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Fish Audio announced the public launch of S2.1 Pro and a $52M Seed raise (tweet…

2026-07-28 · 18:20 UTC ·@DataChaz ·1 min read

Brief

Fish Audio launched S2.1 Pro (public) while announcing a $52M Seed raise, positioning the model for multi-agent voice infrastructure with claims of 2× speed vs. Cartesia and 1/6th the cost of ElevenLabs. S2.1 Pro supports 83+ languages, 5‑second voice cloning, word-level expressive control, on‑prem zero-data retention, and already runs in production at several companies.

Why it matters

Fish Audio announced the public launch of S2.1 Pro and a $52M Seed raise (tweet dated 2026-07-28); the company claims S2.1 Pro is 2× faster than Cartesia and costs 1/6th of ElevenLabs.

Key details

  • S2.1 Pro can clone a voice from 5 seconds of audio, supports 83+ languages, and offers word-level control over emotion, intonation, pacing and delivery; it can run on-prem with zero data retention.
  • Fish Audio reports production use by HeyGen, LiveKit, Retell, Sanas, and OpenArt; commercial offers include a guarantee to cut voice-AI costs by 50% (or 1 year free) and a one-month free promo for its first birthday.
Source evidence

OPEN SOURCE KEEPS WINNING

Fish Audio just dropped S2.1 Pro, and it's built specifically for multi-agent voice infrastructure.

Look at these specs:

→ 2x faster than Cartesia
→ 1/6th the cost of ElevenLabs
→ 83+ languages
→ word level control over emotion, pacing and delivery
→ on prem with zero data retention

If you build voice agents, you have to check it out

Fish Audio (@FishAudio)

Today we’ve raised $52M Seed and we are announcing the public launch of S2.1 Pro.

>It can clone a voice from 5 seconds of audio
>2x faster than Cartesia & 1/6th the cost of Eleven Labs
>most expressive model with word level control over emotion, intonation, pacing etc

We support frontier AI companies including HeyGen, LiveKit, Retell, Sanas, and OpenArt all run our model in production.

If you're a business and we can't cut your voice AI costs by 50%, we'll give you 1 year of Fish Audio for free.
Book a demo: s.fish.audio/tmapke

To celebrate our first birthday, we'll give you 1 month of S2.1 Pro for free. Like, retweet, and comment “Fish” to get it.

Video

— https://nitter.net/FishAudio/status/2082152596739862853#m