Cartesia (Sonic) vs Murf AI

Cartesia (Sonic) and Murf AI are both Text-to-Speech APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Cartesia (Sonic) offers a free tier while Murf AI does not, so Cartesia (Sonic) is easier to trial before committing. Murf AI supports webhooks for event-driven integration; the other does not document them. For coding-agent use, Murf AI scores higher on agent-friendliness (55 vs 50).

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	Cartesia (Sonic)	Murf AI
Starting price	$50 1M characters	$0 1,000 characters
Pricing model	Hybrid	Usage
Free tier	✓	✗
Self-serve signup	✓	✓
SOC 2	Type II	Type II
HIPAA	✓	✓
GDPR	✓	✓
Webhooks	✗	✓
Sandbox	✗	✗
Documented actions	17	15

Full data and citations: Cartesia (Sonic) · Murf AI. See more Text-to-Speech APIs.