What is Oso used for?

Oso is an authorization service that models and enforces application permissions with a policy language, and now also focuses on securing AI agents. It is a good fit for modeling permissions in an application and gaining visibility into employee AI agent use.

No. Oso is proprietary (closed-source) software. Open-source alternatives to Oso include SpiceDB.

What are some alternatives to Oso?

Oso competes with Permit.io and Authress. For open-source options, see Enlisted's ranked list of open-source Oso alternatives.

Oso: features, pricing and alternatives

About Oso

Oso is a commercial authorization company. Its service lets developers model and enforce who can do what in an application using a policy language, instead of scattering permission checks through code. The company also publishes Authorization Academy material to teach authorization design.

The vendor's current homepage focuses on AI agent security and control. It lists steps to discover every agent running in a company, monitor prompts, tool calls and responses, detect rule violations, high-velocity behavior, PII leakage and exposed keys, control agents with rules such as blocking unknown MCP servers, and report with complete logs. A registry tracks real-world agent failures and exploits, and the company argues for least privilege in permissions. Oso is proprietary and vendor-hosted, with demo requests, documentation, a Slack community and a pricing page.

Key features

Policy language for application permissions
Discovery of AI agents inside a company
Monitoring of prompts, tool calls and responses
Rules to allow or block agent actions
Detection of PII leakage and exposed keys
Full logs for compliance reporting

Good fit for

→Modeling permissions in an application
→Gaining visibility into employee AI agent use

Tags: authorization; access-control; ai-agents; least-privilege; policy; security; permissions

Oso: questions and answers

What is Oso used for?: Oso is an authorization service that models and enforces application permissions with a policy language, and now also focuses on securing AI agents. It is a good fit for modeling permissions in an application and gaining visibility into employee AI agent use.
Is Oso open source?: No. Oso is proprietary (closed-source) software. Open-source alternatives to Oso include SpiceDB.
What are some alternatives to Oso?: Oso competes with Permit.io and Authress. For open-source options, see Enlisted's ranked list of open-source Oso alternatives.