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Categories · Text-to-Speech APIs

Cartesia (Sonic) vs Deepgram Aura (Text to Speech)

Cartesia (Sonic) and Deepgram Aura (Text to Speech) 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 Deepgram Aura (Text to Speech) does not, so Cartesia (Sonic) is easier to trial before committing. Deepgram Aura (Text to Speech) supports webhooks for event-driven integration; the other does not document them. For coding-agent use, Deepgram Aura (Text to Speech) 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)
FieldCartesia (Sonic)Deepgram Aura (Text to Speech)
Starting price$50 1M characters$0 1,000 characters
Pricing modelHybridUsage
Free tier✓✗
Self-serve signup✓✓
SOC 2Type IIType II
HIPAA✓✓
GDPR✓✓
Webhooks✗✓
Sandbox✗✗
Documented actions179

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