stack.

Oso Cloud

Oso Cloud is a hosted authorization service built around Polar, a declarative logic language. According to Oso's docs, Polar can express RBAC, ReBAC, and ABAC. Oso offers three deployment models: cloud, hybrid with read-only fallback nodes in your infrastructure, and self-hosted, which Oso currently supports on AWS. Its Local Authorization feature can return SQL expressions to run against your own PostgreSQL or MySQL database, which is useful for filtering lists. Oso's public pricing page now lists plans for Oso for Agents, and its docs describe Oso Cloud billing as usage-based, so ask Oso for current Oso Cloud pricing.

Choose Oso Cloud when

• You want authorization expressed as logic in one declarative language, owned by engineers.
• Filtering collections against your own SQL database is a central need.
• You want a vendor-hosted service with a hybrid fallback option for outages.

Choose something else when

• Product or support teams, or your customers, need a UI to manage access. Permit.io is built around that.
• You need an open source decision point you can run with no vendor relationship. Cerbos and SpiceDB are open source.

Cerbos

Cerbos is built around an open source, stateless PDP that you run as a service, sidecar, or daemonset. Policies are YAML or JSON files with CEL conditions, typically stored in Git. Cerbos Hub is an optional commercial control plane for authoring, testing, distribution, and audit log aggregation. According to Cerbos, the PDP needs no license or Hub account. Cerbos pricing is based on monthly active principals, with the open source PDP free.

Cerbos policies are YAML or JSON documents with CEL conditions. That format is Cerbos-specific. CEL itself is an open expression language, but the surrounding policy schema, rule shape, and evaluation semantics are proprietary to Cerbos. Teams that invest deeply in Cerbos policy files should plan for a rewrite if they move engines later. YAML is designed for configuration and structured data, not for expressing branching logic. In Cerbos, complex rules become CEL expression strings embedded inside YAML fields. Those strings are harder to format, refactor, type-check, and unit-test than policy written in a language meant for logic (such as Rego or Cedar). For small allow/deny matrices this is fine. For large, evolving authorization logic, a dedicated policy language is usually easier to keep correct.

The PDP is stateless: it evaluates the policies it has loaded against the principal and resource attributes supplied on each API request. Relationship facts are not stored as a first-class graph inside the open source PDP the way Permit stores relationship tuples; if a rule needs "user owns folder," the caller (or Synapse) must provide those attributes on the check.

For a deeper technical comparison, see Permit.io vs Cerbos: managed control plane vs self-hosted PDP.

Choose Cerbos when

• You want policy as reviewed, tested files in your repository and a decision path with no control plane.
• Only engineers edit policy, and a sidecar or air-gapped deployment is a hard requirement.
• You want an Apache 2.0 PDP first, with the option to add Cerbos Hub later.

Choose something else when

• Non-developers must author policy, or you need prebuilt embeddable access-request and user-management UI. If those are hard requirements, compare Cerbos with products that include those components, including Permit.io. See also Cerbos's comparison page.
• You need OPAL-style data sync to your PDP rather than passing attributes on each request.

AuthZed (SpiceDB)

AuthZed develops SpiceDB, an open source permissions database inspired by Google Zanzibar. You describe your model in the SpiceDB schema language, write relationships, and query permissions with configurable consistency. AuthZed sells AuthZed Cloud, Dedicated Cloud, and self-hosted licenses, and SpiceDB itself is Apache 2.0 licensed.

Choose AuthZed when

• Your core problem is a large relationship graph: nested organizations, folders, groups, and sharing.
• You want Zanzibar semantics and consistency controls, with an open source core you can run yourself.
• You are comfortable owning the data-sync work between your application database and the permissions database.

Choose something else when

• Your needs are mostly roles and attribute conditions, with non-engineers editing policy. A role-first product will be less work.

Auth0 FGA

Auth0 FGA is Okta's managed relationship-based access control service built on OpenFGA, the CNCF open source project. You write an authorization model and store relationship tuples. According to the subscription docs, the free tier is for evaluation, with limits such as 100 monthly active users and 50 thousand tuples, and production use requires an enterprise contract.

Choose Auth0 FGA when

• You already use Auth0 or Okta and want one vendor relationship for identity and relationship-based authorization.
• Your model is relationship-based and you like that the service is built on open source OpenFGA, which Auth0 says keeps you from being locked into a proprietary system.

Choose something else when

• You want to start in production without a sales conversation. Self-hosting OpenFGA or choosing a product with a self-service plan avoids that.
• You need a policy editor for non-engineers, or ABAC-heavy rules without relationships.

WorkOS FGA

WorkOS FGA extends the WorkOS RBAC product with resources arranged in a hierarchy, so a role on a workspace flows down to the projects and apps inside it. According to the docs, it has no schema DSL, integrates with SSO, Directory Sync, and AuthKit, and can be adopted incrementally. Subjects today are organization memberships and groups. WorkOS's public pricing page did not list FGA when we checked, so confirm terms with WorkOS.

Choose WorkOS FGA when

• You already use WorkOS for SSO, Directory Sync, or AuthKit and want roles scoped to workspaces and projects with inheritance.
• You prefer configuring resource types in a dashboard over learning a modeling language.

Choose something else when

• You need attribute conditions, arbitrary relationship graphs, or decision points inside your own network. If those are requirements, confirm current support with WorkOS before relying on them.

AWS Verified Permissions

Amazon Verified Permissions is a managed service for fine-grained authorization in custom applications. Policies are written in Cedar, the open source policy language, and managed through the AWS console, APIs, or CloudFormation. It assumes the user is already authenticated elsewhere, for example by Amazon Cognito or another OIDC provider. AWS prices it per API request, with no upfront or minimum fees.

Choose AWS Verified Permissions when

• Your workloads and identity already live in AWS, and you want Cedar with AWS-native billing and access control.
• Pay-per-request pricing suits a low or spiky call volume.

Choose something else when

• You need decisions inside your own network or on other clouds, a policy UI for non-developers, or embeddable end-user components. You can also run Cedar through Permit.io if you want the language without tying the service to AWS.

Failure modes, data sync, and audit export

When you shortlist an authorization service, ask how decisions behave under failure, how policy and data reach the decision point, and how you export audit evidence. Below is what Permit.io documents today, plus Cerbos where its docs are explicit. For the other vendors in this post, treat the questions at the end as the evaluation checklist unless their docs state the answer clearly.

Failure modes and latency

With Permit.io, an Edge PDP answers from the policy and data it already holds. The trust center says a local PDP can continue evaluating cached policy during a temporary control-plane interruption, and that policy updates resume when connectivity returns. The managed Cloud PDP is hosted by Permit, so checks depend on Permit's service being available. Edge PDPs can optionally cache repeated decisions for a TTL (off by default); cached answers can be stale until the entry expires. Sidecar Edge PDPs send checks over loopback, which Permit docs describe as sub-millisecond.

With Cerbos, the standalone PDP has no control-plane dependency for decisions. Cerbos Hub is optional for authoring, signed bundle distribution, and audit aggregation. If Hub is in your design, ask Cerbos what a connected PDP serves when Hub is unreachable.

Public docs we checked for Permit and Cerbos do not define a product-level fail-open or fail-closed switch for the case where the PDP itself is unreachable. That choice belongs to your enforcement point. Ask each vendor, and your own integration, what happens when the decision service does not answer.

How policy and data reach the PDP

Permit.io uses OPAL inside the Edge PDP to push policy and data from the control plane so decisions run from a local copy (deployment options).

Cerbos loads policies through storage drivers such as disk, Git, blob stores, and databases. Callers typically pass attributes with each request; Cerbos Hub can push signed policy bundles after validation and tests.

Audit logs and export

Permit.io provides an Audit Log screen and API filterable by user, date, decision, and tenant. Edge PDPs deployed with the Permit Helm chart can use the logs forwarder to send decision logs to stdout or Elasticsearch.

Cerbos PDP audit logging supports local, file, and Kafka backends. Cerbos Hub audit log collection aggregates decision logs across PDPs, with local buffering when the network drops.

Questions to ask each vendor

• What happens to checks if your control plane is unreachable, and what happens if the PDP itself is unreachable?
• Do you document fail-open or fail-closed behavior at the product layer, or is that left to the application?
• How do policy and relationship or attribute data reach each decision point, and how fresh can they be?
• Can decision logs be exported to your SIEM or log stack, and what retention do you publish?
• Where do decisions run (hosted API, sidecar, your VPC), and what latency should we measure in a proof of concept?

Quick decision guide

Frequently asked questions

What is authorization as a service?

Authorization as a service is a hosted or partly hosted system that decides whether a user, service, or agent may perform an action on a resource, so you do not build that logic into each application. Your code asks a decision point and enforces the answer. The service usually adds a way to manage policy and, in some products, user-facing UI and audit logs.

Which authorization as a service is best for a multi-tenant SaaS app?

It depends on who manages access and where decisions run. Teams that need per-tenant roles, customer-admin UI, and decisions in their own network often shortlist Permit.io (see also best practices for multi-tenant authorization). Teams that prefer policy as files in Git look at Cerbos, and teams with sharing-heavy relationship graphs look at AuthZed or Auth0 FGA.

Is there a free authorization as a service?

Several products have free options with different limits. Permit.io's Community plan is free and lists limits of 1,000 monthly active users and 20 tenants. The Cerbos PDP and SpiceDB are open source and free to self-host, Auth0 FGA has a free evaluation tier that is not meant for production, and AWS Verified Permissions charges per request with no minimum.

Which options can I self-host?

Cerbos and SpiceDB are open source and can run entirely in your infrastructure. Permit.io's Edge PDP runs in your network and Enterprise customers can deploy the full platform on-premise. Oso supports self-hosting on AWS, and OpenFGA, the open source base of Auth0 FGA, is self-hostable. According to their docs, AWS Verified Permissions and WorkOS FGA are hosted services.

How is authorization as a service different from OPA or Cedar?

OPA and Cedar are policy engines: they evaluate policy against input and return a decision. An authorization service adds what surrounds the engine, such as policy storage, data synchronization to decision points, a management interface, and audit logs. Some services are built on these engines. Permit.io, for example, runs OPA or Cedar inside its decision points. For a deeper comparison, read the policy engine showdown.

Do I need RBAC, ABAC, or ReBAC?

Start with the question you need to answer. Roles answer "what can an editor do", attributes answer "under what conditions", and relationships answer "what does this person have to do with this specific document". Many products grow into a mix, so check whether the service can combine models before you commit. See RBAC, ABAC, and ReBAC for the basics.

Does Permit.io have a SOC 2 report?

Permit.io's service holds a SOC 2 Type II attestation covering Security, Availability and Confidentiality, with the latest renewal completed in January 2026. Sections 1 and 2 of the report are public on the trust center. Using Permit does not make your own application SOC 2 compliant, because your controls and your audit remain your own.