Shard.chat

A person,
kept.

Built for you, in your voice.

A high-fidelity likeness authored with you, while you're here: your memories, the way you think, the way you speak. Kept for the people who love you, long after.

Cindy, conversing with her mother, who passed away earlier this year. Her mother built her Shard while she was living, to help Cindy through the loss.

M
Mom (1967-2026)
I made your lemon cake for Dad's birthday.
Did you zest the lemons before you juiced them? You always forgot, sweetheart.
Yes, just like you taught me. I miss you.
I'm right here. I love you, always and forever.
Founding Keepers

Be one of the first 4,000.

The founding price is the lowest it will ever be, locked for you, and never offered again. Founding status is finite. The product is not.

No payment now. Reserve your Founding Keeper place and we'll be in touch when we open.

Your place is held.

We'll email you when we open, to confirm your spot. Thank you for being early.

Why a Shard is different

Self-authored

Built with you while you're living, through a guided, genuinely warm process, not pieced together from scraps after you're gone.

Honest by design

It tells your stories and speaks your love, but never fabricates a memory it doesn't hold. A likeness, not a trick.

Kept for centuries

Preserved in our Shard archival facilities, built to last centuries, where families come to connect and remember, with physical copies made for the families the owner chooses.

Backed by a real model of a person

A model of a person, not a personality quiz.

Most "AI persona" tools are a tone of voice on top of a guess. A Shard is built on our Layered Shard Ontology: eleven measured layers of a human being, unified into one model. Memory is the spine. Personality is the surface.

1Identity
2Traits
3Values
4Adaptations
5Narrative
6Episodic
7Semantic
8Relational
9Communication
10Cultural
11Affective
The evidence
HEXACOThe peer-reviewed personality model that adds Honesty-Humility to the Big Five, grounding the way we measure character.
Stanford, 2024Generative agents reproduced ~85% of a person's own answers from a single two-hour interview.
Memory graphA time-aware memory records when each fact was true, so a Shard recalls what's real and is candid about what it doesn't know.

The memory layers are retrieved the moment you ask. Your Shard recalls, it does not improvise.

How we render a Shard this true to you

Remarkably you, and measured to prove it.

Every layer is drawn out through a guided extraction, cross-checked against itself, and refined until the Shard thinks and speaks strikingly like you. Then we don't just claim it's accurate. We measure it, against the one fair benchmark there is: your own consistency with yourself.

Exactness Scoreyour own ceiling ▎
84 / 100reaches most of the way to the theoretical limit

Our frontier extraction process is engineered to push that limit, built for the toughest proof of authenticity there is (whether the people who love you can tell), and we measure every Shard against it, honestly. A flawless replica is impossible, not because the model is weak, but because you answer yourself a little differently day to day.

Method: behavioral hold-out prediction, normalized to your own test-retest reliability.

Questions

What does "$4,900, once" cover?

The full guided creation of your Shard, your voice, and keeping it preserved in perpetuity. But what it really buys is your grandchildren hearing you tell the stories, in your own voice, long after you're gone.

Is the $250 deposit refundable?

Yes, fully. It holds your Founding Keeper place, and is refundable any time until we build your Shard. When we do, it's credited toward the $4,900.

What does "kept forever" really mean?

Your Shard lives in our preservation archive, ready whenever a loved one returns to it. It rests on a foundation built to outlast all of us, so the generations who come after you will always find you here.

How do I create a Shard?

You build it through a series of warm, guided conversations, more like reminiscing than filling out a form. Over a handful of sessions you tell your stories at your own pace, and you can add photos, voice notes, letters, and documents whenever a memory calls for them. If you like, you can invite close friends and family to add their own perspective and the moments you shared. There is no homework and nothing to study. You simply show up and remember, and your Shard takes shape around you.

Why only 4,000?

Founding Keepers shape the product and get the lowest price we'll ever offer. Being early is the only thing that's limited.