Memory that travels
Preferences, facts, and instructions follow you across providers instead of resetting every session.
Personal data stack
Intelligence that stays yours
across every model.
Persistent memory, a vault you control, and optional programs when you want them.
No spam. We’ll email when access opens.
Platform
Built for clarity.
One system for memory, access rules, and exports.
Vault you govern
Local-first options, encryption, and per-app rules so you can revoke access without losing your history.
Value on your terms
Choose what can be shared, anonymized, or licensed. See who accessed what and when.
Work that compounds
High-skill annotation and evaluation with tiers tied to quality, not just throughput.
Consent as structure
Policy isn’t a wall of text: encode purpose, duration, and combine rules as your default.
Depth over time
Longitudinal context enables better retrieval, safer defaults, and models that feel less generic.
Architecture
Designed for long-term context.
One continuity for how your context moves through time and tools. No scattered tabs. No orphaned chats.
- Embeddings and metadata stay under keys you control.
- Enterprise separates tenant boundaries without brittle copy-paste.
- Open-core clients can extend retrieval without forking trust assumptions.
How it works
Start simple. Expand when you’re ready.
Start with memory, then add team and enterprise features as you scale.
- 01
Install the layer
Run npx -y @4stax/kontxt init for a local vault and MCP wiring to Cursor or Claude Desktop; capture improves as you go.
- 02
Set your boundaries
Classify sensitivity, wire permissions, and keep an exportable record of access.
- 03
Scale when ready
Opt into marketplace programs or annotation work as your profile matures.
Early access
Help build the stack you wish existed.
We’re onboarding early customers. Tell us what must never leak and what must always carry forward.