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Telnyx Voice AI Agents vs Ultravox

Telnyx Voice AI Agents 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. On compliance, Telnyx Voice AI Agents additionally documents SOC 2, HIPAA, GDPR. For coding-agent use, Telnyx Voice AI Agents scores higher on agent-friendliness (80 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)
FieldTelnyx Voice AI AgentsUltravox
Starting price$0.05 minute$0.05 minute
Pricing modelUsageUsage
Free tier✗✗
Self-serve signup✓✓
SOC 2Type II·
HIPAA✓·
GDPR✓·
Webhooks✓✓
Sandbox✗✗
Documented actions2620

Full data and citations: Telnyx Voice AI Agents · Ultravox. See more Realtime Voice Agent APIs.