Cartesia is listed under AI Voice & Speech, in the Content & Media Generation category on Flocci AI Tools. Ultra-low-latency real-time voice (Sonic). It is freemium — a usable free tier with paid plans above it, and it lives at cartesia.ai.
Cartesia is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
Cartesia does 4 things the catalog singles out: Ultra-low-latency real-time voice (sonic); ideal for voice agents and calls; instant voice cloning; free tier for developers.
Chatterbox (Resemble AI) is the closest free alternative: it sits in the same AI Voice & Speech sub-category and is free. Kokoro TTS, ElevenLabs and Fish Audio also start free. The full list is on the alternatives page.
See the full list →