Reading, not speaking
Most synthetic voices still sound like a page being read aloud. Pauses land in the wrong places, emphasis falls flat, and long form audio starts to grate within a minute.
AI voice generation - genuinely realistic
Live studio
One script.
Every voice. Every tone.
Every language.
Koythu turns a single line of text into audio that sounds like a real person spoke it - across a library of voices, a range of emotional tones, and multiple languages. Content, IVR, audiobooks, product voice, all from one surface.
Consented cloning Natural prosody Seconds to render
Now rendering
"Welcome to our store. How can I help you today?"Retail IVR
Script
Welcome to our store. How can I help you today?
Aanya
Warm, calm, neutral urban
Rohan
Deep, formal, broadcast
Meera
Bright, expressive, retail
Your clone
Custom, consented voice
Synthetic voices still betray themselves in three ways. Every one of them fixable.
Five languages, five recordings
Producing the same script in Hindi, English, Marathi, Tamil and Bengali usually means five voice actors, five studios and a coordination overhead that outweighs the content itself.
A brand that never sounds the same
The IVR uses one voice, the explainer video another, the app a third. Nothing carries across the surfaces where a brand actually meets its audience.
From a written line to a rendered voice, in four unbroken stages.
Every generation moves through the same four stages. You can stop, adjust, or branch at any of them.
01
Write
Type or paste the script you want voiced. Long form, short form, structured, or raw.
02
Choose
Pick a voice from the library, or use a consented clone of a real voice you have rights to.
03
Tune
Adjust tone and pacing - calm, warm, urgent, formal - and the delivery shifts in place.
04
Generate
A natural sounding audio file, ready in seconds, in the language you asked for.
Four concrete capabilities. No handwaving.
Natural prosody
Pacing, breath, pauses and emphasis modeled on how real people speak, not on how a screen reader announces a page. Emphasis lands where the sentence expects it.
Emotional tone control
The same script rendered calm, warm, urgent or formal on request. Tone is a parameter, not a re recording, so a single line can carry four registers on the same page.
Consented voice cloning
A real voice reproduced accurately, gated behind explicit verified consent from its owner. Usage is scoped, auditable and revocable at any time.
Multi language delivery
The same script rendered naturally across supported languages - not machine translated then read flat. Cadence and stress adapt to each language.
Studio without a studio, or an API without a queue.
For content creators
Narration, dubbing and audiobook production - without booking a booth.
Generate long form narration in seconds, produce localised versions of the same video in a dozen languages, and keep a single character voice across an entire series.
Explore for creatorsFor developers and businesses
A voice API for IVR, apps and products that need to sound consistent.
A REST API with predictable latency, streaming audio, common output formats, and dedicated support at business scale. Deploy the same voice into every surface.
Explore for developersTime to first audiounder 4sMedian for a 20 word script on a standard voice.
One script, many voices40+Voice profiles across genders, ages, registers and accents.
Languages in delivery12 liveMore being added. Cadence adapts to each language, not translated flat.
Cloning consent100% verifiedEvery cloned voice carries a signed, revocable consent record.
One studio. Five distinct capabilities.
Each capability has its own page inside the studio, with worked examples and honest current state notes.
Listen booth
Type a sentence. Hear it in the voice you pick.
Not a form. Not a wait list. Your own line, rendered on this page, in a voice and tone of your choosing - a live preview of the studio.
AanyaWarm tone
Same script. Change voice and tone to compare in place.