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Every time you switch between ChatGPT, Claude, Gemini, or any other AI tool, you start from zero. No memory of what you’re working on. No context about how you think. No continuity. 4StaX fixes that. It’s a personal data OS built for the AI era. It starts with a cross provider memory layer and expands into a full data vault, marketplace, and intelligence platform where you own, control, and optionally monetize your data.

Memory

Persistent context across every AI provider you use

Vault

Encrypted storage with granular permissions and full audit trail

Developers

Open source MCP server. Run it locally today

Quickstart

Get memory running in under 5 minutes

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The stack

The name 4StaX refers to the four layers that compound over time:

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How people use it

  • Developers who switch between Cursor, Claude Desktop, and ChatGPT and are tired of re-explaining their stack every session
  • Power users who want their AI interactions to actually build on each other over time
  • Teams who need shared memory with proper access controls and audit trails

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What exists today

4StaX is in early development. Here’s exactly what works right now versus what’s coming.

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Platform map (5 layers)

4StaX is designed as five layers, from local memory to hosted enterprise surfaces. kontxt implements Layer 1 today.