Decagon Voice 3 price: what is public and how to size a pilot

Decagon's Voice 3 launch post lists no price. How to size a voice-agent pilot in call minutes, and what the speech parts cost on public rate cards.

5 min readSume
All posts

The Voice 3 launch post and the Dialogues 2026 post that we read list no price, so the only honest answer to what Decagon Voice 3 costs is to ask Decagon for a quote. You can still size a pilot in call minutes now and compare it with the public prices of the speech pieces.

Size the pilot first

Pricing quotes depend on volume, so bring numbers.

  • Calls per month, split by easy and hard.
  • Average minutes per call.
  • Share you expect the agent to resolve without a human.
  • Languages needed, since Decagon lists 70+.
  • Whether you need after-call transcripts for review.

Public prices for the speech parts

For comparison only, the building blocks of a do-it-yourself stack have public list prices. A packaged agent adds reasoning, tools, guardrails and support on top.

Public speech prices (read 2026-10-07)
PartList priceSource
Streaming transcription$0.54 per hour introductory, through the end of 2026Microsoft AI
Speech from text, Flash$15 per 1M charactersMicrosoft AI
Batch transcription (Sume STT)$0.01 per audio minuteSume rate card

A rough example

For 6,000 minutes a month, the Microsoft streaming transcription rate comes to about $54 at $0.54 per hour (100 hours). That is one small part of the cost. The rest is the language model, tools and ops, so a quote is the only way to compare.

Use Sume for review, not for the live call

After a pilot starts, you will want recordings reviewed. Sume's STT turns a recording into text and word timings at $0.01 per audio minute, so reviewing 6,000 minutes costs about $60 at the public rate. Each job reserves up to 10 minutes, so split longer calls first.

Sources

Related posts

More in Pricing

All Pricing posts

Written by Sume