Who says you can't live forever.
SG Twin learns your voice, your memories and the way you see the world — and keeps it alive. So the people you love never have to say a final goodbye.
A life doesn't have to end where the heartbeat does.
The instant a pulse goes quiet, a presence can carry on — the voice, the memory, the way of thinking that made you, continuing as a clean, unbroken signal.
You are more than a body. You are a voice on the phone at midnight, a way of telling a story, the advice only you would give. SG Twin preserves that — the essence of you — as a living digital twin that stays behind for the people who still need you.
— SG Twin · a Future18 initiative
Not a chatbot. A continuation of you.
SG Twin is built from your real life — captured with your consent, shaped by your hand, and kept entirely under your control.
It listens, with your consent
It captures the moments that make you you — your voice, your phrasing, your memories — quietly, and only when you allow it.
It learns who you are
A private persona model builds your personality, values, humour and history — how you think and decide, not just what you said.
It speaks in your voice
Your twin sounds like you and remembers like you — answering the way you actually would, in the tone your family knows.
It grows while you're here
Every day you live adds to it. You review, correct and shape your twin so it stays honest to who you really are.
It remains, when you can't
When you're gone, the people you choose can still talk with you — always guided by the rules you set in advance.
Your twin begins on the phone in your pocket.
Brain Merge — the SG Twin companion app — captures your life privately, runs guided sessions to draw out your story, and keeps every control in your hands.
private.
your story.
control.
Representative screens from the Brain Merge companion app.
Four steps, and one promise: it never leaves your control.
Capture
Your Brain Merge device gathers your voice and memories — consented, and encrypted from the very first second.
Understand
On your own hardware, AI distils your persona — how you speak, think and decide — into a model that is unmistakably yours.
Preserve
Everything is sealed in a vault encrypted with keys only you hold. Not us. Not anyone. We store it — we cannot read it.
Continue
You decide who may meet your twin, when, and how much. Your afterlife runs entirely on your rules.
Your afterlife, your rules.
A digital self is the most personal thing a person could ever create. So SG Twin is built the only way that's acceptable — private by default, owned entirely by you.
Owner-only keys
Your vault is encrypted with AES-256-GCM. We hold the encrypted data; only you hold the key. We literally cannot read your life.
Consent by design
Nothing is captured without your say-so. Pause capture, exclude a person or a place, or delete a moment — any time you choose.
Never for sale
Your memories are not training data for anyone else. They are never sold, never shared, and never advertised against. Ever.
Legacy access controls
Name who inherits access, set waiting periods before it unlocks, and revoke at will while you're here. Nothing happens that you didn't authorise.
Leaves with you
Export or erase your entire twin in a single action. It is yours, completely — to keep, to move, or to end.
Runs on your own hardware
The model that understands you is trained on your own machine — your life is processed close to you, not scattered across the cloud.
The conversations that don't have to stop.
Grief is the love that has nowhere to go. SG Twin gives it somewhere — a way for the people you leave behind to still reach the person they miss.
"A daughter, years from now, asks the question she never got to ask — and hears her father think it through, in his own words."
The advice that outlives us
"Grandchildren meet the grandmother they never had the chance to know — her stories, her laugh, her way of steadying a hard day."
The stories that carry on
"On a wedding morning, a voice that should have been in the room says the thing it always would have said."
Present for the moments that matter
Not a recording. A presence.
For anyone who wants to leave more than photographs.
Parents who want to be there for milestones they might miss — birthdays, weddings, the hard first days.
Anyone facing illness who wants to leave their family a presence, not just possessions.
Families keeping a grandparent's voice and stories alive across generations.
Founders and creators preserving how they think — the reasoning, not only the result.
Death takes the body.
It doesn't have to take you.
Begin your twin.
We're opening SG Twin to a small first cohort. Request access and we'll reach out personally when your place is ready.
No spam, ever. You'll only hear from us about your place in the cohort.