Features, pricing, and fit
Compare Line and LiveKit Agents on voice capabilities, pricing, and fit.
Compare Cartesia Line and LiveKit Agents for AI phone agents, Voice AI platforms, then match channels, workflows, and deployment models to your call flow.
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.
Realtime agent framework and Cloud platform supporting STT-LLM-TTS pipelines, native realtime models, half-cascade paths, WebRTC, and telephony.
Engineering teams that want to choose pipeline architecture and pair agent infrastructure with their own application logic.
Explore its buying criteria: AI phone agents · Voice AI platforms.
Both profiles checked 2026-09-04.
Use the table below to compare each provider’s documented scope.
Before you decide
Cartesia Line: Not publicly documented LiveKit Agents: Tiered monthly Cloud plans with included session/calling allowances and inference credits; Enterprise adds custom volume pricing. 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 Cartesia Line include Not publicly documented. For LiveKit Agents, 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: Cartesia Line: Confirm product availability, carrier coverage, models, data handling, and generally available features. LiveKit Agents: Calculator values are examples, not universal quotes. Team owns logic, data policy, reliability, and contact-center operations.
Record your requirements and pilot results in the buyer worksheet →
Swipe or scroll the table to see every column.
| Criterion | Line | LiveKit Agents |
|---|---|---|
| Provider type | Voice agent platform and speech API | Realtime voice agent framework and infrastructure |
| Best fit | Teams that want managed audio plumbing while retaining code-level control over reasoning, tools, and external APIs. | Engineering teams that want to choose pipeline architecture and pair agent infrastructure with their own application logic. |
| Key capabilities | realtime voices; agent configuration; telephony; tools; API | open-source framework; WebRTC; SIP; provider plugins; deployment tooling |
| Team sizes | startup; mid-market; enterprise; developer | startup; mid-market; enterprise; developer |
| Call surfaces | phone / PSTN; API / SDK | WebRTC; SIP; phone / PSTN; mobile; web |
| Voice stack | Cascaded STT-LLM-TTS using Cartesia TTS | Configurable pipeline with native realtime model support |
| Telephony | Not publicly documented | SIP trunking; carrier integration |
| Call controls | Not publicly documented | Not publicly documented |
| Languages | Not publicly documented | Not publicly documented |
| Integrations | Not publicly documented | Not publicly documented |
| Knowledge and data | Not publicly documented | Not publicly documented |
| Pricing model | Not publicly documented | Tiered monthly Cloud plans with included session/calling allowances and inference credits; Enterprise adds custom volume pricing. |
| Pricing signal | Approximately $0.06/min plus about $0.014/min managed telephony; verify current calculator. | Calculator examples include roughly $0.01 session, $0.01 telephony, $0.0014 LLM, $0.0058 STT, $0.03 TTS, and $0.01 observability; inputs vary. |
| Free plan or trial | Not publicly documented | Not publicly documented |
| What stands out | 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. | LiveKit documents three pipeline modes—STT-LLM-TTS, speech-to-speech realtime, and half-cascade—alongside Cloud deployment, observability, inference credits, and telephony. |
| Considerations | Confirm product availability, carrier coverage, models, data handling, and generally available features. | Calculator values are examples, not universal quotes. Team owns logic, data policy, reliability, and contact-center operations. |
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.
Engineering teams that want to choose pipeline architecture and pair agent infrastructure with their own application logic.
LiveKit documents three pipeline modes—STT-LLM-TTS, speech-to-speech realtime, and half-cascade—alongside Cloud deployment, observability, inference credits, and telephony.
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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