Cartesia

What we know about Cartesia

Cartesia is a text-to-speech apis platform: lowest-latency TTS for real-time voice agents. This profile tracks what we have verified about Cartesia, each fact linked to a primary source and dated.

On pricing, Cartesia starts at $5 per month for its entry tier. That is the sticker rate: real production cost usually runs higher once you add a language model, a voice provider, and telephony minutes. Every Cartesia comparison on the site works from that all-in figure rather than the headline number, because the headline number is rarely what the invoice says.

On capabilities, Cartesia covers streaming audio output, realtime websocket api, instant voice cloning, professional voice cloning, word-level timestamps, and pronunciation dictionaries, and does not offer commercial use on free tier. Each of those is verified against Cartesia's own docs or dashboard, not marketing copy.

For compliance, with Cartesia: SOC 2 Type II is in place. If you are in a regulated space, confirm the current posture with Cartesia before you commit, since these change plan by plan.

In total we track 21 verified facts for Cartesia today, and add coverage as the ingestion pass revisits it. Where a number is a vendor claim rather than our own measurement, it is labeled as such on the Cartesia fact sheet below, and each row links the primary source it came from so you can check our work.

Whether Cartesia is the right call depends on your use case more than any single spec, which is why the head-to-head verdicts below score it per scenario rather than crowning one overall winner. Use the fact sheet for the raw numbers, and the matchups for how Cartesia actually fares against the platforms buyers most often weigh it against.