Features, pricing, and fit
Compare ConversationRelay and Parloa AMP on voice capabilities, pricing, and fit.
Compare Twilio ConversationRelay and Parloa AMP for AI phone agents, then match channels, workflows, and deployment models to your call flow.
Programmable Voice component that connects a TwiML ConversationRelay session to an application WebSocket for STT/TTS, language settings, DTMF, and call events.
Developers building their own voice-agent logic while keeping telephony, media handling, and call control in Twilio.
Explore its buying criteria: AI phone agents · Voice AI platforms.
End-to-end agent management platform that turns natural-language briefs into governed voice and digital workflows, then simulates, deploys, and monitors them.
Large contact centers needing centralized lifecycle control across brands, regions, channels, and task complexity.
Explore its buying criteria: AI phone agents · Contact-center AI · Conversation builders.
Both profiles checked 2026-09-04.
Use the table below to compare each provider’s documented scope.
Before you decide
Twilio ConversationRelay: Usage-based Programmable Voice minutes and phone numbers, plus ConversationRelay per-minute charges; model, provider, and other call features are separate. Parloa AMP: Consumption-based enterprise pricing tied to task complexity and effort, with proposals scoped to interaction volume and use case. 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 Twilio ConversationRelay include Not publicly documented. For Parloa AMP, 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: Twilio ConversationRelay: Not a packaged agent. Region, carrier, recording, compliance, model, and application responsibilities remain with the implementer. Parloa AMP: Request the task-complexity definition plus services, languages, concurrency, carrier, and model costs.
Record your requirements and pilot results in the buyer worksheet →
Swipe or scroll the table to see every column.
| Criterion | ConversationRelay | Parloa AMP |
|---|---|---|
| Provider type | Telephony voice-agent runtime | Enterprise contact-center voice AI |
| Best fit | Developers building their own voice-agent logic while keeping telephony, media handling, and call control in Twilio. | Large contact centers needing centralized lifecycle control across brands, regions, channels, and task complexity. |
| Key capabilities | phone audio streaming; speech interface; interruptions; WebSocket protocol; TwiML controls | agent design; phone automation; enterprise integrations; testing; agent management |
| Team sizes | startup; mid-market; enterprise; developer | enterprise; contact centers |
| Call surfaces | phone / PSTN; WebSocket | phone / PSTN; API / SDK |
| Voice stack | Cascaded speech interface with developer-supplied LLM | Cascaded speech pipeline |
| Telephony | Twilio Programmable Voice; phone numbers; SIP | Not publicly documented |
| 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 | Usage-based Programmable Voice minutes and phone numbers, plus ConversationRelay per-minute charges; model, provider, and other call features are separate. | Consumption-based enterprise pricing tied to task complexity and effort, with proposals scoped to interaction volume and use case. |
| Pricing signal | ConversationRelay $0.07/min; US local outbound $0.014, inbound $0.0085, SIP $0.004, number $1.15/month. | Consumption and task-complexity based enterprise contract; no public rate. |
| Free plan or trial | Not publicly documented | Not publicly documented |
| What stands out | ConversationRelay handles the live call’s STT/TTS and session transport, then sends prompts, audio-control events, and optional DTMF over a required secure WebSocket to the application. | Parloa documents natural-language agent briefs, large multi-turn simulation and regression testing, versioning and approvals, and outcome analytics before and after deployment. |
| Considerations | Not a packaged agent. Region, carrier, recording, compliance, model, and application responsibilities remain with the implementer. | Request the task-complexity definition plus services, languages, concurrency, carrier, and model costs. |
Developers building their own voice-agent logic while keeping telephony, media handling, and call control in Twilio.
ConversationRelay handles the live call’s STT/TTS and session transport, then sends prompts, audio-control events, and optional DTMF over a required secure WebSocket to the application.
Large contact centers needing centralized lifecycle control across brands, regions, channels, and task complexity.
Parloa documents natural-language agent briefs, large multi-turn simulation and regression testing, versioning and approvals, and outcome analytics before and after deployment.
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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