Deepgram Voice Agent API vs Ultravox

Deepgram Voice Agent API and Ultravox are both Realtime Voice Agent APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Ultravox starts lower at $0.05 per minute vs $0.07 for Deepgram Voice Agent API. On compliance, Deepgram Voice Agent API additionally documents SOC 2, HIPAA, GDPR. Ultravox supports webhooks for event-driven integration; the other does not document them. For coding-agent use, Deepgram Voice Agent API scores higher on agent-friendliness (55 vs 20).

Comparedby a transparent data-readiness score computed from each API's published, sourced fields. No reviews, no paid placement. How we rank.

Data last verified 2026-06-21, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
Field	Deepgram Voice Agent API	Ultravox
Starting price	$0.07 minute	$0.05 minute
Pricing model	Usage	Usage
Free tier	✗	✗
Self-serve signup	✓	✓
SOC 2	Type II	·
HIPAA	✓	·
GDPR	✓	·
Webhooks	✗	✓
Sandbox	✗	✗
Documented actions	16	20

Full data and citations: Deepgram Voice Agent API · Ultravox. See more Realtime Voice Agent APIs.