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Audio Intelligence

Audio in.
Any language out.

Transcribe, translate, and synthesize speech — all in a single tool. Batch process entire folders. Create dubbed videos in one click. Export translated subtitles. Built for people who work with audio every day.

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Stellato — $19/month (40 hours included)* · Cancel any time

*40 hours of full pipeline processing per month (STT + translation + native TTS). Most users stay under 15 hours. Top-ups: $15 → +20 hours · $30 → +50 hours.

Three ways to work with audio

Whether you're listening, speaking, or translating — Stellato handles the whole pipeline.

STT

Speech to Text

Upload any audio or video file and get a clean, accurate transcript. Supports 90+ languages via Groq's Whisper engine.

  • MP3, MP4, WAV, M4A, WEBM
  • 90+ languages
  • Batch upload — up to 15 files
TTS

Text to Speech

Paste any text and generate natural-sounding audio. Ideal for voiceovers, accessibility, and content in multiple languages.

  • Natural-sounding voices
  • Multiple language outputs
  • Downloadable MP3
STS

Speech to Speech

The complete pipeline in one pass — upload audio in any language, receive synthesized speech in another. Transcribe + translate + re-synthesize, automatically.

  • Batch upload — up to 15 files or 6 hours per batch
  • One-click dubbed video (original never leaves your machine)
  • Translated subtitle export (.srt)
  • AI translation + 65 curated voices in 15 languages

How speech-to-speech works

Three AI models. One pipeline. No stitching required.

Step 1

Upload Audio

Drop in any audio or video file — or batch upload up to 15 at once (6-hour cap per batch). Your browser compresses files before they ever leave your device.

Step 2

Transcribe + Translate

Groq's Whisper API converts speech to text. OpenAI translates to your target language.

Step 3

Synthesize Audio

Inworld AI synthesizes natural-sounding speech in the target language. Download audio, create a dubbed video, or export translated subtitles — all in one step.

Built for serious audio workflows

Most users stay under 15 hours a month. Power users get 40 — and instant top-ups when they need more.

90+
Languages supported
3
AI models in the pipeline
$19
Flat monthly price

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Ready to move audio in every direction?

One plan. Every direction. $19/month — 40 hours included.