Obsidian
Same files.A different job.
Both keep plain markdown in your own folders. The difference is what the app is for once the files are there.
Obsidian is the better second brain. This page is about the other half of the work.


An agent that edits the file.
Ask in plain words and it works in the document you have open, rather than answering in a chat window you then copy from.

Review before anything changes.
Plan only shows what the agent intends to do. Approve it, or keep planning.

Where each one wins
Obsidian
Linking, graph, plugins, and years of notes that reward being connected.
Ritemark
Agents in the sidebar, recordings, spreadsheets and exports, around one document.
Both
Plain markdown in your folders, so you can run them on the same vault.
More on Obsidian and Ritemark
Point Ritemark at your vault.
Free and open source.