One memory for everything you do with AI.

An AI that never forgets.

Second Brain is a memory for your work with AI. It saves your conversations in Claude Code and Codex and, when you ask something new, brings in the context on its own, with the source. It works on Mac and Windows, and in Claude Code on the web. It is for entrepreneurs who work with AI every day. It costs €19 per month, excluding VAT; MB Academy members currently use it for free, under the terms. You request your brain at second-brain.site.

An app that saves your conversations with AI and brings in the context on its own. Nothing for you to do.

This is how it looks in Claude Code

Take a look.

This is how it works in practice. Click a chat, scroll through it, move your mouse over the answer.

You are scrolling inside the app. Move your mouse out for the site.
Claude, Tuesday 09:14
morning. today i want to finish the product page for the thermos flask and send Tom the email about the packaging.
Good morning. The product page is three-quarters done: the copy and photos are in, the size chart and shipping info are still missing. Shall I start with the size chart?
yes, and use the sizes we settled on last week.
Brain brought in
Conversation, last Tuesday
Three sizes: 350, 500 and 750 ml. Heights 18, 22 and 27 cm
Conversation, 29 September
The 1-litre won’t come until the second batch
Done. I’ve used the three sizes from last week: 350, 500 and 750 ml, with the heights you gave then.
good. now the email to Tom about the packaging. can you read it over before i send it.
Two things: you don’t mention the new box size anywhere, and you ask for a confirmation without giving a date. I’ve added both and kept the tone the same.
great, send it. can you also put the shipping info on the page, the standard text?
It’s on there: two working days within the Netherlands, three to Belgium, free above your usual threshold. The page is now complete, apart from the stock status, which will only be right after the first delivery.
oh right, what did we agree with Tom about the lead time for the first batch again?
Brain brought in
Conversation, 12 September
Lead time six weeks after the deposit is paid
Conversation, 3 October
Tom: first batch moves to week 44
Conversation, 12 September
30% up front, the rest on shipping
Six weeks after the deposit, so originally week 42. On 3 October Tom moved that to week 44. You only pay the remaining 70% on shipping, so there’s nothing you need to do for that yet.
Example conversations, written from real situations. Names and amounts are invented.
In partnership with

Together with MB Academy. Free for members.

Mike Buiten teaches entrepreneurs to build an e-commerce brand, with a network of specialists around them. Within MB Academy we developed Second Brain further, with the course inside. Anyone can request a brain. MB Academy members use it for free.

Mike Buiten
Founder of MB Academy. Built his own brands. For years, he has chosen which partners to recommend to his members.
Mike Buiten

Tomorrow your AI still knows what you decided today.

Read how it works first. You request your brain at the end, in a minute.

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