head to head · open source
obsidian-mind vs projectmem
obsidian-mind has 5,507 GitHub stars, 611 forks, 7 open issues and last shipped 22 days ago. projectmem has 875 stars, 53 forks, 2 open issues and last shipped 7 days ago. obsidian-mind leads on adoption by 529% (5,507 vs 875 stars). obsidian-mind is written in TypeScript under MIT; projectmem is written in Python under MIT. obsidian-mind has attracted 11% as many forks as stars, projectmem 6%. projectmem was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agents, claude-code), 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
| obsidian-mind | projectmem | |
|---|---|---|
| GitHub stars | ★ 5.5K | ★ 875 |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-10-17 | 2026-11-01 |
| Forks | ⑂ 611 | ⑂ 53 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick obsidian-mind if
- You weight community size — 5.5K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick projectmem if
- You want the projectmem feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and projectmem fits your workflow better
About obsidian-mind
🌐 English 日本語 中文 한국어 Obsidian Mind An Obsidian vault that gives AI coding agents persistent memory. Built for Claude Code, with working hooks for Codex CLI and Gemini CLI. Start a session, talk about your day, and the agent handles the rest — notes, links, indexes, performance tracking. Every conversation builds on the last. 🔴 The Problem AI coding agents are powerful, but they forget. Every session starts from zero — no context on your goals, your team, your patterns, your wins. You re explain the same things. You lose decisions made three conversations ago. The knowledge never compounds. 🟢 The Solution Give…
read the full obsidian-mind overview →
About projectmem
🎉 v0.3.3 is out — pjm precheck no longer slows down as your project grows, and Windows works end to end. See what changed → We don't make AI smarter. We make it experienced. Coding agent memory — the local first memory + judgment layer for AI coding agents. One MCP server for every project. Save up to 50%+ of AI tokens. Stop repeating yesterday's bug. Website • Guide • Demo • Changelog • Paper pjm visualize — every case your project solved, what failed on the way, and what it saved. Generated locally from .projectmem/events.jsonl . 🚀 Start here — five minutes, once Five minutes if you follow along here. Want…
read the full projectmem overview →
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Frequently asked questions
Is obsidian-mind or projectmem more popular?
obsidian-mind has 5,507 GitHub stars and projectmem has 875. obsidian-mind has the larger community by that measure.
Are obsidian-mind and projectmem free?
Both are open source. obsidian-mind is licensed under MIT and projectmem under MIT. Neither carries a licence fee.
What is the difference between obsidian-mind and projectmem?
obsidian-mind is written in TypeScript and projectmem 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, obsidian-mind or projectmem?
Choose obsidian-mind if you want the larger community (5,507 stars) or its MIT licence terms. Choose projectmem if its feature set, stack or MIT licence fits better. Both are self-hostable.