Captio AI
🦻 Accessibility + 💻 Productivity App

Korean 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 a far seat in a keynote hall at COEX in Seoul or BEXCO in Busan, the speaker is distant and the hall is loud. Point Captio AI toward the nearest PA speaker and read every word of the Korean keynote from any seat.

🔬Academic and research conferences

At an academic conference — a research congress at a Seoul university or a scientific meeting in Daejeon — presenters speak fast and pack talks with Sino-Korean terminology. Captio AI captions in real time and transcribes for later review.

💼Industry and professional events

Industry events, technology summits, and product launches in Seoul carry content that affects your work. Captio AI captions every speaker so you follow the panel and miss nothing.

📋Workshops and breakout sessions

In a workshop or breakout, several voices contribute in Korean from around the table. Place Captio AI on the table and follow every contribution, including from the back of the room.

🤝Networking and informal sessions

The most useful conversations often happen over coffee and at the conference dinner. Captio AI works in these noisy, informal settings the same way it does in the main hall.

🌍International and multilingual events

At an international conference in Korea, sessions switch between Korean and English. Live Translator captions foreign-language talks in real time so you follow the full programme.

Performance

Most accurate and fastest models

Korean
95.7%

character 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.

Korean

Why Korean is hard to understand

Three-way stops

  • Plain, tense, and aspirated — three where the lips show one
  • Korean is unusual in having three kinds of voiceless stop: plain (lax), tense, and aspirated. The differences are voice quality, tension, and the pitch of the following vowel — not lip shape. From a distant stage, three different consonants look identical to a deaf attendee, and technical terms turn on exactly these contrasts.

Batchim liaison

  • Final consonants that resurface on the next word
  • Korean final consonants (batchim) are often unreleased, but link onto a following vowel-initial word and can change under assimilation. A deaf attendee sees a syllable-final consonant seem to disappear, then reappear on the next word in altered form — so word boundaries and endings are unreadable from the lips.

Honorific register

  • Formal speech levels reshape verb endings
  • Conference Korean uses formal speech levels, layering honorific and polite endings onto verbs that lengthen and restructure the end of every sentence. A deaf attendee who lip-reads casual Korean meets a formal register on the podium in which the sentence-final forms carrying the point take unfamiliar shapes.

Homophones and Sino-Korean terms

  • Same-sounding academic vocabulary
  • Korean technical vocabulary draws heavily on Sino-Korean compounds with many homophones, resolved by context. In a dense research talk, a deaf attendee who misses the surrounding context cannot recover which of several identical-sounding terms was meant.

Korean–English code-switching

  • Technical English inside Korean sentences
  • Korean academic and industry talks drop English terms and acronyms into Korean sentences constantly. A deaf attendee lip-reading Korean meets English phonology on the key vocabulary, then returns to Korean, with no visual signal of the switch.

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The Challenge

Hearing loss and professional access in South Korea

Hearing loss is widespread in South Korea: a national study found minimal hearing loss in around 37% of people aged 12 and over, and the registered hearing-disabled population roughly doubled between 2010 and 2020. Yet uptake of hearing aids remains modest — regular use is reported by only around 12.6% of those with hearing loss — so a large professional population, in one of the world's most conference-intensive economies, navigates working life on unaided hearing.

South Korea hosts a vast programme of academic congresses, technology summits, and industry events at venues like COEX in Seoul and BEXCO in Busan. These run on spoken Korean delivered over PA systems, with English terms woven into technical sessions. Real-time Korean captioning of keynotes, panels, and Q&A is rarely provided, and where any accessibility exists it does not reach the breakouts and networking where careers and collaborations form.

Captio AI closes that gap. Point the phone toward the PA and read every Korean keynote and panel answer from any seat, record a dense technical session for the full transcript, and follow the conversations over coffee — so a deaf professional in Seoul or Busan gets the same value from the same conference as everyone in the hall.

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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

"The COEX keynote was formal Korean, full of Sino-Korean compounds where the plain, tense, and aspirated stops look the same to me. Captio AI captioned it from my seat and I recorded the session. I followed a full congress talk for the first time."

Jiwoo K. 🇰🇷
jiwoo.k***@gmail.com
Hard of hearing, Seoul — academic researcher

"Tech talks drop English terms into Korean on every point. Captio AI captioned both from my seat without me switching anything. I read the whole session and knew exactly what the launch meant for my team."

Minjun P. 🇰🇷
minjun.p***@gmail.com
Deaf, Seoul — industry conference attendee

"The honorific endings stretch every sentence and the batchim liaison makes word boundaries impossible to see. Captio AI captioned every audience question at BEXCO. As a panellist I answered what was actually asked instead of guessing."

Seoyeon L. 🇰🇷
seoyeon.l***@gmail.com
Hard of hearing, Busan — panellist

"Networking over coffee is where the useful conversations happen, and it used to be the part I dreaded. Captio AI captioned the informal chats at the reception so I could take part. That is where I met my first investor."

Hyun W. 🇰🇷
hyun.w***@gmail.com
Deaf, Seoul — startup founder

"The COEX keynote was formal Korean, full of Sino-Korean compounds where the plain, tense, and aspirated stops look the same to me. Captio AI captioned it from my seat and I recorded the session. I followed a full congress talk for the first time."

Jiwoo K. 🇰🇷
jiwoo.k***@gmail.com
Hard of hearing, Seoul — academic researcher

"Tech talks drop English terms into Korean on every point. Captio AI captioned both from my seat without me switching anything. I read the whole session and knew exactly what the launch meant for my team."

Minjun P. 🇰🇷
minjun.p***@gmail.com
Deaf, Seoul — industry conference attendee

"The honorific endings stretch every sentence and the batchim liaison makes word boundaries impossible to see. Captio AI captioned every audience question at BEXCO. As a panellist I answered what was actually asked instead of guessing."

Seoyeon L. 🇰🇷
seoyeon.l***@gmail.com
Hard of hearing, Busan — panellist

"Networking over coffee is where the useful conversations happen, and it used to be the part I dreaded. Captio AI captioned the informal chats at the reception so I could take part. That is where I met my first investor."

Hyun W. 🇰🇷
hyun.w***@gmail.com
Deaf, Seoul — startup founder

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FAQ

Frequently asked questions

Follow every speaker in Korean.

Captio AI is free to start

Download for free

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