Fish Audio Voice Cloning: Full Review
Fish Audio went from "the scrappy open-source alternative" to the model that beats ElevenLabs on quality benchmarks in about six months. The November 2025 S1 release took the #1 spot on TTS-Arena. The March 9, 2026 S2 release widened the gap and shipped the model weights, training code, and inference engine under Apache 2.0.
How Voice Cloning Works on Fish Audio
Upload 15 seconds of clean audio. Fish Audio's S2 model captures timbre, pacing, and speaking style from that single sample, then generates speech in that voice across 30+ languages — without any fine-tuning step. For higher fidelity, the Premium clone path accepts 1–3 minutes of reference audio.
There's no separate "voice cloning API" to integrate. The same TTS endpoint that generates from catalog voices generates from your cloned voice — same auth, same pricing, same parameters. That's a meaningful integration win for anyone building a product on top.
Quality: What the Benchmarks Actually Say
Fish Audio's own published blind A/B testing put S2 Pro ahead of ElevenLabs V3 at 60% vs 40%, and S1 ahead of V3 at 64% vs 36%. Independent benchmarks back this up:
- TTS-Arena blind listening: Fish Audio S1/S2 ranked #1 (October 2025 through April 2026)
- Audio Turing Test: S2 scored 0.515, beating Seed-TTS (0.417) by 24%
- Seed-TTS Eval: S2 hit the lowest Word Error Rate among all evaluated models, open or closed
- EmergentTTS-Eval: S2 won 81.88% of head-to-heads vs gpt-4o-mini-tts, with 91.61% win rate on paralinguistic content (laughter, sighs, breath)
Where ElevenLabs still wins: voice library breadth, the polished consumer UI, built-in video dubbing, and a text-to-sound-effects generator. Fish Audio doesn't ship those.
Pricing: The 6× Story
The pricing gap is the part most reviews miss. The API is the headline:
- Fish Audio API: ~$15 per 1 million UTF-8 bytes (≈ 180,000 English words, ≈ 12 hours of speech)
- ElevenLabs API: ~$165 per 1 million characters at comparable quality
That's not a 20% discount. It's roughly 6×. If you're spending $1,000/mo on ElevenLabs API, the equivalent volume on Fish Audio is closer to $170. For products that ship voice at scale, this changes what's financially viable to build.
The subscription tiers are simple:
- Free: 8,000 credits/month (~7 minutes of S1-quality audio), voice cloning included, non-commercial only
- Plus ($11/mo): 200 minutes, commercial rights, premium cloning, API access
- Pro ($75/mo or $900/yr): High-volume generation, batch workflows, higher concurrency
ElevenLabs starts at $5/mo but caps free voice cloning more aggressively and charges $22/mo for the equivalent commercial-use Creator tier. Fish Audio's $11 Plus tier covers most solo creators completely.
Inline Emotion Tags
Fish Audio's S2 release added word-level emotional control through inline tags. Drop [laugh], [whispers], [chuckle], [long pause], [excited], or [breathy] directly into your text and the model honors them at that exact spot. The full tag set covers 50+ emotions and special effects.
ElevenLabs offers SSML and emotional presets, but nothing matches the granularity of inline tags. For character work, audiobook narration, and conversational AI, this is the feature that makes Fish Audio feel "alive" instead of generated.
Who Should Use Fish Audio
Pick Fish Audio if you:
- Need top-tier TTS quality without ElevenLabs pricing
- Build a product on the API and care about per-character cost at scale
- Make multilingual content (clone an English voice, generate Spanish/Japanese/Arabic)
- Want self-hosting for privacy, data sovereignty, or unlimited usage
- Need word-level emotional control for character voices or audiobook narration
Stick with ElevenLabs if you:
- Specifically need built-in dubbing or text-to-SFX
- Value a larger curated voice library over benchmark wins
- Already have a workflow built around ElevenLabs' studio tools
Self-Hosting Note
S2 is open source under Apache 2.0. The full package — model weights, fine-tuning code, and the SGLang-based inference engine — runs on a consumer GPU. For teams with privacy requirements or high enough volume to justify the setup, self-hosting eliminates the API line item entirely. The model is on HuggingFace and the GitHub repo maintains active development.
Bottom Line
Fish Audio is the strongest ElevenLabs alternative in 2026. It wins on quality benchmarks, costs roughly 6× less on the API, and is the only major TTS that's both #1-ranked and open source. Start on the free tier to confirm it works for your use case, then move to Plus at $11/mo for commercial work.