Features, pricing, and fit
Compare ElevenLabs Agents and Line on voice capabilities, pricing, and fit.
Compare ElevenLabs Agents and Cartesia Line for AI phone agents, then match channels, workflows, and deployment models to your call flow.
Voice-first agent platform with visual workflows, custom-model choices, phone/web/mobile deployment, and built-in testing and evaluation.
Teams that need a managed voice library and agent workflows spanning telephony, web, and mobile.
Explore its buying criteria: AI phone agents.
Managed Line runtime for voice agents with no-code Agent Builder, SDK-defined reasoning, Cartesia Ink STT, Sonic TTS, deployment, and observability.
Teams that want managed audio plumbing while retaining code-level control over reasoning, tools, and external APIs.
Explore its buying criteria: AI phone agents · Voice AI platforms.
ElevenLabs Agents checked 2026-10-09; Cartesia Line checked 2026-09-04.
Use the table below to compare each provider’s documented scope.
Before you decide
ElevenLabs Agents: Monthly plans include call minutes and concurrency. LLM usage is billed separately; external telephony providers bill their own carrier charges. Enterprise terms are custom. Cartesia Line: Not publicly documented Ask both vendors to quote the same expected workload, required channels, and implementation scope. Include required subscriptions and usage charges before comparing the total; the listed starting prices alone may cover different work.
The recorded knowledge and data sources for ElevenLabs Agents include Knowledge-base documents from files, URLs and text; Retrieval-augmented generation (RAG). For Cartesia Line, they include Not publicly documented. Ask each provider to demonstrate access for the exact systems you use, with permissions, freshness, and failure behavior. A source missing from this directory is not proof that a provider cannot support it.
Use the same representative calls, approved instructions, and escalation rules in both pilots. How does it handle interruption and uncertainty? Which actions can it complete, and which require approval? What context reaches a human during transfer? Record conversation quality, completed tasks, human handoffs, and total cost in the buyer worksheet. Check these specific cautions before launch: ElevenLabs Agents: Voice cloning requires authorization and governance. Budget for LLM usage, external carrier charges, overage and concurrency. Warm transfer messages require native Twilio; SIP REFER requires trunk support and has no warm message. Cartesia Line: Confirm product availability, carrier coverage, models, data handling, and generally available features.
Record your requirements and pilot results in the buyer worksheet →
Swipe or scroll the table to see every column.
| Criterion | ElevenLabs Agents | Line |
|---|---|---|
| Provider type | Voice agent platform and speech API | Voice agent platform and speech API |
| Best fit | Teams that need a managed voice library and agent workflows spanning telephony, web, and mobile. | Teams that want managed audio plumbing while retaining code-level control over reasoning, tools, and external APIs. |
| Key capabilities | voice library; custom voices; tools; knowledge bases; phone and web agents | realtime voices; agent configuration; telephony; tools; API |
| Team sizes | startup; mid-market; enterprise; developer | startup; mid-market; enterprise; developer |
| Call surfaces | phone / PSTN; SIP; web voice; mobile; API / SDK | phone / PSTN; API / SDK |
| Voice stack | Cascaded STT-LLM-TTS using ElevenLabs voices | Cascaded STT-LLM-TTS using Cartesia TTS |
| Telephony | Native Twilio integration; SIP trunks for inbound and outbound calls | Not publicly documented |
| Call controls | Configurable turn-taking, interruptions and timeouts; Human transfer with channel-specific conference, blind and SIP REFER modes | Not publicly documented |
| Languages | Multilingual voice configuration; verify speech recognition, selected model and voice coverage for each required language. | Not publicly documented |
| Integrations | Client, webhook, code and MCP tools | Not publicly documented |
| Knowledge and data | Knowledge-base documents from files, URLs and text; Retrieval-augmented generation (RAG) | Not publicly documented |
| Pricing model | Monthly plans include call minutes and concurrency. LLM usage is billed separately; external telephony providers bill their own carrier charges. Enterprise terms are custom. | Not publicly documented |
| Pricing signal | Regular monthly: Free 15 min; Starter $6/75, Creator $22/275, Pro $99/1,238, Scale $299/3,738, Business $990/12,375 min. Extra minutes $0.08; concurrency burst $0.16. LLM and external carrier charges are separate. | Approximately $0.06/min plus about $0.014/min managed telephony; verify current calculator. |
| Free plan or trial | Free plan includes 15 minutes. | Not publicly documented |
| What stands out | ElevenAgents combines ElevenLabs voice selection and cloning with visual workflow building, custom LLM options, conversation controls, and evaluation tooling. | Line separates reasoning from audio operations: it offers a no-code builder or SDK for custom logic while managing deployment/observability and pairing Ink with Sonic. |
| Considerations | Voice cloning requires authorization and governance. Budget for LLM usage, external carrier charges, overage and concurrency. Warm transfer messages require native Twilio; SIP REFER requires trunk support and has no warm message. | Confirm product availability, carrier coverage, models, data handling, and generally available features. |
Teams that need a managed voice library and agent workflows spanning telephony, web, and mobile.
ElevenAgents combines ElevenLabs voice selection and cloning with visual workflow building, custom LLM options, conversation controls, and evaluation tooling.
Teams that want managed audio plumbing while retaining code-level control over reasoning, tools, and external APIs.
Line separates reasoning from audio operations: it offers a no-code builder or SDK for custom logic while managing deployment/observability and pairing Ink with Sonic.
Verify current pricing, limits, security, and required integrations directly with each provider before purchasing.
Test recognition, speech quality, interruptions, language switching, tool use, and human transfer with your own calls in the required language. Availability can vary by model, plan, and phone route.
DocsBot documents multilingual voice workflows and Japanese support. Verify the exact voice, phone path, and transfer behavior in your pilot. Review DocsBot language information ↗
Other providers’ language claims reflect cited vendor material; confirm Japanese and other required languages directly with each provider.
Listing does not imply endorsement or a performance guarantee. This directory is published by DocsBot. Editorial policy
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