Captio AI
🦻 Accessibility + 💻 Productivity App

Tamil live captions and productivity tool for everyday conversations

For deaf and hard of hearing people.

Download for free

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Captio AI app showing live captions

Download for free

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Use Cases

Every situation covered

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

🏪Counter conversations

Medical shop counter, ration office window, bank branch, post office. Staff speak fast in Tamil and move on. Captio AI shows what they said before the exchange ends.

🍽️Group conversations

Family dinner, Pongal gathering, wedding function with extended family. Multiple generations, fast Tamil mixing with English in Chennai and urban centres. Captio AI captions whoever is speaking.

👋Talking to strangers

Asking an auto driver for a fare, getting directions from a shopkeeper, chatting with a neighbour. People who speak at full conversational pace. Captio AI captions anyone near you.

Informal work moments

Tea break in the office, a quick question across the floor, catch-up in the canteen. The moments Tamil workplaces run on. Captio AI keeps you in those conversations.

📋Appointments and admin

Government office window, hospital OPD counter, taluk office, bank branch. Fast Tamil, sometimes formal vocabulary, no repeat expected. Captio AI transcribes everything said.

🚉Getting around

MTC or city bus conductor, asking at a railway station, auto-rickshaw conversation. Situations where you need to understand fast. Captio AI covers you anywhere.

Performance

Most accurate and fastest models

Tamil
90.4%

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 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.

Tamil

Why Tamil is hard to understand

Agglutination

  • Tamil builds extremely long words from stacked suffixes
  • Tamil is one of the most agglutinative languages in the world — a single Tamil word can express what English requires a full clause to say. In spoken everyday Tamil, these long word forms are delivered at full conversational pace with few pauses. For a lip reader, Tamil speech produces extended visual streams with almost no usable segmentation points.

Diglossia

  • Written Tamil and spoken Tamil are genuinely different languages
  • Formal written Tamil (centamil) and colloquial spoken Tamil (koduntamil) differ so significantly that linguists classify them as separate registers with different vocabulary, grammar, and phonology. What a deaf person learns in school bears little resemblance to the fast colloquial Tamil spoken at a market stall, on a bus, or at a family meal.

Sri Lankan vs Indian Tamil

  • Sri Lankan Tamil and Indian Tamil are distinct spoken varieties
  • Tamil as spoken in Tamil Nadu differs substantially from Sri Lankan Tamil — in vocabulary, phonology, and prosody. Families and communities that span both regions navigate two varieties simultaneously. A deaf person calibrated to one will miss significant portions of the other.

Code-switching

  • Urban Tamil mixes with English and Hindi constantly
  • In Chennai, Coimbatore, and Singapore's Tamil community, daily conversations switch between Tamil, English, and occasionally Hindi mid-sentence. A single street interaction can involve all three. Following the meaning requires tracking all languages simultaneously.

No ISL in daily settings

  • Tamil Nadu has the highest concentration of deaf schools — but daily life has no support
  • Tamil Nadu has one of India's highest concentrations of deaf schools, but Indian Sign Language is absent from daily public settings. Markets, transport, family gatherings, and neighbourhood shops have no interpreter and no expectation of visual language support.

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The Challenge

63 million in India. Tamil daily life excludes through speed, diglossia, and absence of any support system.

India has approximately 63 million deaf and hard of hearing people — the second-largest such population in the world. Tamil Nadu, with a population of over 77 million, carries a proportionate share of this burden. For deaf people navigating Tamil-speaking daily life, exclusion is structural: Tamil has a uniquely wide gap between formal written language and colloquial spoken language — a phenomenon linguists call diglossia — meaning the Tamil learned in school sounds nothing like the Tamil spoken at the street stall, the family meal, or the bus stop. The setting where daily life actually happens is precisely where the language is least accessible.

Tamil Nadu has one of India's highest concentrations of schools for the deaf, but Indian Sign Language is absent from everyday informal settings. Only 5% of deaf children across India attend school, and even in Tamil Nadu's schools, the transition from educational support to daily-life independence happens into a world with no interpreter provision, no captioning infrastructure, and no public accessibility standard for the informal settings — markets, transport, family gatherings — that make up most of daily existence.

India's deaf and hard of hearing population is growing, driven by high rates of noise-induced hearing loss in urban environments and limited preventative healthcare reach in rural Tamil Nadu. The infrastructure gap is widening. Captio AI captions Tamil speech in real time — including fast colloquial koduntamil, Sri Lankan Tamil, and Tamil-English code-switching — so the street stall, the bus, 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

"Spoken Tamil is completely different from what I learned in school. The street stall and the bus are fast colloquial Tamil. Captio AI follows it all. I go everywhere alone now."

Kavitha S. 🇮🇳
kavitha.s***@gmail.com
Deaf since birth, Chennai

"Coimbatore Tamil has its own pace and vocabulary. Captio AI handles it accurately. Family gatherings are something I actually participate in now."

Murugan R. 🇮🇳
murugan.r***@gmail.com
Hard of hearing, Coimbatore

"Singapore Tamil mixes with English constantly. Captio AI handles both in the same conversation. Running errands in Little India is completely different now."

Priya N. 🇸🇬
priya.n***@gmail.com
Hard of hearing, Singapore

"Sri Lankan Tamil is very different from Indian Tamil. Captio AI follows it accurately. My family gatherings mix both varieties and it keeps up with all of it."

Rani J. 🇱🇰
rani.j***@gmail.com
Hard of hearing, Jaffna

"Spoken Tamil is completely different from what I learned in school. The street stall and the bus are fast colloquial Tamil. Captio AI follows it all. I go everywhere alone now."

Kavitha S. 🇮🇳
kavitha.s***@gmail.com
Deaf since birth, Chennai

"Coimbatore Tamil has its own pace and vocabulary. Captio AI handles it accurately. Family gatherings are something I actually participate in now."

Murugan R. 🇮🇳
murugan.r***@gmail.com
Hard of hearing, Coimbatore

"Singapore Tamil mixes with English constantly. Captio AI handles both in the same conversation. Running errands in Little India is completely different now."

Priya N. 🇸🇬
priya.n***@gmail.com
Hard of hearing, Singapore

"Sri Lankan Tamil is very different from Indian Tamil. Captio AI follows it accurately. My family gatherings mix both varieties and it keeps up with all of it."

Rani J. 🇱🇰
rani.j***@gmail.com
Hard of hearing, Jaffna

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FAQ

Frequently asked questions

Follow any conversation in Tamil.

Captio AI is free to start

Download for free

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