Categories · Speech-to-Text & Transcription APIs

AssemblyAI vs Azure AI Speech to Text

AssemblyAI and Azure AI Speech to Text 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. Azure AI Speech to Text offers a free tier while AssemblyAI does not, so Azure AI Speech to Text is easier to trial before committing. For coding-agent use, AssemblyAI scores higher on agent-friendliness (70 vs 65).

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	AssemblyAI	Azure AI Speech to Text
Starting price	$0.0025 minute	$1 hour of audio
Pricing model	Usage	Usage
Free tier	✗	✓
Self-serve signup	✓	✓
SOC 2	Type II	Type II
HIPAA	✓	✓
GDPR	✓	✓
Webhooks	✓	✓
Sandbox	✗	✗
Documented actions	22	13

Full data and citations: AssemblyAI · Azure AI Speech to Text. See more Speech-to-Text & Transcription APIs.