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Categories · Text-to-Speech APIs

Cartesia (Sonic) vs LMNT

Cartesia (Sonic) and LMNT are both Text-to-Speech APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. On compliance, Cartesia (Sonic) additionally documents HIPAA, GDPR. For coding-agent use, Cartesia (Sonic) scores higher on agent-friendliness (50 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)
FieldCartesia (Sonic)LMNT
Starting price$50 1M characters$0.04 1K characters
Pricing modelHybridHybrid
Free tier✓✓
Self-serve signup✓✓
SOC 2Type IIType II
HIPAA✓·
GDPR✓·
Webhooks✗✗
Sandbox✗✗
Documented actions176

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