head to head · open source
Hermes Agent vs CopilotKit
Hermes Agent has 246,492 GitHub stars, 51,615 forks, 41,784 open issues and last shipped yesterday. CopilotKit has 37,396 stars, 4,638 forks, 295 open issues and last shipped yesterday. Hermes Agent leads on adoption by 559% (246,492 vs 37,396 stars). Hermes Agent is written in Python under MIT; CopilotKit is written in TypeScript under MIT. Hermes Agent has attracted 21% as many forks as stars, CopilotKit 12%. CopilotKit was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, ai-agent), 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.
← all 8884 open source comparisons
Side by side
| Hermes Agent | CopilotKit | |
|---|---|---|
| GitHub stars | ★ 246K | ★ 37K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 52K | ⑂ 4.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Hermes Agent if
- You weight community size — 246K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick CopilotKit if
- You want the CopilotKit feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and CopilotKit fits your workflow better
About Hermes Agent
Hermes Agent is a desktop AI agent developed by Nous Research that maintains persistent memory and self improving capabilities across sessions and platforms. It operates as a local first, cross platform interface for LLMs, integrating with multiple model providers and deployment environments without vendor lock in. The agent implements a closed learning loop where it curates its own memory, creates and refines skills from experience, and supports cross session recall via full text search and summarization.
read the full Hermes Agent overview →
About CopilotKit
CopilotKit is a frontend SDK for building agent native applications and generative UI experiences. It provides tooling and protocols to connect AI agents—regardless of backend framework—to user interfaces across web, mobile, and messaging platforms. It lives in the agentic AI ecosystem, specifically targeting developers who need to embed intelligent assistants into products without rebuilding agent logic for each surface.
read the full CopilotKit overview →
More in AI & Machine Learning
Related comparisons
More AI Interaction & Interfaces projects
Compare either of these against the rest of the AI Interaction & Interfaces field.
Frequently asked questions
Is Hermes Agent or CopilotKit more popular?
Hermes Agent has 246,492 GitHub stars and CopilotKit has 37,396. Hermes Agent has the larger community by that measure.
Are Hermes Agent and CopilotKit free?
Both are open source. Hermes Agent is licensed under MIT and CopilotKit under MIT. Neither carries a licence fee.
What is the difference between Hermes Agent and CopilotKit?
Hermes Agent is written in Python and CopilotKit in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Hermes Agent or CopilotKit?
Choose Hermes Agent if you want the larger community (246,492 stars) or its MIT licence terms. Choose CopilotKit if its feature set, stack or MIT licence fits better. Both are self-hostable.