Captio AI
🦻 Accessibility + 💻 Productivity App

Thai live captions and productivity tool for everyday conversations

For deaf and hard of hearing people.

Download for free

Download on theApp Store
Captio AI app showing live captions

Download for free

Download on theApp Store
Use Cases

Every situation covered

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

🏪Counter conversations

Pharmacy counter, convenience store checkout, government service window, bank teller. Staff speak fast in Thai and move on quickly. Captio AI shows what they said before the moment passes.

🍽️Group conversations

Family dinner, Songkran gathering, birthday meal with extended family. Multiple generations, fast overlapping conversation, central and regional tones in the same room. Captio AI captions whoever is speaking.

👋Talking to strangers

Getting a price from a street food vendor, asking for directions, chatting with a neighbour. People who speak at full tonal pace. Captio AI captions anyone near you.

Informal work moments

Coffee break in the office, a quick question across the floor, chat before the morning meeting. The moments Thai workplaces run on. Captio AI keeps you in those conversations.

📋Appointments and admin

Hospital reception, amphoe office counter, bank branch, post office. Fast Thai, sometimes formal vocabulary, no repeat expected. Captio AI transcribes everything said.

🚉Getting around

BTS and MRT announcements, songthaew or tuk-tuk driver conversation, asking at a bus terminal. Situations where you need to understand fast. Captio AI covers you anywhere.

Performance

Most accurate and fastest models

Thai
90.5%

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 conversations that don't wait

Captions as they speak, not after

Captio AI shows each word as it is spoken. You read what the person is saying while they are still saying it — not after they have finished and moved on.

No lip reading needed

You do not need to face the speaker or position yourself to see their mouth. Captio AI picks up speech from any direction — across a counter, at a table, in a busy street.

Works through background noise

Restaurants, pharmacies, busy streets, crowded waiting rooms. Captio AI separates speech from background noise so captions stay accurate where everyday conversations actually happen.

Follows any conversation

One person or six. Captio AI captions whoever is speaking at any moment — so you follow the thread at a dinner table or keep up with a counter exchange without losing track.

Any accent, any pace

People do not slow down or enunciate for you. Captio AI handles fast talkers, regional accents, and casual speech — the way people actually talk in real life.

Any language, no setup

When someone speaks a language you do not know, switch to Live Translator. They speak their language — you read in yours. No configuration needed. Works in 60+ languages.

Thai

Why Thai is hard to understand

Five tones, no lip signal

  • Thai meaning lives in pitch — which a deaf person cannot access by sight
  • Thai has five tones: mid, low, falling, high, and rising. The same syllable — 'ma', for example — can mean 'horse', 'dog', 'come', 'mother', or 'wood' depending entirely on pitch. These distinctions are carried acoustically and are invisible on the lips. Lip reading Thai provides only consonant-vowel shapes — the entire tonal meaning is missing.

Bangkok vs regional

  • Central Thai and regional varieties are different spoken languages
  • Standard Bangkok Thai differs significantly from Northern Thai (Kham Mueang), Northeastern Thai (Isan), and Southern Thai. Each has different tones, phonology, and vocabulary. A deaf person calibrated to standard Thai will miss large portions of a conversation in Chiang Mai, Khon Kaen, or Phuket.

Formal vs informal gap

  • Formal Thai and street Thai are genuinely different registers
  • Polite formal Thai is used in media, government, and formal occasions. Street Thai — especially among younger speakers in Bangkok — uses informal vocabulary, particle-heavy speech, and fast delivery. Family conversations and market exchanges happen entirely in the informal register.

Social pressure

  • Thai social norms make asking for accommodation uncomfortable
  • Thai culture places high value on maintaining social harmony ('kreng jai' — reluctance to impose on others). Asking someone to slow down, repeat, or write for you carries social cost, especially with older people or service providers. Deaf and hard of hearing Thais regularly absorb situations they did not understand rather than create social awkwardness.

No interpreter for daily life

  • Thai Sign Language is official but absent from everyday informal settings
  • Thai Sign Language (TSL) was designated the national language of deaf people in 1999. But TSL interpreters are concentrated in formal contexts — schools, hospitals, courts. For the market, the tuk-tuk, the street food stall, and the family meal, there is no interpreter and no expectation of one.

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The Challenge

300,000 deaf people. Five tones. No support for the street stall, the tuk-tuk, or the family meal.

Thailand's deaf and hard of hearing population is estimated at between 300,000 and 719,000, with a 2024 Bangkok hearing health survey finding that 2.8% of the Bangkok population has moderate or greater hearing impairment. For deaf people navigating Thai daily life, the core challenge is structural: Thai is a tonal language with five tones, all of which are carried acoustically. The same syllable means different things depending entirely on pitch — a dimension that is completely inaccessible without sound. Lip reading provides only the consonant-vowel skeleton of a Thai word; the meaning is carried by a channel that is closed to deaf listeners.

Thai Sign Language was recognised as the national language of the deaf community in 1999 — an early recognition by regional standards — but interpreter provision for everyday informal settings remains essentially absent. The market stall, the street food vendor, the family meal, and the tuk-tuk have no interpreter and no accessibility provision. A 2021 report on Thailand's deaf community documented that communication is 'a slow and painstaking process' for deaf Thais, and that the inability to access phone communication leaves them dependent on hearing intermediaries for even basic daily interactions.

Thailand's ageing population and growing urban noise exposure are increasing hearing loss prevalence. The 2024 Bangkok hearing survey documents a 53% prevalence of any hearing loss in Bangkok's population. The gap between the scale of the challenge and the daily-life support available is significant. Captio AI captions Thai speech in real time — including fast colloquial registers and regional varieties — so the street stall, the market, and the family gathering are no longer settings you have to navigate alone.

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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

"Thai tones make lip reading completely useless. There is nothing to see. Captio AI gives me actual words in real time. The street food stall and the market are mine now."

Napat K. 🇹🇭
napat.k***@gmail.com
Deaf since birth, Bangkok

"Northern Thai is a completely different set of tones from Bangkok Thai. Captio AI handles it. Family gatherings in Chiang Mai are something I fully participate in now."

Siriporn T. 🇹🇭
siriporn.t***@gmail.com
Hard of hearing, Chiang Mai

"Isan Thai is its own variety. Most captioning tools know only Bangkok Thai. Captio AI follows the regional speech my family uses. Everything changed."

Wichai P. 🇹🇭
wichai.p***@gmail.com
Hard of hearing, Khon Kaen

"Southern Thai has different tones from the standard. Captio AI handles it accurately. Going to the market alone in Phuket is completely normal for me now."

Malee S. 🇹🇭
malee.s***@gmail.com
Hard of hearing, Phuket

"Thai tones make lip reading completely useless. There is nothing to see. Captio AI gives me actual words in real time. The street food stall and the market are mine now."

Napat K. 🇹🇭
napat.k***@gmail.com
Deaf since birth, Bangkok

"Northern Thai is a completely different set of tones from Bangkok Thai. Captio AI handles it. Family gatherings in Chiang Mai are something I fully participate in now."

Siriporn T. 🇹🇭
siriporn.t***@gmail.com
Hard of hearing, Chiang Mai

"Isan Thai is its own variety. Most captioning tools know only Bangkok Thai. Captio AI follows the regional speech my family uses. Everything changed."

Wichai P. 🇹🇭
wichai.p***@gmail.com
Hard of hearing, Khon Kaen

"Southern Thai has different tones from the standard. Captio AI handles it accurately. Going to the market alone in Phuket is completely normal for me now."

Malee S. 🇹🇭
malee.s***@gmail.com
Hard of hearing, Phuket

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Download on theApp Store
FAQ

Frequently asked questions

Follow any conversation in Thai.

Captio AI is free to start

Download for free

Download on theApp Store