Choose AssemblyAI if you need
- Integration with Zapier, Zoom or Vapi. We haven't found them on Cartesia's website.
At a glance
- Both have a free plan.
- Cartesia's lowest paid plan is Pro at $5 per month, as of October 20, 2026.
- Both are available on API.
- Both work with Twilio, LiveKit and Pipecat.
- Both list SOC 2 and SSO.
- Both have a public API.
- Cartesia can be self-hosted. We haven't confirmed that for AssemblyAI.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Cartesia if you need
No checked fact sets Cartesia apart from AssemblyAI yet.
AssemblyAI
Nobody has reviewed AssemblyAI yet. Its rating shows once it has 3 reviews.
Review AssemblyAI
Cartesia
Nobody has reviewed Cartesia yet. Its rating shows once it has 3 reviews.
Review CartesiaThe facts
- What it does
- AssemblyAIVoice AI infrastructure for builders, with pre-recorded and real-time speech-to-text and voice agent APIs
- CartesiaVoice agents that answer and make calls, and the speech models behind them, in one API
- Free plan
- AssemblyAIYes
- CartesiaYes
- Pricing
- AssemblyAINot confirmed
- CartesiaMonthly plans with usage credits
- Paid plans from
What they share
From the platforms and integrations each website lists.
Platforms
Both
- API
Only AssemblyAINothing else listed
Only CartesiaNothing else listed
Integrations
Both
- Twilio
- LiveKit
- Pipecat
Only AssemblyAI
- Zapier
- Zoom
- Vapi
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between AssemblyAI and Cartesia yet.
Used either of them?
Your review makes this comparison better for the next person. Review AssemblyAI or review Cartesia.