What it sells
The best way to build Voice AI apps
Business model breakdown
Buyer: who owns the budget?
UnverifiedEngineering / product teams at software companies (developer-led).
Trigger: what makes them buy now?
Need accurate transcription and speech understanding embedded in a product; Siro reports 90% fewer customer complaints.
Workflow: what inputs become what output?
Developer calls API with audio, optionally adds features (diarization, keyterms prompting, medical mode), gets transcript and understanding outputs back.
Economics: what it saves and how it charges
Usage-based per audio hour with add-on feature fees; custom rates for volume.
Distribution: how it reaches customers
Self-serve API signup with free credits, docs/playground, plus Contact sales for enterprise.
Funding history and coverage
| Round date | Stage | Amount | Investors | Source |
|---|---|---|---|---|
| — | Y Combinator Summer 2017 | — | Y Combinator | ycombinator.com |
Profiles summarize public reporting and company websites. Business-model notes are MaxBC's reading of that material, not confirmed facts; unknowns are left blank rather than guessed. Updated 2026-10-12.