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AI Voice & Speech Comparison

Cartesia vs. Speechify

At a glance

At a glance

Cartesia

Best for

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

  • Small and mid-sized
  • Enterprise

Speechify

Best for

Best for turning documents, articles and audiobooks into natural-sounding audio.

  • Freelancers
  • Small and mid-sized

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

Full Comparison

Criterion Cartesia Speechify
Starting price Free tier; Pro from $5 / month Usage-based credits and agent minutes. Pro adds a commercial-use license and instant voice cloning. Free; paid tiers above The free tier has no commercial rights.
Free trial Free tier with 20,000 credits per month Free tier, without commercial rights
Commercial use Paid Paid tiers
Output Low-latency real-time speech, instant clone from around three seconds Natural text-to-speech for reading and listening, plus Speechify Studio for content
API Yes Yes, a text-to-speech API and a voice agents API on the developer platform
Voice cloning Yes, instant cloning from around three seconds, plus a Pro clone trained on 30 minutes or more of audio Yes, voice cloning in Speechify Studio, and zero-shot cloning on the developer platform that turns a short reference clip into a reusable voice ID
Real-time use Yes, real-time text-to-speech (Sonic), built for live voice agents Yes, the developer models are streaming-native with a claimed time to first byte under 300ms, and a separate voice agents API adds tools, memory and telephony
Languages Yes, Sonic 3.6 covers 44 languages natively, chosen per request with a language parameter and regional locale variants 1,000+ voices in 60+ languages in the reader; the developer models cover six validated locales, namely US English, German, Mexican Spanish, French, Italian and Brazilian Portuguese
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, dubbing in Speechify Studio
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 Playback up to 4.5x with synchronized highlighting, plus captions in Studio and SSML emotion control on the developer models across neutral, calm, cheerful, energetic and sad
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 Cloning is consent-first: a voice is built from a consented reference clip, and the company publishes its policy on keeping cloned voices out of election misinformation
Deployment Cloud (SaaS), Browser-based Cloud (SaaS), Browser-based
Support Not stated Email helpdesk
Onboarding Documentation and knowledge base Documentation and knowledge base
Company size Small and mid-sized, Enterprise Freelancers, Small and mid-sized
Integrations Not stated Google Docs, Gmail, Outlook, Slack

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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 Speechify Free; paid tiers above
  • Free trial Cartesia Free tier with 20,000 credits per month Speechify Free tier, without commercial rights
  • Company size Cartesia Small and mid-sized, Enterprise Speechify Freelancers, Small and mid-sized
  • Commercial use Cartesia Paid Speechify Paid tiers
  • Output Cartesia Low-latency real-time speech, instant clone from around three seconds Speechify Natural text-to-speech for reading and listening, plus Speechify Studio for content

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

Speechify

Strengths

  • Best for turning reading material into audio
  • Accessibility focus
  • Popular with creators

Limitations

  • Free tiers lack commercial rights
  • More consumer reader than production studio

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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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.

Speechify

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

Speechify https://speechify.com · 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.