Deepgram Voice Agent API vs Retell AI

Deepgram Voice Agent API and Retell AI are both Realtime Voice Agent APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Retell AI starts lower at $0.06 per minute vs $0.07 for Deepgram Voice Agent API. Retell AI supports webhooks for event-driven integration; the other does not document them. For coding-agent use, Retell AI scores higher on agent-friendliness (65 vs 55).

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	Retell AI
Starting price	$0.07 minute	$0.06 minute
Pricing model	Usage	Usage
Free tier	✗	✗
Self-serve signup	✓	✓
SOC 2	Type II	Type II
HIPAA	✓	✓
GDPR	✓	✓
Webhooks	✗	✓
Sandbox	✗	✗
Documented actions	16	29

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