Download the Google Zanzibar white paper annotated by AuthZed and with a foreword by Kelsey Hightower.

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Authorization
That Scales

Unblock your business with an authorization system inspired by Google's Zanzibar white paper.

Trusted By

+SpiceDB

As the creators of SpiceDB, the AuthZed team delivers enterprise-ready permissions systems built for scale and security.

Read customer stories →

“I wanted something that wasn’t coupled to an identity provider, had proven scalability that could sustain any growth our product experienced, that was flexible, without the constraints of JWTs, and that could run across multiple regions to a global scale.”

Gautam Pachnanda

Principal Engineer

SpiceDB: inspired by Google's Zanzibar
Evolved by AuthZed

The most mature open source Zanzibar implementation designed for both consistency and performance at scale.

Authorize anything, anywhere

Define fine-grained access for any object in your application or across your product suite and manage permissions using a centralized schema.

Minimize latency, maximize correctness

Specify consistency requirements per authorization check; tunable consistency features balance performance and correctness according to your use case.

Policy that scales

Determine attribute-based access (ABAC) with SpiceDB Caveats - our novel design for blending policy with a Zanzibar-based system.

Who has access?

SpiceDB returns lists of authorized subjects and accessible resources, helpful when pre-filtering permission-based results.

Ops-friendly permissions systems

Instrumented with observability tooling, a powerful Kubernetes Operator, and load testing capabilities, SpiceDB prioritizes both developer and platform engineering experiences.

Enterprise-ready products available

Love SpiceDB but not the idea of running a highly available, globally distributed, and mission-critical service? The AuthZed team is here to take the pager!

Our Customers

Permissions systems
on easy mode.

“AuthZed's SpiceDB Dedicated is the easy button for Google Zanzibar at scale. The maturity of the open source project made it a clear choice for building fine grained authorization for HackerRank's customers.”
Vinay Aggarwal
Sr. Dir. of Software Engineering, HackerRank
“We needed a long-term partner for our authorization needs. SpiceDB's modern approach to permissions, and the AuthZed team, made it an obvious choice for building out robust authorization in Spot AI's products.”
Rish Gupta
Co-Founder & CPO, Spot AI
“AuthZed removed the friction associated with managing a permissions system by doing all the heavy lifting. Their excellent tooling and comprehensive docs allowed our developers to iterate quickly and confidently.”
Jordan Cuker
Senior Software Engineer, Avise

Highly available,
securely managed
permissions systems

AuthZed Dedicated prioritizes resiliency and safety because we recognize your users are counting on us, too.

Fault tolerance

We deploy all components of AuthZed Dedicated permissions systems across multiple instances and availability zones.

Distributed deployment

AuthZed can distribute permissions systems across multiple regions to ensure service survival during regional outages.

Workload isolation

Your workloads remain safe from noisy neighbors: all resources are fully isolated and dedicated to your system.

Global availability

Choose any region currently supported by AWS or GCP. Azure support coming soon!

Security & compliance admin features

Designate bounded access to SpiceDB APIs using access tokens and review all activity in audit logs.

Private networking

Only allow trusted networks to connect to permissions systems, eliminating entire classes of security risks.

The latest from AuthZed

AuthZed Blog

Building Better Authorization Infrastructure with ARM: Benefits from Laptop to Cloud

Sam Kim

May 14, 2025

Engineering

How ARM helps AuthZed build and operate authorization infrastructure, from day-to-day productivity gains to cost-effective, performant cloud compute.

4 minutes

Zed v0.30.2 Release

Maria Inés Parnisari

May 1, 2025

Engineering

Zed CLI provides seamless interaction with SpiceDB clusters, allowing you to manage schemas, relationships, and permissions checks. Our v0.30.2 release adds composable schema support, automatic retries, backup functionality, and upcoming Windows package integration via Chocolatey.

2 minutes

Techstrong.tv Interview with Jimmy Zelinskie and Pierre-Alexandre Lacerte from Upgrade

Sam Kim

April 8, 2025

Watch AuthZed CPO Jimmy Zelinskie and Upgrade's Pierre-Alexandre Lacerte discuss modern authorization challenges, relationship-based access control, and why companies shouldn't build their own authorization systems in this insightful KubeCon Europe 2025 interview with Techstrong.

6 minutes

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AuthorizationThat Scales