📝claude-mem and 📝Obsidian both keep their store on the user's own machine. claude-mem's repository opens with "Your coding agent forgets everything between sessions. Claude-Mem remembers for it." Obsidian's site describes it as "the free and flexible app for your private thoughts." They split on what fills the store: claude-mem records what a coding agent does during a session, while Obsidian stores the user's notes as plain text 📝Markdown files.
At a Glance
Capture Model
claude-mem's README says hooks in the agent "hand each tool call (what it reads, edits and runs) to a small local worker." A second agent "turns that activity into short observations, and writes a summary when the session ends." The next session opens with "a compact index of the observations that matter for this project." The docs also list 📝MCP search tools for querying project history in natural language. Sessions are recorded in 📝Claude Code, Codex, Cursor, OpenCode and other agents.
Obsidian "stores your notes locally as plain text Markdown files" in a vault, which its help site defines as "a folder on your local file system, including any subfolders." Notes connect through internal links: the Backlinks core plugin lists linked and unlinked mentions of the active note as 📝backlinks, and the 📝graph view is offered to "visualize the relationships between your notes." The site cites "thousands of plugins and themes," and the help site describes 📝community plugins as "features built by Obsidian users."
Storage and Privacy
claude-mem's README states: "Your memory lives in ~/.claude-mem on your machine. Cloud sync is opt-in." SQLite holds "sessions, observations and summaries," and Chroma adds 📝semantic search on top of SQLite's keyword search. Content wrapped in <private> tags "never gets stored." Anonymous usage analytics are on by default; npx claude-mem telemetry disable turns them off. An optional claude-mem observer starts a 30-day free trial that asks for a payment method.
Obsidian's pricing page says "your data is stored locally on your device, making it inaccessible to us," and that its apps "do not collect telemetry data." Its optional Sync service secures data "with AES‑256 end-to-end encryption" (see 📝Sync / End-to-End Encryption). As of November 2026, Sync costs $4 per user per month billed annually or $5 billed monthly; Publish costs $8 per site per month billed annually or $10 billed monthly; a $50 per user per year commercial license is optional.
Who Each Is For
claude-mem's docs describe its purpose for coding agents: "Claude-Mem runs a second agent beside it that takes notes while it works."
Obsidian's site presents the app for uses "from personal notes to journaling, knowledge bases, and project management."
Related
- 📝Claude-Mem — reference memo on the coding-agent memory plugin
- 📝Obsidian — reference memo on the notes app
- 📝MemPalace vs Obsidian — another agent-memory tool compared with Obsidian
- 📝MemPalace vs Obsidian vs MythOS as Claude Memory — three-way hub on memory for Claude
- 📝Obsidian MCP — how agents reach an Obsidian vault
- 📝Local-First Software — the broader idea of software that keeps data on the user's device