--- title: "agent-protocol vs leon" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/agi-inc-agent-protocol-vs-leon-ai-leon" tools: ["agi-inc-agent-protocol", "leon-ai-leon"] --- # agent-protocol vs leon *GraphCanon updated Aug 6, 2026* ## Verdict Pick agent-protocol if agent-protocol provides a standardized interface for interacting with various AI agents regardless of their underlying tech stack, aiming to ease development, deployment, and benchmarking; pick leon if leon is an open-source personal assistant built with TypeScript under the MIT license, designed for users who prioritize privacy and offline operation. [agent-protocol](https://agentprotocol.ai) reports 1.5k GitHub stars, 185 forks, and 50 open issues, last pushed Apr 8, 2025. [leon](https://getleon.ai) has 17k stars, 1.5k forks, and 109 open issues, last pushed Jul 27, 2026. Figures are from public GitHub metadata via [agent-protocol's repository](https://github.com/agi-inc/agent-protocol) and [leon's repository](https://github.com/leon-ai/leon). | | [agent-protocol](/tools/agi-inc-agent-protocol.md) | [leon](/tools/leon-ai-leon.md) | | --- | --- | --- | | Tagline | Common interface for AI agents | Leon is your open-source personal assistant | | Stars | 1,458 | 17,388 | | Forks | 185 | 1,452 | | Open issues | 50 | 109 | | Language | Python | TypeScript | | Adopt for | agent-protocol provides a standardized interface for interacting with various AI agents regardless of their underlying tech stack, aiming to ease development, deployment, and benchmarking. | Leon is an open-source personal assistant built with TypeScript under the MIT license, designed for users who prioritize privacy and offline operation. | | Persona | - | - | | Runtime | - | - | | License | MIT | MIT | | Categories | AI Agents | AI Agents | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [agent-protocol](/tools/agi-inc-agent-protocol.md) | [leon](/tools/leon-ai-leon.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Very active (96%) | | Days since push | 484d | 1d | | Open issues (now) | 50 | 109 | | Full report | [trust report](/tools/agi-inc-agent-protocol/trust.md) | [trust report](/tools/leon-ai-leon/trust.md) | ## Decision facts: agent-protocol - **Adopt for:** agent-protocol provides a standardized interface for interacting with various AI agents regardless of their underlying tech stack, aiming to ease development, deployment, and benchmarking. ## Decision facts: leon - **Adopt for:** Leon is an open-source personal assistant built with TypeScript under the MIT license, designed for users who prioritize privacy and offline operation. ## Choose when ### Choose agent-protocol if… - agent-protocol is primarily Python; leon is TypeScript. - Tags unique to agent-protocol: agents, api, auto-gpt, gpt-4. - When you want to ensure interoperability between different AI agents irrespective of the frameworks used by them. ### Choose leon if… - leon is primarily TypeScript; agent-protocol is Python. - Tags unique to leon: speech-recognition, text-to-speech. - Use Leon if you need a personal assistant that operates offline, ensuring your data isn't sent to external servers without review. ## When NOT to use agent-protocol - If you are developing an isolated system with no intention to communicate or integrate with other AI agents outside this scope. - When working in environments where specific, proprietary interfaces provide significantly better performance or features than adhering to a generic protocol could offer. ## When NOT to use leon - Do not use Leon if you require extensive functionality provided by languages like Python or frameworks not supported by TypeScript. - Avoid Leon if your project strictly requires real-time internet connectivity, as it is optimized for offline operation which could limit certain networking features. ## Common questions ### What is the difference between agent-protocol and leon? agent-protocol: Common interface for AI agents. leon: Leon is your open-source personal assistant. See the comparison table for live GitHub stats and shared categories. ### When should I choose agent-protocol over leon? Choose agent-protocol over leon when agent-protocol is primarily Python; leon is TypeScript; Tags unique to agent-protocol: agents, api, auto-gpt, gpt-4; When you want to ensure interoperability between different AI agents irrespective of the frameworks used by them. ### When should I choose leon over agent-protocol? Choose leon over agent-protocol when leon is primarily TypeScript; agent-protocol is Python; Tags unique to leon: speech-recognition, text-to-speech; Use Leon if you need a personal assistant that operates offline, ensuring your data isn't sent to external servers without review. ### When should I avoid agent-protocol? If you are developing an isolated system with no intention to communicate or integrate with other AI agents outside this scope. When working in environments where specific, proprietary interfaces provide significantly better performance or features than adhering to a generic protocol could offer. ### When should I avoid leon? Do not use Leon if you require extensive functionality provided by languages like Python or frameworks not supported by TypeScript. Avoid Leon if your project strictly requires real-time internet connectivity, as it is optimized for offline operation which could limit certain networking features. ### Is agent-protocol or leon more popular on GitHub? leon has more GitHub stars (17,388 vs 1,458). Stars measure visibility, not whether either tool fits your constraints. ### Are agent-protocol and leon open source? Yes - both are open-source projects on GitHub (agent-protocol: MIT, leon: MIT). ### Where can I find alternatives to agent-protocol or leon? GraphCanon lists graph-backed alternatives at [agent-protocol alternatives](/tools/agi-inc-agent-protocol/alternatives) and [leon alternatives](/tools/leon-ai-leon/alternatives) ([agent-protocol markdown twin](/tools/agi-inc-agent-protocol/alternatives.md), [leon markdown twin](/tools/leon-ai-leon/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/agi-inc-agent-protocol-vs-leon-ai-leon.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, agent-protocol or leon? agent-protocol: Dormant. leon: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for agent-protocol and leon? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [agent-protocol trust report](/tools/agi-inc-agent-protocol/trust); [leon trust report](/tools/leon-ai-leon/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=agi-inc-agent-protocol`](/api/graphcanon/graph?tool=agi-inc-agent-protocol) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_