OpenAI Realtime API (gpt-realtime) vs Vocode

OpenAI Realtime API (gpt-realtime) and Vocode are both Realtime Voice Agent APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Vocode offers a free tier while OpenAI Realtime API (gpt-realtime) does not, so Vocode is easier to trial before committing. On compliance, OpenAI Realtime API (gpt-realtime) additionally documents SOC 2, HIPAA, GDPR. For coding-agent use, OpenAI Realtime API (gpt-realtime) scores higher on agent-friendliness (50 vs 45).

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	OpenAI Realtime API (gpt-realtime)	Vocode
Starting price	$0.02 minute (audio input)	-
Pricing model	Usage	Usage
Free tier	✗	✓
Self-serve signup	✓	✓
SOC 2	Type II	·
HIPAA	✓	✗
GDPR	✓	·
Webhooks	✓	✓
Sandbox	✗	✗
Documented actions	17	19

Full data and citations: OpenAI Realtime API (gpt-realtime) · Vocode. See more Realtime Voice Agent APIs.