We set up a private second brain for your household. We gather what lives in inboxes, school portals, voice notes and people’s heads, connect it to the AI assistant you already use, and keep it in good order as life changes.
It’s also in four inboxes, two calendars, a school app, a group chat and one parent’s head. AI assistants are finally good enough to help run a household. They can’t help with what they can’t find, and they shouldn’t see everything they can.
A second brain for the whole household, set up and looked after by us. Keepsake turns what your family knows into a tidy, private library that your AI assistant can read. Every fact says where it came from. Every person only sees what they should.
A folder of text files that you control. Open it in any editor. Leave whenever you like and take all of it with you.
Who told us, when, and has anyone checked since? Keepsake can answer that for every fact it holds.
When an allergy or a dose changes, the old entry stays and points to the new one. You can always see what changed.
Works with Claude, ChatGPT and whatever comes next. The brain will outlast any one app.
Families aren’t one user. Keepsake keeps separate spaces for the people who need them. The nanny’s assistant sees meals, naps and allergies. It can’t see your finances, because they were never put in its room.
householdKids, schools, home, routinesadultsMoney, insurance, legalcaregiverWhat the nanny needs, nothing morejonahA 16-year-old’s own deadlines and draftsco-parentingShared with his mum across towncarlos-careGrandad’s medical notes, restrictedsiblingsSummaries for the aunt and uncleA fictional family from our open-source example. In their brain it’s Monday 15 March 2027. The same question gets a different answer depending on who asks.
We map who’s in your family, what you’re juggling and which assistant you use. You leave with a plan whether or not you hire us.
We connect inboxes, calendars and school portals, transcribe voice notes and file everything with its source. Each person who needs a room gets one.
A short check-in. We clear what’s gone stale, fold in what’s new and tune the helpers that write your weekly family agenda.
A teenager leaves home, a parent needs care, or you want to run it yourselves. We hand over the keys and a written manual.
“Dad’s medications lived in three spreadsheets, a group chat and my memory. Now my brother gets a summary after every appointment, and I’m not the switchboard any more.”
“Our nanny asks her assistant what the kids can eat and gets the right answer. She can’t see our bank statements. That was the part that sold me.”
“Co-parenting arguments used to be about who said what. Now we look at the receipt, with a date on it, and move on.”
“My son keeps his college deadlines in his own space. I see the dates and the fees, not his essays. He thinks that’s fair. So do I.”
Every family is different, so we price after the first call, once we know what you’re juggling. The call is free.
Keepsake is our service. Underneath it is Onto, an open-source format for family knowledge. Your brain is a folder of plain files that follows a public specification, so you are never locked in to us or to any AI company.
Every fact is its own small record, with a source, a date and the room it lives in. Here is one from the Ferreira-Holts.
You, and the people you give a room to. During setup and upkeep we work in your accounts under a written agreement that lists exactly what we can touch. The files live where you choose: your own computer, your own cloud drive or a private repository.
Any assistant that can read files. Most of our setups use Claude or ChatGPT today. Because the brain is plain text, you can switch assistants without starting again.
Nothing breaks. You keep a folder of plain text files and the open Onto specification that describes them. Any capable assistant, or any person, can read it.
No. Keepsake is built for adult children managing a parent’s care, co-parents across two homes, families with a child on an IEP, and grandparents who want the family story written down.
About two hours during setup, spread over the first fortnight. After that, around twenty minutes a month.
I’ll be the one at your kitchen table. By day I’m a Senior Product Manager at AWS, where I lead product for the core customer record in Amazon Connect: the data object every Connect team builds on, at more than a billion records a year.
Before that I owned a graph-ontology data layer that let AI agents work safely with regulated government and healthcare data. I shipped my team’s agentic skills layer, version-controlled prompts for Claude and Kiro that anyone could extend, and built an LLM-queryable knowledge base that replaced our stale wikis. I steered multi-million-dollar engineering investments in knowledge graphs, healthcare interoperability and GovCloud.
Keepsake is that same work at household scale: an ontology for your family’s facts, a source and a date on every one, and rooms that decide who sees what.
I didn’t start in tech. I trained as a chemist, brewed award-winning beer, co-founded a drinks company and ran a robotics pilot for Tesco. A lab notebook teaches you to write down where every result came from, and that habit runs all through Keepsake. I live in Bronxville and co-founded Dusty, a 7,000-strong run club in New York.
Forty-five minutes, free, no slides. Tell us a little about your household and we’ll suggest a time.