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 an official 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
Compare local Markdown and official CLI workflows with hosted knowledge bases and MCP access.
Apple Notes alternatives
Compare Apple Notes capture, collaboration, and Markdown export with knowledge bases offering external assistant connections.
NotebookLM alternatives
Compare grounded source research and editable notes in NotebookLM/Gemini Notebook with shared knowledge bases for external assistants.
Heptabase alternatives
Compare Heptabase’s visual cards and official hosted MCP with document-oriented knowledge bases.
mem0 alternatives
Compare programmatic memory, direct imports, and hosted MCP with shared Markdown knowledge bases.
Supermemory alternatives
Compare Supermemory’s memory engine, shared spaces, and APIs with document-oriented knowledge bases.
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.
Apps and connections
On every device. In every assistant.
Native apps for iPhone, iPad, Mac and Android, and official listings in both the ChatGPT and Claude directories. One account, one set of notes.
Write and read anywhere
The apps are free, with the same features as the web. An internet connection is required.
Connect the assistant you already use
Hjarni is listed in the ChatGPT Apps Directory and the Claude Connectors Directory, so connecting is an install, not a config file.
Start here
Write once. You both remember.
25 notes free, forever. No credit card required.
Works with Claude, ChatGPT, Cursor and any MCP client.