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Hjarni vs ChatGPT Projects

ChatGPT Projects keeps related chats, files, instructions and connected sources together. Hjarni keeps a separate Markdown note library that different assistants can retrieve.

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Quick answer

ChatGPT Projects provides persistent project context, including files, instructions and connected sources. Hjarni provides a maintained Markdown knowledge base through official hosted MCP. Choose by where you want to maintain the source material. Check the tools available in your actual project rather than assuming MCP connections are always unavailable.

Checked October 20, 2026 against OpenAI Projects guide, OpenAI connected files and collaboration. We publish Hjarni. This compares documentation, not hands-on performance.

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Hjarni and ChatGPT Projects feature comparison
Feature Hjarni ChatGPT Projects
Purpose
 Maintained Markdown knowledge base Related chats, files, instructions and sources
Persistence
 Saved notes and versions Saved project files and chats
External tools
 Official hosted MCP server Account, workspace and tool dependent
Knowledge format
 Editable Markdown notes Files and connected sources
Across assistants
 Compatible assistants use the same notes Project context inside ChatGPT
Instructions
 Account, team and folder guidance Project instructions
Export
 Active notes and attachments in a ZIP Check the particular source or generated file
Details behind the comparison
Purpose
Both support ongoing work.
Persistence
Persistence is not exclusive to Hjarni.
External tools
Check available tools and approvals in the project; there is no blanket no-MCP claim here.
Knowledge format
A project can contain documents; it is not limited to remembered facts.
Across assistants
Exporting or connecting a source is different from a shared live note library.
Instructions
Neither replaces permissions or guarantees correct retrieval.
Export
Hjarni’s standard export excludes revision history and folder instructions.

Hjarni has its own native apps. Free on every plan for iPhone, iPad and Mac and Android. Same account, same notes as the web. An internet connection is required.

Persistent work exists in both products

OpenAI documents projects as shared context for related chats, with uploaded files, project instructions and connected sources. ChatGPT also offers collaborative pages and files through Space. Check the sharing and editing workflow available in the feature you choose.

Choose where to maintain the source

Use Projects for work centered in ChatGPT. Use Hjarni when people and different compatible assistants should retrieve and update the same maintained notes. Ask the assistant to check the relevant notes and verify any saved change. Hjarni access makes a note available; it does not guarantee that the assistant will retrieve it.

When to use ChatGPT Projects

  • Your work is centered in ChatGPT projects and connected sources
  • You want related chats, instructions and files together

When to use Hjarni

  • You want a Markdown library different assistants can read and update
  • You want attributed note history and folder or team permissions
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Common questions

Common questions

What is ChatGPT Projects?

A way to keep related chats, files, project instructions and connected sources together for ongoing work. Projects provide persistent context; persistence is not unique to Hjarni. See official documentation.

Why use Hjarni instead?

Use Hjarni when you want maintained Markdown notes, attributed versions and sharing across different compatible assistants. Use Projects when work belongs in ChatGPT’s project workflow. They can coexist.

Do external tools work inside ChatGPT Projects?

OpenAI documents connected sources and tools in Projects. Available tools and approvals depend on the project, account and workspace.

Can I move my Projects context into Hjarni?

Save the relevant source files or agreed summaries as notes and check their accuracy. Project chat history, uploaded files and memory are different kinds of data; a manual transfer is not an automatic synchronization.

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