Query humanity.

Answering that properly used to take a research budget, a few months, and a vendor with a very nice office. We thought an AI should just be able to ask. So we built a 1:1 synthetic population of Europe, 541 million personas living in real households in real neighbourhoods, and put it behind an API. Any AI can query it. That's the whole idea.

Europe likes to call itself one market. In practice it is dozens of markets that happen to share a currency, mostly. Ask Hiasynth about a street in Lisbon and a street in Luleå and you get answers built the same way, from the same model. Europe became one market the day it became one query.

Hiasynth is named after Hyacinth Bucket from Keeping Up Appearances, one of the strongest characters ever to grace a television.

Nobody would mistake Hyacinth for a demographic. She is a semi-detached house, a Royal Doulton tea service, a husband with a pension, and a sister she'd rather not mention. Every detail hangs together. That's the standard we hold our personas to: 541 million distinct lives, each with a household, a neighbourhood, a budget and habits that make sense together. Every one of them synthetic, every one of them true to the numbers.

Onslow, Emmet and Elizabeth are all in the stack, by the way. Onslow does the heavy lifting, which would surprise anyone who has met him.

/buːˈkeɪ/

/hi synth. As in: hi, synthetic persona. That's what we meant.

The slash is a leftover from the days when the whole product was a Discord slash command. We kept it. Hyacinth never let go of anything that sounded a bit grander than it was either.

...and you can pronounce it however you want.

Hiasynth is built in Stockholm. It was founded by Emma Agering and is backed by Further Than Capital. The model exists because Sweden AI Factory granted us a generous slice of a supercomputer. Without it, the model would've been a lot less impressive.