Outpero vs Twilio ConversationRelay
Sourced from Twilio ConversationRelay’s published site, verified 14 October 2026. Twilio ConversationRelay’s pricing and features may have changed since — if something below is out of date, let us know.
"Human-friendly voice AI" — Twilio ConversationRelay, the voice-agent product on top of Twilio Programmable Voice.
See how Outpero compares to Twilio ConversationRelay for yourself.
Where they win
Twilio is carrier-grade phone infrastructure with a published $0.07 per minute ConversationRelay rate, a choice of speech-to-text and text-to-speech providers (Google, Amazon, ElevenLabs, Deepgram) and full control of the language model, so an engineering team can build something far more custom than Outpero allows.
Where Outpero wins
ConversationRelay is only the speech layer and Twilio says voice costs and your own LLM are billed separately, while its India guidelines say outbound calls to India can only come from non-Indian numbers; Outpero is a finished calling product with a +91 DLT-registered number and a rupee price.
What building on Twilio ConversationRelay actually requires
Twilio's ConversationRelay page describes bring-your-own-LLM, and its docs have you point a TwiML <Connect><ConversationRelay> at a wss:// WebSocket server you host, which receives the caller's transcribed speech and sends text back — so you write and run the agent's brain yourself, and "voice costs are calculated separately".
This is not a criticism — Twilio ConversationRelay is aimed at engineering teams building something custom. It means the fair comparison isn’t Outpero’s price against theirs; it’s Outpero’s price against theirs plus the model provider costs and the engineering time to assemble and maintain it.
Side by side
| Outpero | Twilio ConversationRelay | |
|---|---|---|
| What you get on day one | A working AI employee — describe the job, it is live | Speech-to-text, text-to-speech and call routing over a WebSocket; you bring the LLM and the application server |
| Published pricing | No setup fee, no monthly fee; Standard ₹5 / Premium ₹6.8 per connected minute from prepaid credits (excl. 18% GST) | ConversationRelay $0.07 per minute in US dollars; voice (carrier) costs calculated separately and your LLM costs are not included |
| India voice rates | Included in the per-minute rate; +91 number ₹649/month with 1 channel | Outbound to India $0.0699 per minute (local) or $0.0496 per minute (mobile); no India number price published on that page |
| Indian languages | Hindi, Telugu, Tamil, Marathi, Kannada, Malayalam and Indian English, switching to English mid-sentence | Not published — no language list on the product or docs page; a "multi" auto-detect mode needs Deepgram and ElevenLabs; Hindi, Tamil and Telugu are not mentioned |
| Inbound calls | AI employee answers your business number 24/7 and remembers returning callers | Supported — the docs example routes an incoming call to ConversationRelay; the agent logic is yours to build |
| Outbound / bulk calling | Instant lead calls within 30 seconds, plus CSV campaigns with calling windows, auto-retries and DND screening | The ConversationRelay docs page covers only an inbound example; outbound campaigns, retries and lists are not part of the product and you would build them |
| Voice broadcast | One fixed message played to a whole list at a lower rate than AI conversation minutes | Not listed as part of ConversationRelay |
| Setup model | Self-serve at app.outpero.com with 50 free credits and no card; no setup fee | Developer platform with a "Start for free" option; build and host your own WebSocket app server |
| India telephony and compliance | DLT-registered +91 line (₹649/month with 1 channel); bulk campaigns screen against DND | India guidelines: "Outbound calls to India can only be made from international (non-Indian) numbers"; consent required for commercial calls; DLT is not mentioned |
Rows highlighted for Twilio ConversationRelay are areas where their published claims are ahead of Outpero’s on paper — stated plainly rather than left out.
Questions people ask
Is Outpero cheaper than Twilio ConversationRelay?
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Outpero publishes its price on its own site: no setup fee, calls from ₹5/min. Twilio ConversationRelay's pricing: ConversationRelay $0.07 per minute in US dollars; voice (carrier) costs calculated separately and your LLM costs are not included (as published on Twilio ConversationRelay's site, verified 14 October 2026). ConversationRelay is only the speech layer and Twilio says voice costs and your own LLM are billed separately, while its India guidelines say outbound calls to India can only come from non-Indian numbers; Outpero is a finished calling product with a +91 DLT-registered number and a rupee price.
What does Twilio ConversationRelay do better than Outpero?
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Twilio is carrier-grade phone infrastructure with a published $0.07 per minute ConversationRelay rate, a choice of speech-to-text and text-to-speech providers (Google, Amazon, ElevenLabs, Deepgram) and full control of the language model, so an engineering team can build something far more custom than Outpero allows.
What does Outpero do better than Twilio ConversationRelay?
+
ConversationRelay is only the speech layer and Twilio says voice costs and your own LLM are billed separately, while its India guidelines say outbound calls to India can only come from non-Indian numbers; Outpero is a finished calling product with a +91 DLT-registered number and a rupee price.
Do I need a developer to use Twilio ConversationRelay?
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Twilio's ConversationRelay page describes bring-your-own-LLM, and its docs have you point a TwiML <Connect><ConversationRelay> at a wss:// WebSocket server you host, which receives the caller's transcribed speech and sends text back — so you write and run the agent's brain yourself, and "voice costs are calculated separately".
Other comparisons
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