Captio AI
🦻 Accessibility + 💻 Productivity App

English live captions and productivity tool for conferences & events

For deaf and hard of hearing people.

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Captio AI app showing live captions

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Use Cases

Every situation covered

Designed for the real moments that matter — not just quiet controlled environments.

🎤Keynotes and main stage talks

From row 30 of a keynote hall at a London or San Francisco conference, the speaker is a distant figure and the acoustics are unforgiving. Point Captio AI toward the nearest PA speaker and read every word of the keynote from any seat.

🔬Academic and research conferences

At an academic conference — a research symposium in Oxford or a scientific congress in Boston — presenters speak fast and pack talks with terminology. Captio AI captions in real time and transcribes for later review, so you follow the argument and keep a record.

💼Industry and professional events

Industry events, product launches, and analyst briefings deliver content that affects your work directly. Captio AI captions every panellist and presenter so you miss nothing professionally relevant, whether in a Manhattan ballroom or a Dublin tech summit.

📋Workshops and breakout sessions

In a breakout or workshop, multiple voices contribute from around a table, including from the back of the room. Place Captio AI on the table and follow every contribution, not just the facilitator at the front.

🤝Networking and informal sessions

The most useful conversations often happen in the hallway, at lunch, and at the evening reception. Captio AI works in these noisy, unstructured settings exactly as it does in the main hall, so networking is not the part you have to skip.

🌍International and multilingual events

At an international conference, keynotes and panels switch between English and other languages. Live Translator captions foreign-language sessions in real time, so a multilingual programme becomes one you can follow end to end.

Performance

Most accurate and fastest models

English
93.5%

word accuracy

independent benchmark, 2025

< 200ms
you speak
captions

real-time captions

first word appears as you speak

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Captio AI in everyday use
Why Captio AI

Built for the room where you cannot ask anyone to repeat

Live captions from any seat

Point the phone toward the nearest PA output or speaker. Captio AI captions whoever is presenting in real time — from the front row or the back of a large conference hall.

Works without venue infrastructure

No hearing loop, no captioning service, no advance booking required. Captio AI works independently via microphone — whether or not the venue has provided any accessibility infrastructure.

Covers what official captioning does not

Official captioning, where it exists, typically covers the main stage only. Q&A sessions, workshops, breakouts, and networking are usually left uncaptioned. Captio AI covers all of it.

Record and review after

Record any session and upload it to Audio Transcription for a full written record. Use AI Summary to extract key takeaways — useful for dense technical content you want to process at your own pace.

60+ languages

For international conferences, foreign-language keynotes, or multilingual panels. Live Translator captions and translates in real time across 60+ languages with no manual switching between speakers.

Works for networking too

The conversations in hallways and at lunch matter as much as the sessions. Captio AI works in any setting — informal, noisy, unstructured — the same way it works in the main hall.

English

Why English is hard to understand

Accent diversity

  • One conference, a dozen different mouths
  • An international English conference puts speakers from Britain, the US, India, Nigeria, and Australia on the same stage in a single afternoon. A deaf attendee who lip-reads one accent fluently is left behind the moment the next keynote speaker opens with a different vowel system. From row 30 you cannot ask a Scottish presenter or a Texan panellist to slow down.

Dental fricatives

  • The 'th' sounds vanish exactly where the jargon lives
  • English 'th' — in 'theory', 'threshold', 'through-put' — is made with the tongue between the teeth and produces almost no visible movement. Technical talks are full of these sounds, and from a distance the most information-dense words in a keynote are the ones a lip-reader can least see.

Fast connected speech

  • Panel Q&A blurs word boundaries
  • In a fast panel, English collapses into a stream — 'did you' becomes 'didja', 'want to' becomes 'wanna', and panellists talk over each other. The overlapping, reduced speech of a lively Q&A is exactly where individual words become impossible to segment from the lips.

Weak-syllable reduction

  • The grammar words disappear at speed
  • English reduces unstressed function words — 'of', 'to', 'and', 'for' — to a faint schwa. At the pace of a confident keynote, this connective tissue drops out visually, leaving a deaf attendee with disconnected content words and no clear sense of how a complex argument holds together.

Vowel shifts across Englishes

  • The same term looks different on each speaker
  • The trap–bath split in British English, the Northern Cities shift in American English, and the vowel systems of Australian and South African English mean one technical term looks different on different speakers' lips. Across an international panel, a deaf attendee has to re-calibrate for every voice.

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The Challenge

Hearing loss and conference access in the English-speaking world

In the UK, more than 18 million adults are deaf, have hearing loss, or have tinnitus, according to RNID — with 2.4 million unable to hear most conversational speech. In the United States, around 38 million people have significant hearing loss, and the National Institute on Deafness estimates 28.8 million could benefit from hearing aids. Many of these people are professionals: the researchers, analysts, and specialists who make up conference audiences, paying the same registration fee as everyone else.

Research on deaf and hard of hearing inclusion in professional organisations has found that barriers persist even in fields that have invested in accessibility — poor conference-room acoustics and the limits of remote captioning services among them. Where captioning is provided at all, it usually covers the main stage only. Q&A sessions, where a single roving microphone is passed around a large hall, routinely leave gaps; breakout sessions, workshops, and networking receptions are almost never covered. The parts of a conference that demand the most active communication have the least accessibility infrastructure.

Captio AI closes that gap. Point the phone toward the PA and read every keynote, every panel, and every Q&A answer from any seat; record a dense technical session for the full transcript; and follow the networking conversations in the hallway — so a deaf professional gets the same value from the same event, in the main hall and everywhere the official captioning never reaches.

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Privacy

What you hear stays with you.

Gone the moment it ends

Captio AI processes your audio in real time and discards it immediately. Nothing is recorded. Nothing is kept.

Not a product

Your conversations are not something Captio AI sells, shares, or monetizes — to anyone, for any reason.

Not used to train anything

What you say in a doctor's appointment or a job interview never ends up in a training dataset. Not ours. Not anyone else's.

100% PRIVATE

Private by default

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Reviews

People love Captio AI

"I go to industry conferences constantly, and official captioning always stops at the main stage. Captio AI gave me better captions than most of the paid services I have seen — and it covered the breakouts and the networking reception, which is where the real conversations happen."

Rachel F. 🇬🇧
rachel.f***@gmail.com
Hard of hearing, London — industry conferences

"The scientific talks are fast and dense with terminology, and from the back of a big lecture hall I used to catch fragments. Captio AI captioned the keynote from row 25 and I recorded the session for the full transcript. I followed the whole argument for once."

David O. 🇺🇸
david.o***@gmail.com
Deaf, Boston — academic researcher

"Panel Q&As were impossible — panellists talking over each other, the mic passed around, accents from everywhere. Captio AI kept up with all of it. I read every answer as it was given instead of piecing it together afterward from someone's notes."

Aoife M. 🇮🇪
aoife.m***@gmail.com
Hard of hearing, Dublin — tech summit attendee

"As a presenter I have to follow the questions from the floor. American, British, and Australian accents in the same room used to blur together for me. Captio AI captions the question no matter whose accent it is, so I answer what was actually asked."

Marcus L. 🇦🇺
marcus.l***@gmail.com
Deaf, Sydney — international conference speaker

"I go to industry conferences constantly, and official captioning always stops at the main stage. Captio AI gave me better captions than most of the paid services I have seen — and it covered the breakouts and the networking reception, which is where the real conversations happen."

Rachel F. 🇬🇧
rachel.f***@gmail.com
Hard of hearing, London — industry conferences

"The scientific talks are fast and dense with terminology, and from the back of a big lecture hall I used to catch fragments. Captio AI captioned the keynote from row 25 and I recorded the session for the full transcript. I followed the whole argument for once."

David O. 🇺🇸
david.o***@gmail.com
Deaf, Boston — academic researcher

"Panel Q&As were impossible — panellists talking over each other, the mic passed around, accents from everywhere. Captio AI kept up with all of it. I read every answer as it was given instead of piecing it together afterward from someone's notes."

Aoife M. 🇮🇪
aoife.m***@gmail.com
Hard of hearing, Dublin — tech summit attendee

"As a presenter I have to follow the questions from the floor. American, British, and Australian accents in the same room used to blur together for me. Captio AI captions the question no matter whose accent it is, so I answer what was actually asked."

Marcus L. 🇦🇺
marcus.l***@gmail.com
Deaf, Sydney — international conference speaker

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FAQ

Frequently asked questions

Follow every speaker in English.

Captio AI is free to start

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