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AI Voice & Speech Comparison

Cartesia vs. Fish Audio

At a glance

At a glance

Cartesia

Best for

Best for developers building low-latency, real-time voice agents.

  • Small and mid-sized
  • Enterprise

Fish Audio

Best for

Best for developers and creators who want expressive text-to-speech and quick voice cloning, including open-source models.

  • Freelancers
  • Small and mid-sized

Cataleo does not name a winner. Both statements come from the vendors themselves.

Full Comparison

Criterion Cartesia Fish Audio
Starting price lower value Free tier; Pro from $5 / month Usage-based credits and agent minutes. Pro adds a commercial-use license and instant voice cloning. Free tier; Plus from $15 / month Credit-based. Plus adds 250,000 credits per month, commercial use and API access; 33% off with annual billing.
Free trial Free tier with 20,000 credits per month Free tier with 8,000 credits per month (about 7 minutes)
Commercial use Paid Not stated
Output Low-latency real-time speech, instant clone from around three seconds Text-to-speech, speech-to-text and voice cloning (S2.1 Pro model)
API Yes Yes, REST API and SDKs
Voice cloning Yes, instant cloning from around three seconds, plus a Pro clone trained on 30 minutes or more of audio Yes, from about 15 seconds of audio
Real-time use Yes, real-time text-to-speech (Sonic), built for live voice agents Yes, real-time with low latency
Languages Yes, Sonic 3.6 covers 44 languages natively, chosen per request with a language parameter and regional locale variants 30+ languages
Speech-to-speech and dubbing Yes, a voice changer, plus localization that converts existing audio across the 44 supported languages while holding the speaker's emotion and identity Yes, a Voice Changer transforms existing audio into a different voice
Editing and controls Speed 0.6x to 1.5x, volume 0.5x to 2x, an emotion setting (neutral, calm, angry, content, sad) or model-interpreted emotion, custom pronunciation dictionaries, accent selection for multilingual voices and text normalization Emotion tags and effects such as angry, sad, excited, whispering, laughing and pauses
Consent and trust The terms of service forbid publishing audio of another person's voice without that person's express permission, and name deceased people and political candidates explicitly Professional clones require a live voiceprint check: the speaker reads a randomised passage that is matched against the training audio. Instant clones are unverified. The terms forbid using another person's voice without permission, with a voice ownership dispute process
Deployment Cloud (SaaS), Browser-based Cloud (SaaS), Browser-based
Support Not stated Email helpdesk, Community forum
Onboarding Documentation and knowledge base Documentation and knowledge base
Company size Small and mid-sized, Enterprise Freelancers, Small and mid-sized

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Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.

The short version

Key Differences

  • Starting price Cartesia Free tier; Pro from $5 / month Fish Audio Free tier; Plus from $15 / month
  • Free trial Cartesia Free tier with 20,000 credits per month Fish Audio Free tier with 8,000 credits per month (about 7 minutes)
  • Company size Cartesia Small and mid-sized, Enterprise Fish Audio Freelancers, Small and mid-sized
  • Output Cartesia Low-latency real-time speech, instant clone from around three seconds Fish Audio Text-to-speech, speech-to-text and voice cloning (S2.1 Pro model)
  • API Cartesia Yes Fish Audio Yes, REST API and SDKs

Every line is one datapoint from the table above, picked automatically. Nothing here is written text.

The trade-offs

Strengths and Limitations

Cartesia

Strengths

  • Lowest-latency real-time voice for agents
  • Instant three-second cloning
  • Cost-effective developer API

Limitations

  • Less expressive on long-form and audiobook content
  • Newer and developer-oriented

Fish Audio

Strengths

  • Fast voice cloning and expressive emotion control
  • Open-source models (Fish Speech and Fish Audio S2)
  • Large community voice library and a developer API

Limitations

  • API access and commercial use require a paid plan
  • Cloned and community voices raise consent questions

Plans

Pricing

Cartesia

  • Free $0 20,000 credits per month plus $1 of prepaid agent usage. Text-to-speech and speech-to-text.
  • Pro $5 / month 100,000 credits, a commercial-use license and instant voice cloning.
  • Startup $49 / month 1.25 million credits, professional voice cloning and organizations.
  • Scale $299 / month 8 million credits, priority support and high concurrency limits.
  • Enterprise Not stated Custom credits and agent usage, custom concurrency limits, DPAs/BAAs and SSO.
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Fish Audio

  • Free $0 8,000 credits per month (about 7 minutes) and 3 public voice slots. No API access.
  • Plus $15 / month 250,000 credits (about 200 minutes), commercial use, API access and one professional voice slot. 33% off billed annually.
  • Pro $100 / month 2,000,000 credits, 3 team seats and five professional voice slots. 33% off billed annually.
  • Max $999 / month 25,000,000 credits, 10 team seats and 15 professional voice slots.
  • Enterprise Not stated Custom terms with zero data retention, on-premise deployment and SOC 2 compliance.
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What users say

Review Scores · opens after launch

Cartesia

Ease of use
Not rated yet
User interface
Not rated yet
Onboarding
Not rated yet
Support and service
Not rated yet
Value for money
Not rated yet
Features
Not rated yet

No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.

Fish Audio

Ease of use
Not rated yet
User interface
Not rated yet
Onboarding
Not rated yet
Support and service
Not rated yet
Value for money
Not rated yet
Features
Not rated yet

No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.

Where this comes from

Where this comes from

Cartesia https://cartesia.ai · no check date recorded yet

Fish Audio https://fish.audio · no check date recorded yet

This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.