--- title: "Best Authorization & Permissions Tools in 2026 (4 Tools Compared) | App Stack Builder" description: "Login tells you who someone is; authorization decides what they can do. Once a product has teams, sharing, custom roles or AI agents acting for users, hand-wr" source: https://appstackbuilder.com/categories/authorization retrieved: 2026-10-28 --- Authorization & Permissions # Best Authorization & Permissions Tools in 2026 Login tells you who someone is; authorization decides what they can do. Once a product has teams, sharing, custom roles or AI agents acting for users, hand-written if-statements stop scaling. Here are the four leading authorization tools in 2026: two open-source engines based on Google's Zanzibar, a policy-as-code engine and a hosted platform with a UI, compared on model, hosting and price. ## Authorization & Permissions Tools Compared | Tool | Pricing | Free tier | | ----------------------------- | -------------------------- | --------- | | [Cerbos](https://appstackbuilder.com/tools/cerbos) | Free · paid from $25/mo | ✓ | | [OpenFGA](https://appstackbuilder.com/tools/openfga) | Free · paid plans by quote | ✓ | | [SpiceDB](https://appstackbuilder.com/tools/spicedb) | Free · then usage-based | ✓ | | [Permit.io](https://appstackbuilder.com/tools/permit-io) | Free · paid plans by quote | ✓ | ## The Best Authorization & Permissions Tools, Ranked ![Cerbos](https://www.google.com/s2/favicons?domain=cerbos.dev&sz=128) ### 1. Cerbos Free tier· Free · paid from $25/mo Open-source (Apache-2.0) policy decision point: write RBAC and ABAC rules in YAML, run the stateless PDP next to your app for free, and add Cerbos Hub from $25 a month to manage and roll out policies. * ✓Free, stateless PDP that is easy to deploy * ✓Policies as code with built-in testing * ✓Published, usage-based Hub pricing [Cerbos & alternatives ](https://appstackbuilder.com/tool-alternatives/cerbos) ![OpenFGA](https://www.google.com/s2/favicons?domain=openfga.dev&sz=128) ### 2. OpenFGA Free tier· Free · paid plans by quote Open-source (Apache-2.0) relationship-based authorization engine inspired by Google Zanzibar, a CNCF incubating project created by Auth0/Okta. Free to self-host; Auth0 FGA is the managed version. * ✓Free and vendor-neutral under the CNCF * ✓Zanzibar-style model scales to sharing and nested resources * ✓Managed path through Auth0 FGA [OpenFGA & alternatives ](https://appstackbuilder.com/tool-alternatives/openfga) ![SpiceDB](https://www.google.com/s2/favicons?domain=authzed.com&sz=128) ### 3. SpiceDB Free tier· Free · then usage-based Open-source (Apache-2.0) Zanzibar-style permissions database from AuthZed, used by Red Hat, IBM and GitPod. Free to self-host; AuthZed Cloud is usage-billed from about $2 an hour. * ✓Most complete open-source Zanzibar implementation * ✓Strong consistency guarantees on revocation * ✓Several production-grade datastores [SpiceDB & alternatives ](https://appstackbuilder.com/tool-alternatives/spicedb) ![Permit.io](https://www.google.com/s2/favicons?domain=permit.io&sz=128) ### 4. Permit.io Free tier· Free · paid plans by quote Hosted authorization with a UI for roles, attributes and relationships (RBAC, ABAC, ReBAC). Free for 1,000 monthly active users and 20 tenants; policy runs in a local decision point built on the open-source OPAL. * ✓RBAC, ABAC and ReBAC in one product * ✓UI that non-engineers can use to manage permissions * ✓Local decision point keeps checks fast [Permit.io & alternatives ](https://appstackbuilder.com/tool-alternatives/permit-io) ## How to choose a authorization & permissions tool * Choose Permit.io for a hosted platform with a UI where product and support teams can manage roles too. It is free for 1,000 monthly active users. * Choose OpenFGA for an Apache-2.0, CNCF-hosted Zanzibar engine you run yourself, with Auth0 FGA as the managed path. * Choose Cerbos to keep roles and attribute rules as YAML policies in your repo, with a free stateless decision point next to your app. * Choose SpiceDB for the most complete open-source Zanzibar implementation, built for large sharing graphs and strict consistency on revocation. * Match the model to the product. Plain roles fit any of them; documents shared across nested teams and folders need a relationship (ReBAC) engine. ## Frequently Asked Questions What are the best authorization & permissions tools for startups in 2026?⌄ The best authorization & permissions tools for startups in 2026 include Cerbos, OpenFGA, SpiceDB, Permit.io. Compare them by pricing, free tiers, and features in the list above. What is the best free authorization & permissions tool?⌄ Free authorization & permissions options include Cerbos, OpenFGA, SpiceDB, Permit.io — all offer a free tier suitable for bootstrapped startups and MVPs. How do I choose a authorization & permissions tool?⌄ Start with your budget and team size, prefer tools with a free tier to validate, and make sure your pick integrates with the rest of your stack. App Stack Builder can recommend a complete, budget-aware stack in about 60 seconds. ## Need the whole stack, not just authorization & permissions? Get a free, AI-powered tech stack — matched to your budget, app type, and team size in 60 seconds. [Build my stack free ](https://appstackbuilder.com/)