Facial grammar
Sentences are signed clause by clause, and questions and negation are carried on the face and head — the non-manual markers ASL uses.
What it does
What SimuSign does today
Type or speak English and a 3D signer performs it in American Sign Language. Real-time English-to-ASL for conversation: a rules-based grammar engine and a 3D avatar sign each sentence a few seconds after it's said. Fast speech, meetings and long videos fall further behind. Not a replacement for a live interpreter. Words outside our sign vocabulary are fingerspelled and marked. The status shows how far behind the signer is, and anything the session could not hear is marked in the transcript. SimuSign is in Early Access.
Capabilities
What SimuSign actually does
What SimuSign does today, in Early Access. What it can't do yet is on our honest limits page.
Fingerspelling for names and new words
Words outside our sign vocabulary are fingerspelled with letter-to-letter transitions, and the camera eases in so you can read them. Spelled words are marked as spelled. Live signing can fall behind speech; the status shows how far behind, and anything the session could not hear is marked in the transcript.
Live signing
Real-time English-to-ASL for conversation: a rules-based grammar engine and a 3D avatar sign each sentence a few seconds after it's said. Fast speech, meetings and long videos fall further behind. Not a replacement for a live interpreter. Works with your microphone, or with a browser tab's audio in Chrome and Edge.
Co-articulation
Signs flow into one another, the way a signer moves from one sign to the next, instead of stopping between words.
Signs authored by our team
Every sign is authored by our team, and we keep refining them during Early Access.
Pop-out signer
Pop the avatar out into a small always-on-top window and keep it beside a meeting, a video or anything else on your screen — in Chrome and Edge, or as a video-only picture-in-picture in Safari. Fast speech, meetings and long videos can fall a minute or more behind. Not a replacement for a live interpreter.
Use cases
Where it fits today
Where SimuSign fits during Early Access — each one with its edges stated.
ASL learning and grammar study
A live grammar demonstrator: type a sentence and see the structure — reordered clauses, question and negation markers on the face.
ASL students, families, interpreter traineesFingerspelling practice
Receptive fingerspelling is famously the first skill learned and the last mastered. Watch any word — including names — spelled with continuous letter-to-letter transitions and an automatic close-up camera. Adjustable-speed drills are live in our Fingerspelling Trainer — slow it down until you can read it, then speed it back up.
ASL students, interpreter training programsEveryday typed messages
Type a quick message and let the avatar sign it — for everyday moments between hearing and Deaf family members and friends. Not for medical, legal, emergency or other high-stakes communication.
Families with Deaf members, friends, colleaguesLive voice and video
Stream your microphone or a meeting or video tab's audio and pin the pop-out signer beside it. Fast speech, meetings and long videos can fall a minute or more behind. Not a replacement for a live interpreter. In Early Access — words outside our sign vocabulary are fingerspelled, visibly.
Deaf & hard-of-hearing early adoptersVenue and organization content
Announcements, public notices, onboarding and training, customer-service information, recorded video and learning programs, signed in ASL with captions alongside. Enterprise plans come with V1 in December.
Venues, public services, schools and teamsCurrent capabilities and limitations
SimuSign is in Early Access. It is not a replacement for a live interpreter and is not intended for medical, legal, emergency or other high-stakes communication at this time.
For everything SimuSign can and can't do today, see our honest limits page.
See it sign your words
Start free — type a sentence and see how SimuSign orders it for ASL, fingerspelling included.