Categories · Speech-to-Text & Transcription APIs

IBM watsonx Speech to Text vs Soniox

IBM watsonx Speech to Text and Soniox are both Speech-to-Text & Transcription APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Soniox starts lower at $0.0017 per minute vs $0.02 for IBM watsonx Speech to Text. IBM watsonx Speech to Text offers a free tier while Soniox does not, so IBM watsonx Speech to Text is easier to trial before committing. For coding-agent use, Soniox scores higher on agent-friendliness (65 vs 30).

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	IBM watsonx Speech to Text	Soniox
Starting price	$0.02 minute	$0.0017 minute
Pricing model	Usage	Usage
Free tier	✓	✗
Self-serve signup	✓	✓
SOC 2	Type II	Type II
HIPAA	✓	✓
GDPR	✓	✓
Webhooks	✓	✓
Sandbox	✗	✗
Documented actions	17	11

Full data and citations: IBM watsonx Speech to Text · Soniox. See more Speech-to-Text & Transcription APIs.