# AssemblyAI vs Fish Audio

AssemblyAI records 453,591 monthly visits with -6.9% month-over-month growth and Freemium, Contact for Pricing pricing. Fish Audio records 8,557,159 monthly visits with +1.6% growth and Freemium pricing.

| Metric | [AssemblyAI](https://openaitools.app/tool/assemblyai) | [Fish Audio](https://openaitools.app/tool/fish-speech) |
| :--- | :--- | :--- |
| Website URL | https://www.assemblyai.com | https://fish.audio |
| Categories | AI Speech-to-Text, AI Transcription, AI Speech Recognition, AI Developer Tools | AI Voice Generator, AI Text-to-Speech, AI Celebrity Voice Generator, AI Models |
| Pricing Model | Freemium, Contact for Pricing | Freemium |
| Monthly Visits | 453,591 | 8,557,159 |
| MoM Growth Rate | -6.9% | +1.6% |
| Primary Market | Brazil | United States |
| Direct Visits | 281,472 | 3,703,977 |
| Review Score | 4.6 | 4.4 |
| Saved Count | 9 | 11 |
| Supported Platforms | Website | Website |

## AssemblyAI

AssemblyAI builds speech AI models and the infrastructure to run them, aimed at developers and product teams adding voice to an application. Its core offering is speech-to-text: an asynchronous API for pre-recorded audio, a realtime API for streaming and voice agents, and a synchronous API for short clips and dictation. The company's flagship accuracy model is marketed as top of independent benchmarks, with strong speaker diarization and native code-switching across dozens of languages.

On top of transcription, AssemblyAI offers a Speech Understanding API that layers tasks such as summarization, sentiment, topic detection, PII redaction, content moderation and guardrails onto transcripts. It has also released its first text-to-speech model, AssemblyAI-TTS-1, built for voice agents on live calls, plus an LLM Gateway for routing model calls and a Dictation API. Models can run on AssemblyAI's managed inference cloud, or self-hosted in a customer's own VPC or on-premises environment.

Pricing is pay-as-you-go after a free trial: for example, pre-recorded transcription is billed per audio hour, with optional add-ons such as speaker diarization, keyterms prompting and medical or veterinary modes priced separately. Enterprise plans offer custom rate limits, higher concurrency and compliance features including SOC 2 Type 2, HIPAA and GDPR.

**Pricing & Plans:** Free trial to start, then pay-as-you-go per audio hour and per add-on feature — for example around $0.15/hr for the Universal-2 model and around $0.21/hr for the more accurate Universal-3.5 Pro model, with extras like diarization billed individually. Enterprise and custom-rate-limit plans are available via sales.

- **Async, realtime and sync speech-to-text:** Choose pre-recorded transcription for files, a realtime API for live streams and voice agents, or a synchronous endpoint for short clips and dictation.
- **Audio intelligence and Speech Understanding:** Layer summarization, sentiment, topic detection, PII redaction, content moderation and guardrails onto transcripts without building your own models.
- **Text-to-speech for voice agents:** AssemblyAI-TTS-1 is trained on real phone calls for natural, low-latency speech, targeted at IVR and voice-agent use cases.
- **High accuracy with diarization:** Flagship models emphasise exact transcription, speaker labels and native code-switching across many languages, supported by published benchmarks.
- **Flexible deployment:** Run models on AssemblyAI's managed cloud with unlimited concurrency, or self-host in your own VPC or on-prem for full data control.

**Strengths:** One API family covering transcription, understanding and text-to-speech; Transparent per-hour pay-as-you-go pricing with a free trial; Self-hosting option for teams with strict data-residency requirements; Strong accuracy and diarization performance backed by published benchmarks

**Limitations:** Costs scale with volume and add-ons can raise the effective per-hour rate; Some advanced features are model-specific and not available on every model; Heavier product surface than a simple transcription API may be overkill for basic needs

[Profile (Markdown)](https://openaitools.app/tool/assemblyai.md)

## Fish Audio

Fish Audio, originally known as Fish Speech, is a voice-AI platform for turning text into natural speech. It combines text-to-speech, voice cloning and speech-to-text with emotional control, so you can tag a line as [whispering], [excited] or [sobbing] and get delivery that matches the script rather than flat narration. The voice library is enormous, with community-uploaded voices numbering in the millions across a wide range of languages.

Cloning is fast and forgiving: a short sample is enough to build a usable voice model, and it can then speak in many languages while keeping the original timbre. Fish Audio publishes powerful APIs for real-time streaming, cloning and transcription, and positions itself for enterprise work such as conversational agents, dubbing and audiobook production.

The company also keeps an open-source arm, releasing the Fish Speech model line for self-hosting, while the hosted platform adds a browser studio, avatar and image/video model integrations, and paid tiers for higher volume. Free starting tiers make it easy to evaluate before committing.

**Pricing & Plans:** Freemium: free sign-up with monthly generations, plus paid subscriptions for higher volume, commercial use and API access; enterprise pricing on request.

- **Expressive Text to Speech:** Type or paste a script and generate natural narration, with inline emotion and delivery tags such as [whispering], [angry] or [laughing].
- **Instant Voice Cloning:** Create a usable voice clone from a short audio sample and reuse it across scripts and languages.
- **Huge Voice Library:** Browse and use a large catalog of community voices covering many languages and character styles.
- **Speech to Text:** Transcribe audio with multilingual support and emotion or speaker cues for downstream editing.
- **Real-time Voice APIs:** Low-latency streaming endpoints let developers build conversational agents, dubbing pipelines and audio apps.

**Strengths:** Natural, emotionally controllable output that handles nuance well; Voice cloning works from a very short sample; Very large shared voice library plus open-source model lineage; Robust APIs for real-time streaming and developer integration

**Limitations:** Free tier is limited and top-quality usage pushes you toward paid plans; Voice cloning raises consent and impersonation risks that teams must manage; Some features and model names change quickly, so docs can lag the product

[Profile (Markdown)](https://openaitools.app/tool/fish-speech.md)

## Frequently Asked Questions

### How do AssemblyAI and Fish Audio compare in monthly traffic?

AssemblyAI has 453,591 monthly visits, while Fish Audio has 8,557,159. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

AssemblyAI has a month-over-month growth rate of -6.9%; Fish Audio has +1.6%.

### How does pricing compare?

AssemblyAI: Freemium, Contact for Pricing. Free trial to start, then pay-as-you-go per audio hour and per add-on feature — for example around $0.15/hr for the Universal-2 model and around $0.21/hr for the more accurate Universal-3.5 Pro model, with extras like diarization billed individually. Enterprise and custom-rate-limit plans are available via sales. Fish Audio: Freemium. Freemium: free sign-up with monthly generations, plus paid subscriptions for higher volume, commercial use and API access; enterprise pricing on request.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [OpenAI Platform](https://openaitools.app/tool/openai) | 234,678,639 | -9.6% | Paid | Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents. | [.md](https://openaitools.app/tool/openai.md) |
| 2 | [ElevenLabs](https://openaitools.app/tool/elevenlabs-io) | 42,396,771 | +26.1% | Freemium, Paid, Contact for Pricing | Industry-leading voice cloning and text-to-speech quality, but lacks Fish Audio's open-source model flexibility and self-hosting options. | [.md](https://openaitools.app/tool/elevenlabs-io.md) |
| 3 | [HeyGen](https://openaitools.app/tool/heygen) | 7,000,070 | +9.4% | Freemium | Turn scripts into studio-quality AI avatar videos in minutes | [.md](https://openaitools.app/tool/heygen.md) |
| 4 | [Speechify](https://openaitools.app/tool/speechify) | 5,457,475 | +0.5% | Freemium | Text to speech and voice AI across every device | [.md](https://openaitools.app/tool/speechify.md) |
| 5 | [Voicemod](https://openaitools.app/tool/voicemod) | 3,836,221 | -2.7% | Freemium | Real-time AI voice changer and soundboard for gaming and streaming | [.md](https://openaitools.app/tool/voicemod.md) |
| 6 | [Cartesia](https://openaitools.app/tool/cartesia-ai) | 1,782,707 | +49.7% | Contact for Pricing | Delivers ultra-low latency real-time streaming speech generation via API, though less focused on consumer dubbing workflows. | [.md](https://openaitools.app/tool/cartesia-ai.md) |
| 7 | [TTSMaker](https://openaitools.app/tool/ttsmaker) | 1,158,846 | +6.8% | Freemium | Free online text-to-speech with hundreds of AI voices across more than 100 languages | [.md](https://openaitools.app/tool/ttsmaker.md) |
| 8 | [Deepgram Voice AI](https://openaitools.app/tool/deepgram-voice-ai) | 863,852 | +31.8% | Free Trial | Offers exceptionally fast real-time transcription speeds and competitive enterprise pricing, but has slightly fewer audio intelligence summarization features. | [.md](https://openaitools.app/tool/deepgram-voice-ai.md) |
| 9 | [Vapi](https://openaitools.app/tool/vapi) | 662,301 | -11.4% | Freemium | Specializes in orchestrating complete conversational voice agent pipelines rather than raw standalone transcription APIs. | [.md](https://openaitools.app/tool/vapi.md) |
| 10 | [Soniox](https://openaitools.app/tool/soniox) | 335,647 | +2.2% | Paid | Delivers high-accuracy speech-to-text and translation across numerous languages, but with a more streamlined feature set. | [.md](https://openaitools.app/tool/soniox.md) |

---
Source: https://openaitools.app/compare/assemblyai-vs-fish-speech

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)