Cartesia vs ElevenLabs Agents
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Cartesia if you want low-latency voice ai models and a platform for real-time voice agents (Assistant, freemium); choose ElevenLabs Agents if you want platform for building real-time voice and chat ai agents (Supervised agent, subscription).
| Cartesia | ElevenLabs Agents | |
|---|---|---|
| What it is | Low-latency voice AI models and a platform for real-time voice agents | Platform for building real-time voice and chat AI agents |
| Type | platform | platform |
| Autonomy | Assistant | Supervised agent |
| Pricing | freemium · Free (20K credits/mo); Pro $5/mo | subscription · Free tier; paid plans from ~$5/mo + usage |
| Best for | developers, enterprise | developers, mid-market, enterprise |
| Deployment | saas, api, self-hosted, on-prem | saas, api |
| Modalities | text, voice, api, code | voice, text, api |
| Models | proprietary | proprietary, model-agnostic, claude, gpt, gemini |
| Protocols | rest-api, function-calling | mcp, function-calling, rest-api |
| Integrations | LiveKit, Twilio, Pipecat, Vapi | Twilio, Genesys, Vonage, Telnyx, Plivo, HubSpot |
| Capabilities | 4 documented | 4 documented |
Cartesia
- +Genuinely differentiated state-space-model tech with best-in-class latency and on-device efficiency
- +Full stack (TTS, STT, cloning, and the Line agent platform) plus deep ecosystem integrations and self-hosted/VPC options
- +Strong technical credibility and capital, including NVIDIA backing
- -Younger and less battle-tested than ElevenLabs and Deepgram; the Line agent platform is barely a year old
- -Closed, proprietary models (no open weights for production Sonic/Ink), creating lock-in
ElevenLabs Agents
- +LLM-agnostic on top of best-in-class proprietary text-to-speech and its own speech-to-text
- +Strong first-class telephony story (Twilio, SIP, multiple carriers) with sub-second latency
- +Flexible build paths: no-code builder, SDKs, WebSocket API, function calling, and MCP
- -Layered, recently changed pricing (bundled minutes plus overage plus pass-through LLM cost) makes total cost hard to predict
- -Autonomy is bounded to configured tools, not autonomous out of the box
Which should you choose?
Cartesia is low-latency voice ai models and a platform for real-time voice agents, best for developers, enterprise. ElevenLabs Agents is platform for building real-time voice and chat ai agents, best for developers, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.