Why Rosto.
Generated once, then alive in the browser. Private, cheap, deep, and yours to keep.
The engine
Live
A real browser rig cross-fades expression frames in real time, with no AI at runtime.
Deep
One selfie yields the full FACS range of genuine, naturalistic emotion, never an exaggerated caricature.
Safe
Consented and provenance-stamped; your photo is kept encrypted only until you accept your avatar, then permanently deleted.
Yours, and free to run.
Lightweight
A few hundred kilobytes of images and one small script — and a vector edition around 170 KB that stays crisp at any size and can tilt its head. No GPU, no server, no per-message inference.
Free to run
You pay once to create it. After that it animates in the browser at zero cost, forever, with no usage bill.
Yours
The avatar belongs to you, and it runs from your own page or CDN.
Never metered. That's the whole point.
Live-avatar services bill for every minute your users spend with them — success makes your invoice grow. Rosto inverts it: creation is the only paid event, and an avatar that gets a million views costs you nothing more than one that gets ten. No per-view, per-minute or per-render charges, ever. We can promise that because the architecture earns it: there is no AI running at runtime to pay for.
Built to stay yours.
Because the avatar runs in the browser, we make copies traceable and hotlinking preventable, so your avatar does not become everyone's.
Invisible watermark
Every avatar carries a hidden, per-avatar mark, so a copy of it is traceable to who made it, and when.
Domain lock
Optionally restrict an avatar to your own domains, so it will not load anywhere else.
Revocable
Rotate or delete an avatar and it dies at the CDN edge, everywhere, at once.