Hjarni Notes
Your notes, your AI's memory.
- Category
- Productivity
- Primary Subcategory
- Personal AI Memory & Second Brain
Integration details
Description
Hjarni is a knowledge base your AI can actually use. Write notes in Markdown. Organize them in folders and tags. ChatGPT reads them directly through a built-in MCP server. No plugins. No pasting the same context into every conversation. ChatGPT starts every conversation from zero. Connect Hjarni once and it stops asking. Ask questions across all your notes. Have ChatGPT write new notes, update old ones, and tag them the way you want. Set instructions per folder to control how ChatGPT writes, formats, and tags. Share a folder with your team so everyone's AI works from the same knowledge base. Search across everything in one call. Built on the same open MCP standard as Claude, so your knowledge base is not locked to one assistant. Use it as your second brain, your project memory, your research library, or your team's shared context. Notes, folders, tags. That is the product. Simple on purpose. Free to start. No credit card required.
- Integration type
- Plugin
- Verification status
- Not applicable
- Platform
- ChatGPT
- Primary Subcategory
- Personal AI Memory & Second Brain
- Secondary Subcategories
- None listed
- Brand
- Hjarni
- Access
- Account required
- First tracked
- 2026-08-26
- Tool count
- 37
- Geography
- US
The Primary Subcategory used for this profile’s headline score.
Other Subcategories where the Integration is listed.
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ChatGPT Plugin Discovery Score
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What discovery looks like

Competing in ChatGPT Personal AI Memory & Second Brain
View Category37 tools agents can invoke
How do I improve a ChatGPT Plugin's discoverability?
The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.
What are Hjarni Notes alternatives on ChatGPT?
As of 2026-09-28, Hjarni Notes competes with AI Passport, AI Whisper Voice Note Taker, AI Wisebase, AiAkiv Memory, Arkon Vault, Auto, Axiomyx Mobile, Axiomyx Personal, Axis, Basic Memory Cloud, Bond, ButlerBrain, CentricMem, Chat2Doc, ChatData Sync, CherryDrop, Coconut, ContextBolt Bookmarks, Contextick, Contextli, Continuity, CopyCharm, Cortex — Semantic Memory, Create State, Cribly, DeerDawn, Dijin Memory, Dispensa, DotSpark, Empirical, Engram, Esment, Fieldy, Fluent, Genesys, Giraffe, GoodMem, Guides, Jade Note, Jotter, Kepler, KinicMemory, Komplyt Zero, LIAM, Lians Memory, Linko, Looki, Memocore, Memoket, MemStore, Miyo, Mygentic, NeoSapien, NewTwos, NugIt, Oi, omi, Omphalis, Open Context, Orbismo, Personal Context, Rhythm AI Personality Tuner, Savantis Memory, Stem, Symbol, TimePeace — Daily Log, TwinMind, UseMyContext.ai, VaultSage, VITALS, Vocci, Voicenotes, Wazu, Weave, Werify, XMemo, こころぐ, 티에이치스터디 in ChatGPT Personal AI Memory & Second Brain, ranked by public Discoverability Score.
Where is this profile measured?
This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.