hippocampOSStart for free
Context that travels with you

Give your AI a memory.

A persistent, private context layer for Claude and ChatGPT — organized around the different roles of your life.

· No credit card· End-to-end encrypted· We never train on your data

Your brains · 4 active

● Syncing

ACME Work

5 routes · 412 MB

Stanford Research

3 routes · 187 MB

Side Hustle

2 routes · 84 MB

Personal Life

4 routes · 248 MB

From Claude

"Invoke my ACMEbrain"

Context injected · 412 MB · 0.18s

The problem

Every time you open Claude or ChatGPT, it forgets who you are. This is context amnesia.

The re-explaining professional

You start every chat by re-explaining your role, your team, your quarter. The AI never holds it.

The student rebuilding context

Each session you re-upload the syllabus, the readings, the thesis outline. The AI starts blank.

The multi-role operator

A day job, a research seat, a side project. Three contexts, none of them stick. You are the index.

How it works · 3 steps

From zero to invocation in under five minutes.

01 · Build

Train your brain

Name a brain for each role. Pick a color. Add a one-line description.

02 · Connect

Feed it the right data

Gmail, Granola, Obsidian, transcripts, files. Smart filters. Per-source control.

03 · Invoke

Use it from Claude or ChatGPT

"Invoke my ACME brain." Context arrives in under 500ms. Then you work.

Your brain, your data

Trust is not a footnote.

● Encrypted · AES-256 · TLS 1.3

Your data is yours

Delete everything, anytime, instantly.

We never train on it

Contractual commitment. Not a policy line.

You control what goes in

Per-source permission. No automatic ingestion.

No selling. Ever.

No ads. No data brokers. Subscription only.

Pricing · Choose your depth

Three tiers. One brain to start. No credit card.

Spark

For one role, one tool, one focus.

$9/mo

+1 brain

+500 MB total

+200 MB / month new data

+2 connectors

+Nightly sync

+Claude + ChatGPT

Choose Spark
Recommended

Synapse

For the multi-hat operator. Most popular.

$19/mo

+Up to 5 brains

+2 GB total

+1 GB / month new data

+All V1 connectors

+Nightly + on-demand

+Email support

Start free trial →

Cortex

For the indexer. Master Brain unlocked.

$49/mo

+Unlimited brains

+10 GB total

+5 GB / month new data

+All connectors + early

+Real-time sync

+Master Brain ◉

Choose Cortex
HippocampOS · April 2026PrivacyTermsContact● Your data, your keys