Cartesia review

Best for

Developers building real-time voice agents and phone bots

Price

Freemium · from $5/month
Free: 20,000 credits a month

Platforms

Web, API

Made by

Cartesia AI, San Francisco, USA · since 2023

What it is

Cartesia builds the Sonic text-to-speech models, designed for real-time voice agents where speed matters most. Developers use its API, while anyone can generate and clone voices in its web playground; it also offers the Ink speech-to-text model and a managed voice-agent platform.

What the AI does

• Sonic text-to-speech with very low latency
• Instant and professional voice cloning
• Ink streaming speech-to-text
• Managed voice-agent platform
• On-device and on-premise deployment

Pros and cons

How it scores

Near the top for voice quality and speed at a low price, but it's an API-first tool rather than a studio.

Feature checklist · 4 of 9

• ✓Self-serve voice cloning from your own sample (yes)
• –Library of 500+ voices (no)
• ✓Speech in 30+ languages (yes)
• –Emotion or speaking-style control (no)
• –Pronunciation, pacing or pitch controls (no)
• ✓Low-latency real-time speech for voice agents (yes)
• –AI dubbing or translation of video (no)
• –Narration editor for video or slides (no)
• ✓API for developers (yes)

How we score apps →

Alternatives

See all Cartesia alternatives, ranked →

• ElevenLabs 8.7/10Creators and developers who want the most natural-sounding voices and the widest toolset
• Speechify Studio 8.0/10Creators who want strong voices plus dubbing and video editing in one cheap suite
• Fish Audio 7.9/10Budget-conscious creators who want strong voices and cloning without ElevenLabs prices
• Murf AI 7.7/10Marketing, training and e-learning teams producing narrated slides and videos

ElevenLabs vs CartesiaSpeechify Studio vs CartesiaFish Audio vs Cartesia

Sources

• Cartesia
• Cartesia pricing
• Artificial Analysis Speech Arena leaderboard
• The 8 best AI voice generators in 2026 (Dupple)
• Cartesia quick facts (Contrary Research)