Features, pricing, and fit
Compare ElevenLabs Agents and Ultravox on voice capabilities, pricing, and fit.
Compare ElevenLabs Agents and Ultravox 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.
API-first native speech-language model with a no-code Console, custom tools, and bring-your-own telephony for phone, web, and native apps.
Engineering teams that want direct speech processing and control over telephony or app transports.
Explore its buying criteria: AI phone agents · Voice AI platforms.
ElevenLabs Agents checked 2026-10-09; Ultravox 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. Ultravox: Pay-as-you-go and Pro plans combine a published per-minute rate with monthly plan fees; Enterprise is custom, and SIP is priced separately. 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 Ultravox, 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. Ultravox: Open weights do not remove hosting, latency, safety, evaluation, voice, and telephony work. Review license and SLA.
Record your requirements and pilot results in the buyer worksheet →
Swipe or scroll the table to see every column.
| Criterion | ElevenLabs Agents | Ultravox |
|---|---|---|
| Provider type | Voice agent platform and speech API | Native speech-language model API |
| Best fit | Teams that need a managed voice library and agent workflows spanning telephony, web, and mobile. | Engineering teams that want direct speech processing and control over telephony or app transports. |
| Key capabilities | voice library; custom voices; tools; knowledge bases; phone and web agents | direct speech-language interaction; open weights; hosted API; tools; realtime sessions |
| 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 | Native speech-language model |
| 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. | Pay-as-you-go and Pro plans combine a published per-minute rate with monthly plan fees; Enterprise is custom, and SIP is priced separately. |
| 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. | 30 free minutes; $0.05/min pay-as-you-go; Pro $100/month; SIP about $0.005/min. |
| Free plan or trial | Free plan includes 15 minutes. | 30 free minutes; open weights under published license. |
| What stands out | ElevenAgents combines ElevenLabs voice selection and cloning with visual workflow building, custom LLM options, conversation controls, and evaluation tooling. | Ultravox documents a native speech path without a separate ASR stage, then exposes both Console prototyping and REST/SDK integration with BYOT telephony. |
| 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. | Open weights do not remove hosting, latency, safety, evaluation, voice, and telephony work. Review license and SLA. |
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.
Engineering teams that want direct speech processing and control over telephony or app transports.
Ultravox documents a native speech path without a separate ASR stage, then exposes both Console prototyping and REST/SDK integration with BYOT 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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