head to head · open source
eliza vs vellum-assistant
eliza has 19,376 GitHub stars, 5,747 forks, 1,069 open issues and last shipped today. vellum-assistant has 1,292 stars, 187 forks, 179 open issues and last shipped yesterday. eliza leads on adoption by 1,400% (19,376 vs 1,292 stars). eliza is written in TypeScript under MIT; vellum-assistant is written in TypeScript under MIT. eliza has attracted 30% as many forks as stars, vellum-assistant 14%. eliza was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 20902 open source comparisons
Side by side
| eliza | vellum-assistant | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 1.3K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 5.7K | ⑂ 187 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick eliza if
- You weight community size — 19K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick vellum-assistant if
- You want the vellum-assistant feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and vellum-assistant fits your workflow better
About eliza
elizaOS is an open source, MIT licensed TypeScript framework and product stack for autonomous AI agents, built for developers who want to run or extend their own agent runtime and for end users who want a personal agent app on web, desktop, and mobile.
read the full eliza overview →
About vellum-assistant
Vellum Assistant is an MIT licensed, TypeScript personal AI assistant for individuals and small teams who want a persistent, self improving agent that runs across desktop, mobile, web, voice, email, Telegram, Slack and Twilio without building the memory and orchestration layer themselves.
read the full vellum-assistant 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 eliza or vellum-assistant more popular?
eliza has 19,376 GitHub stars and vellum-assistant has 1,292. eliza has the larger community by that measure.
Are eliza and vellum-assistant free?
Both are open source. eliza is licensed under MIT and vellum-assistant under MIT. Neither carries a licence fee.
What is the difference between eliza and vellum-assistant?
eliza is written in TypeScript and vellum-assistant 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, eliza or vellum-assistant?
Choose eliza if you want the larger community (19,376 stars) or its MIT licence terms. Choose vellum-assistant if its feature set, stack or MIT licence fits better. Both are self-hostable.