They serve different people and different needs. The only reliable way to choose is to ask.
When organizers hear that a deaf attendee is coming, a common reaction is to turn on captions and consider the job done. Sometimes that's exactly right. Often it isn't. Sign language and captions are different access methods for different people: a sign language is a full language of its own, while captions are written text in a spoken language. This guide explains who tends to need which, why asking is always the first step, and where AI captions fit — and don't.
American Sign Language (ASL), British Sign Language (BSL), and other sign languages have their own grammar and vocabulary. They aren't signed versions of English. For many Deaf people who grew up signing, written English is a second language, and following fast captions for an hour can be as tiring as following a meeting in any second language. A qualified interpreter delivers the meeting in their first language, including tone and emphasis.
On the other hand, many people with hearing loss — especially those who lost hearing later in life — don't sign at all. For them, captions are the access method, and an interpreter would be no help.
| Group | Often prefers | Notes |
|---|---|---|
| Deaf people whose first language is a sign language | Qualified sign language interpreter | Captions may be welcome as a supplement, not a replacement |
| People with acquired or progressive hearing loss | Captions | Many don't sign; good audio and hearing technology also help |
| Hard of hearing people who use both | Captions, interpreter, or both | Depends on the setting and fatigue |
| DeafBlind people | Specialized interpreting or tactile methods | Always ask well in advance |
"What access would work best for you — a sign language interpreter, captions, or both?" Ask on the registration form and again in person.
For sign language, use certified or qualified interpreters through an agency. Long events need a team so interpreters can rotate.
For formal events, consider human real-time captioning (CART) where accuracy is critical; AI captions suit everyday meetings.
Seat interpreters where they're visible, pin their video on calls, and share materials with them in advance.
For the trade-off between human and AI captioning, see CART captioning vs AI captioning. Legal obligations differ by country and situation; our guide to ADA live captioning requirements offers practical orientation, not legal advice.
Unicaption is an AI live captioning tool, so it serves people who read captions. It isn't sign language interpreting and doesn't replace it. Where captions are the right access method, it makes them easy to provide on any call or in person.
Large events, trainings, and public meetings often serve several people with different needs at once. Providing an interpreter and captions together is common and covers more of the audience. Captions also help hearing attendees, non-native speakers, and anyone in a noisy room. For everyday workplace practice, see workplace accommodations for deaf and hard of hearing employees.
It depends on the person. Many Deaf people whose first language is a sign language prefer a qualified interpreter, while many people with acquired hearing loss rely on captions. Some want both. The only reliable way to know is to ask them.
Not for people who rely on sign language. ASL is a separate language from English, and captions deliver written English, which may be a second language for them. AI captions like Unicaption are useful for people who read captions, but they don't replace sign language interpreting.
For employees who use captions, AI captioning such as Unicaption works well for everyday meetings and calls. For formal or high-stakes events, consider human CART captioning. For employees who sign, provide a qualified interpreter. Ask each person what works.
Book a qualified interpreter through an agency, invite them to the meeting, and pin or spotlight their video so the Deaf participant can see them throughout. Share the agenda and materials with the interpreter in advance.
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