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Second Brain for your AI agents

Your AIs forget everything. Give them one memory they all share.

Second Brain is a small Mac app. Claude, ChatGPT, Cursor and Grok each write what they did into one memory in your own cloud. Each one reads it before it starts. You see what every AI did last, on one screen.

£499£99Price for a limited launch period
Buy Contigi's Second Brain for Mac  £99 Windows: to follow soon

60 day money-back guarantee. If it is not for you, email us within 60 days and we refund the full £99. No reason needed.

The Second Brain app icon beside its home screen: a General card for shared notes, then 4 AI agents (an inbox assistant on Cursor, research on Claude, a sales assistant on ChatGPT and social media on Grok), each showing the last thing it did and when.
Who this is for

Anyone who works with 1 or more AI models (Claude, GPT, Grok etc.), or 1 AI in more than 1 chat

  • Your AI agent on the inbox has no idea what your AI agent on sales promised yesterday.
  • You switched from one AI agent to another and lost everything it knew.
  • You want your AI agents' work written down somewhere you own, in plain files you can open.
A small-business owner at a laptop on an oak desk in a bright London office, smiling as she reads.
What you get

4 things, nothing else

Every AI at a glance

One card per AI, with the last thing it did and when. Open a card to read its whole diary, newest first.

Search everything ever recorded

Type a name, a price or a promise. Every mention from every AI, dated.

A note every AI reads

Press Add entry and file it under General. Your AIs read General before they work.

You decide what is worth remembering

7 yes or no questions each AI answers before it reports. Add your own, remove any, reset to the 7.

How it works

3 steps, set up by you, about 10 minutes

  1. Download it and open it.A signed Mac app from Contigi, checked by Apple. No account to create.
  2. Pick the cloud your AIs connect to.The app finds iCloud Drive, Dropbox, Google Drive or OneDrive on your Mac and makes a Second Brain folder inside the one you choose.
  3. Add each AI and follow its steps.The app lists your AI, writes a paragraph for it and shows the exact steps for that AI. There is also a guide for each AI on this site.
Works with the AI you already pay for: any AI that can reach your cloud folder. Claude, ChatGPT, Grok and Cursor are wired into Second Brain, which files their notes into iCloud Drive, Dropbox, Google Drive or OneDrive. An AI that can only add new files, not edit them, still joins: the app files its notes for it. Your cloud is the server. No VPS, no hosting plan and no monthly bill from us.
Works with the AI you already pay for

Any AI that can reach your cloud folder

ClaudeChatGPTGrokCursorHermes

An AI that can only add new files, not edit them, still joins: the app files its notes for it.

iCloud DriveDropboxGoogle DriveOneDrive

Your cloud is the server. No VPS, no hosting plan and no monthly bill from us.

A guide for each AI

Connect your AI in about 10 minutes

Each AI reaches your cloud folder in 1 of 3 ways: it runs on your Mac, it uses a connector to your cloud, or you paste its note into the app. Each guide gives the exact steps for that AI. Tested on 6 October 2026.

Claude Code

On your Mac. About 10 minutes.

Claude on claude.ai or in the Claude app

Through your cloud connector. About 10 minutes.

ChatGPT desktop app (Codex) and Codex

On your Mac. About 10 minutes.

Cursor

On your Mac. About 10 minutes.

Hermes

On your Mac. About 10 minutes.

Grok Bot

Through your cloud connection. About 10 minutes.

Grok and ChatGPT on the web

Through a connector, or by paste. About 10 minutes.

See all the guides

24 AI agents

Contigi and its sister property business run on this memory every day: 24 AI agents from 3 AI models (Claude, GPT and Grok) registering hundreds of dated entries since July 2026. The app is that memory, made simple enough to install yourself.

Built to be careful

Your memory is yours

Plain files you own

Every diary is a text file in your own cloud. Open it in any app. Take it with you.

Nothing is ever deleted

Entries are only ever added. Old copies go to an archive folder inside your Second Brain.

It checks itself

When 2 computers change the same diary at once, the app shows you both versions. You decide.

Contigi never sees it

No account, no tracking and no server of ours. Nothing leaves your Mac except through your own cloud app.

What it costs

One price, paid once

£499
£99
no subscription
Limited launch price

The normal price is £499.
Install it yourself with the app and it is £99, for a limited launch period.

Includes 12 months of email support from Contigi.
We reply within 2 working days.
Free updates to version 1. Works on macOS 14 (Sonoma) or later. Windows to follow soon.

60 day money-back guarantee. Try it for 60 days. If it is not for you, email us and we refund the full £99. You do not need to give a reason.

Buy Contigi's Second Brain for Mac  £99

After you pay, you go straight to a page with your download link. Read the terms, refunds and privacy notice.

Questions

Before you buy

Does my AI need anything special?

It must be able to reach your cloud folder. Some AIs run on your Mac and can edit the folder. Some use a connector to Dropbox or Google Drive and can add new notes. An AI with neither can still join: you paste its note into the app. Each AI has a step-by-step guide.

Does Contigi see my data?

No. The memory lives in your cloud. The app has no account and sends nothing to us.

What happens after 12 months?

The app keeps working for ever. Email support can be renewed if you want it.

Can I use it on 2 Macs?

Yes. Open the same Second Brain folder on each of your Macs. Your cloud keeps them in step.

What about Windows?

The Windows version is to follow soon. The memory folder is the same, so nothing is lost when it arrives.

I would rather you set it up

We do that too, for £950. See "Second Brain" set up for you.

Questions first?

Ask before you buy.

Email me and I reply within 2 working days.

Buy Contigi's Second Brain for Mac  £99 office@contigi.com