BabelCastBabelCast
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Product

BabelCast: from one voice to every language.

A speaker talks. BabelCast turns it into live captions and natural translated speech, and everyone in the room (or across the world) follows along in the language they choose.

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Three surfaces, one live session.

Everything runs in the browser. Nothing to install for anyone.

LIVE214
Mute
Speaker · Host

Go live from anywhere

A mobile-first console: pick your mic, watch your input level, mute, and see your live listener count. Hand the session off between devices with a QR or PIN.

ESEN中文
Listener

Join with a code

No account, no app. Enter a code, then pick your audio and caption language independently, and switch either one mid-session.

ES · SPANISH
Venue · Display

Put it on the big screen

Full-screen captions for a venue screen today — and the same display view drops into OBS or ProPresenter as a browser source. Styled integrations with your branding are coming.

The pipeline

What happens between speaking and hearing.

Voice activity
Detects speech and segments phrases as you talk.
Transcription
Turns each phrase into accurate text, live.
Translation
Converts text into every target language at once.
Natural speech
Renders lifelike translated audio for each listener.
<1s
End-to-end latency
Free
Concurrent listeners
Plenty
Languages, simultaneously
1 → Everyone
One speaker, any audience

Built for hosts who can’t afford dead air.

Live health monitoringSoon

See translator status and connection health at a glance, right in the host console.

Silence alarm

If your microphone goes quiet unexpectedly, BabelCast alerts you at the speaker's console so you never broadcast dead air.

Screen wake lockSoon

Keeps the host device awake for the whole session, no mid-sermon screen timeout.

Want the full list?

Every capability for listeners, hosts, venues, and admins, laid out in full.

Explore all features

Questions, answered.

BabelCast runs a streaming cascade. Speech is segmented as the speaker talks, each phrase is transcribed to text, translated into every target language, and rendered as natural audio, all pipelined so captions land under a second behind the speaker and the translated voice follows moments later. Each target language is processed independently, so adding languages never slows the others.

A phone or laptop with a microphone and a browser. The host console is mobile-first: pick your mic, watch the input level, mute, and see your live listener count, then hand the session between devices with a QR or PIN. Listeners need only their own phones, and venue screens just load the full-screen caption display.

Yes. Every session has a full-screen caption display built for venue screens, and the same display view drops into OBS or ProPresenter as a browser source, with a separate view per language through the ?lang= parameter. Styled integrations with your branding are coming and have not shipped yet.

See it run on your next event.

Early access: be among the first when we open

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