Compare voice AI.
See why teams choose Cartesia.

Side-by-side comparisons of Cartesia and other voice AI platforms, on voice quality, latency, and deployment.

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Cartesia vs the rest

Where Sonic beats other voice AI platforms, page by page.

Cartesia vs Amazon Polly

Listeners rate Sonic 3.6 above every Polly engine, and it generates speech faster than Polly Generative.

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Cartesia vs Bland

Listeners rate Sonic 3.6 above Bland TTS, and it generates speech twice as fast.

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Cartesia vs Deepgram

Sonic 3.5 holds a tighter latency spread than both Deepgram Aura-2 and Flux in independent testing.

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Cartesia vs ElevenLabs

Sonic 3.6 outscores every ElevenLabs model on quality benchmarks, and Cartesia runs 4x faster on P90 latency.

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Cartesia vs Fish Audio

Sonic 3.6 tops Fish Audio S2.1 Pro on independent quality benchmarks, and Cartesia runs 2x faster on P90 latency.

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Cartesia vs Gemini TTS

Listeners rate Sonic 3.6 above every Gemini TTS model, and Cartesia generates speech about five times faster.

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Cartesia vs Grok TTS

Sonic 3.6 ranks first for quality on Artificial Analysis, and Cartesia is faster at every quartile.

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Cartesia vs Hume AI

Listeners rate Sonic 3.6 above both Octave models, and Cartesia generates speech faster for less per character.

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Cartesia vs Inworld AI

Sonic 3.6 ranks first for voice quality on Artificial Analysis, ahead of every Inworld Realtime TTS model.

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Cartesia vs Microsoft Azure Text-to-Speech

Listeners rate Sonic 3.6 above Azure HD and Neural voices, and Cartesia generates speech faster.

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Cartesia vs Murf AI

Listeners rate Sonic 3.6 above Falcon 2 and Speech Gen 2, and it makes fewer word errors than Falcon 2.

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Cartesia vs OpenAI

Listeners rate Sonic 3.6 above OpenAI GPT-Realtime-2 on voice quality in independent blind testing.

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Cartesia vs PlayHT

PlayHT shut down at the end of 2025. Move your voice app to Sonic 3.6, rated first by listeners, in 44 languages.

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Cartesia vs Resemble AI

Listeners rate Sonic 3.6 above Chatterbox and Chatterbox HD, in 44 languages against 23.

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Cartesia vs Rime

Listeners rate Sonic 3.6 above Coda and Mist, with fewer word errors and faster latency than Coda.

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Cartesia vs Smallest AI

Listeners rate Sonic 3.6 above Lightning v3.1 Pro, and it answers faster at P95 with fewer word errors.

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Cartesia vs Soniox

Listeners rate Sonic 3.6 above Soniox TTS Real-Time v2, and it generates speech six times as fast.

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Cartesia vs Speechify

Listeners rate Sonic 3.6 above Simba 3.2 and 3.0, with fewer word errors and steadier latency.

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Cartesia vs Typecast

Listeners rate Sonic 3.6 above SSFM-v30 and SSFM-v21, and Cartesia costs about half as much per character.

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ElevenLabs vs the rest

Explore how ElevenLabs compares with other speech platforms, voiceover tools, and APIs.

ElevenLabs vs Amazon Polly

Compare self-service voice creation with AWS speech engines for your chosen language and integration.

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ElevenLabs vs Deepgram

Evaluate ElevenLabs models against Flux TTS and Aura-2, separating speech generation from transcription products.

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ElevenLabs vs Descript

Choose between speech APIs and transcript-based editing, including Descript workflows that use ElevenLabs voices.

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ElevenLabs vs Google TTS

Distinguish Google Cloud voices from Gemini speech generation before comparing models, costs, and integrations.

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ElevenLabs vs Hume AI

Compare expressive speech models with Hume Octave, and distinguish TTS from its conversational EVI product.

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ElevenLabs vs Microsoft Text-to-Speech

Explore voice creation, Azure voice families, and deployment options for a specific speech workflow.

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ElevenLabs vs Murf AI

Compare creative voiceover tools and speech APIs, including Murf Studio, Falcon 2, and Gen2.

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ElevenLabs vs Narakeet

Evaluate narrated presentations and video creation alongside speech models designed for application integrations.

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ElevenLabs vs OpenAI TTS

Compare text-to-speech endpoints, custom-voice access, and billing separately from OpenAI Realtime conversations.

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ElevenLabs vs Resemble AI

Weigh hosted expressive speech models against Resemble Ultra and running Chatterbox on your own infrastructure.

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ElevenLabs vs Smallest AI

Compare ElevenLabs speech models with Lightning TTS, keeping complete Atoms agent workflows separate.

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ElevenLabs vs Speechify

Identify the right workflow across document reading, Studio voiceovers, and developer speech APIs.

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ElevenLabs vs Typecast

Compare creative tools and streaming APIs, including Typecast Smart Emotion and workload-specific ElevenLabs models.

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Why teams choose Cartesia

Voice quality

Sonic 3.6 ranks first on the Artificial Analysis Provider Voice Arena, a blind listening test.

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Response time

Sonic streams its first audio in under 90ms, fast enough for a live phone call.

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Voice control

44 languages from one model, and an instant voice clone from 10 seconds of audio.

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Start free

The free plan includes 20,000 credits, and paid plans start at $5 a month.

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Learn how to build with speech

Go from comparing providers to testing a working application. Explore browser speech and a Python API example.

JavaScript text to speech with SpeechSynthesis

Build a browser text-to-speech demo with JavaScript: load voices, speak text, and stop playback. Learn when to use a hosted TTS API instead.

Read the guide →

Python text to speech: save audio as a WAV file

Turn text into a WAV file with Python and the Cartesia SDK. Set up an API key, choose a voice, and fix common audio and authentication errors.

Read the guide →

Voice AI comparison FAQs

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