head to head · open source
odysseus vs sim
odysseus has 94,935 GitHub stars, 1,862 forks, 1,233 open issues and last shipped yesterday. sim has 29,974 stars, 3,879 forks, 336 open issues and last shipped yesterday. odysseus leads on adoption by 217% (94,935 vs 29,974 stars). odysseus is written in Python under AGPL-3.0; sim is written in TypeScript under Apache-2.0. odysseus has attracted 2% as many forks as stars, sim 13%. sim was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| odysseus | sim | |
|---|---|---|
| GitHub stars | ★ 95K | ★ 30K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.9K | ⑂ 3.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick odysseus if
- You weight community size — 95K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick sim if
- You want the sim feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and sim fits your workflow better
About odysseus
A self hosted AI workspace for chat, agents, research, documents, email, notes, calendar, and local model workflows. Quick Start · Setup Guide · Contributing · Roadmap Quick Start dev is the default branch and gets the newest changes first. Use main if you want the more curated branch. Open when the containers are healthy. The first admin password is printed in docker compose logs odysseus . Native installs, GPU notes, Windows/macOS instructions, HTTPS, and configuration live in the setup guide. Features Chat + Agents — local/API models, tools, MCP, files, shell, skills, and memory. Cookbook — hardware aware…
read the full odysseus overview →
About sim
A workspace to build, deploy and manage AI agents and workflows. Quickstart Cloud hosted: sim.ai Self hosted Open Desktop: macOS macOS 12+, Apple Silicon and Intel. See the desktop docs to point it at a self hosted deployment. Capabilities Connect 1,000+ integrations and every major LLM Add Slack, Notion, HubSpot, Salesforce, databases, and more Build agents visually, conversationally, or with code Ingest files, knowledge bases, and structured table data Monitor runs, logs, schedules, and workflow activity One workspace, every surface Chat and workflows are just the start — tables, files, and knowledge all live…
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 odysseus or sim more popular?
odysseus has 94,935 GitHub stars and sim has 29,974. odysseus has the larger community by that measure.
Are odysseus and sim free?
Both are open source. odysseus is licensed under AGPL-3.0 and sim under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and sim?
odysseus is written in Python and sim 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, odysseus or sim?
Choose odysseus if you want the larger community (94,935 stars) or its AGPL-3.0 licence terms. Choose sim if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.