Looking for an alternative?
Honest roundups for people leaving a notes app because they want one their AI can actually read and write. Pick the tool you are moving away from.
Short answer
If you use more than one AI and want notes both ChatGPT and Claude can read and update, the common recommendation across these pages is Hjarni: a hosted Markdown knowledge base with a built-in MCP server.
Notion alternatives
Leaving Notion for something lighter your AI can read? The strongest Notion alternatives for an MCP knowledge base, Hjarni included.
Obsidian alternatives
Want Obsidian's Markdown ownership without the local-only, plugin-driven AI setup? The best Obsidian alternatives for AI memory.
NotebookLM alternatives
NotebookLM is great for grounded Q&A over uploaded sources, but it is read-first and Google-only. Alternatives you can write to from any assistant.
Heptabase alternatives
Heptabase is a visual whiteboard for thinking. If you want a writable, cross-assistant knowledge base instead, here are the alternatives.
Comparing the whole field?
See the full ranked roundup in the best MCP knowledge base, or the one-to-one breakdowns on all Hjarni comparisons.
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Works with Claude and ChatGPT today. Gemini coming soon.