Cartesia vs Vapi: Which Is Better for Your Team in 2026?
Cartesia and Vapi are both used for ai voice agents. Below we compare them on pricing, AI capabilities, compliance, and the use cases each one fits best — all from verified vendor data.
Choose Cartesia if…
- Voice agent platform builders (Vapi, Retell, LiveKit) embedding best-in-class TTS/STT as a component
- Enterprise teams in healthcare and finance who need HIPAA + PCI compliance with sub-100ms latency
- Teams building multilingual agents across 42 languages including Indian-language markets
- Developers who want to own the full stack via Line and avoid LLM and telephony lock-in
Choose Vapi if…
- Engineering teams that want total control over LLM, voice, and telephony stack
- Startups building voice AI products on top of Vapi's infrastructure layer
- Regulated-industry deployments (healthcare, finserv) needing HIPAA + SOC 2 + BAA
- High-customization use cases: custom LLM fine-tunes, proprietary TTS voices
Cartesia vs Vapi: feature comparison
| Feature | Cartesia | Vapi |
|---|---|---|
| At a glance | ||
| Category | AI voice agent platform | AI voice agent platform |
| Best fit | Smb, Mid market, Enterprise | Smb, Mid market, Enterprise |
| Deployment | Cloud, Private cloud, On premise | Cloud, Private cloud |
| Channels | Voice, Web chat | Voice, SMS |
| Pricing & ratings | ||
| Starting price | Contact sales | From $0.05/min |
| Free trial | No | No |
| User rating | — | — |
| AI capabilities | ||
| Autonomous voice agent | Yes | Yes |
| Real-time agent assist | No | No |
| Conversation intelligence | No | No |
| Automated QA | No | No |
| Intelligent routing | No | Yes |
| Compliance | ||
| SOC 2 Type II | Yes | Yes |
| HIPAA | Yes | Yes |
| PCI DSS | Yes | Yes |
| GDPR | Yes | Yes |
Cartesia vs Vapi: frequently asked questions
- What is the difference between Cartesia and Vapi?
- Fastest TTS/STT infrastructure in the category — Sonic-3 at 90ms, Ink at 66ms TTCT. Line adds a full agent layer on top. Infrastructure-first but increasingly a finished platform. By contrast, Maximum configurability for engineers: BYO everything, 9+ LLM providers, 10+ TTS providers. The tradeoff is real — non-engineers will hit a wall fast.