head to head · open source
opa vs agent-governance-toolkit
opa has 12,425 GitHub stars, 1,706 forks, 310 open issues and last shipped yesterday. agent-governance-toolkit has 6,513 stars, 1,126 forks, 176 open issues and last shipped 2 days ago. opa leads on adoption by 91% (12,425 vs 6,513 stars). opa is written in Go under Apache-2.0; agent-governance-toolkit is written in Python under MIT. opa has attracted 14% as many forks as stars, agent-governance-toolkit 17%. opa was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (compliance), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| opa | agent-governance-toolkit | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 6.5K |
| License | Apache-2.0 | MIT |
| Written in | Go | Python |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 1.7K | ⑂ 1.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick opa if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick agent-governance-toolkit if
- You want the agent-governance-toolkit feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and agent-governance-toolkit fits your workflow better
About opa
Open Policy Agent Open Policy Agent (OPA) is an open source, general purpose policy engine that enables unified, context aware policy enforcement across the entire stack. OPA is proud to be a graduated project in the Cloud Native Computing Foundation (CNCF) landscape. For details read the CNCF announcement. Get started with OPA Write your first Rego policy with the Rego Playground or use it to share your work with others for feedback and support. Have a look at the Access Control examples if you're not sure where to start. Install the VS Code extension to get started locally with live diagnostics, debugging and…
About agent-governance-toolkit
🌍 English 日本語 简体中文 한국어 Agent Governance Toolkit Ship agents to production without losing sleep 🚀 Quick Start · 📋 Specifications · 📦 PyPI · 📝 Changelog brightgreen) [!IMPORTANT] Public Preview production quality public preview releases. May have breaking changes before GA. Policy enforcement, identity, sandboxing, and SRE for autonomous AI agents. One pip install , any framework. The Problem Your AI agents call tools, browse the web, query databases, and delegate to other agents. Once deployed, they make decisions autonomously. You need answers to three questions: 1. Is this action allowed? An agent with…
read the full agent-governance-toolkit overview →
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Frequently asked questions
Is opa or agent-governance-toolkit more popular?
opa has 12,425 GitHub stars and agent-governance-toolkit has 6,513. opa has the larger community by that measure.
Are opa and agent-governance-toolkit free?
Both are open source. opa is licensed under Apache-2.0 and agent-governance-toolkit under MIT. Neither carries a licence fee.
What is the difference between opa and agent-governance-toolkit?
opa is written in Go and agent-governance-toolkit in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, opa or agent-governance-toolkit?
Choose opa if you want the larger community (12,425 stars) or its Apache-2.0 licence terms. Choose agent-governance-toolkit if its feature set, stack or MIT licence fits better. Both are self-hostable.