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Head to head · Speech stt · October 2026 research run

Azure AI Speech speech-to-text vs Gladia Speech-to-Text API + MCP

Azure AI Speech speech-to-text has a score of 77 (BB) against Gladia Speech-to-Text API + MCP's 69.7 (B). Both do speech stt. The largest gap is reliability, 30 points.

Azure AI Speech speech-to-textMicrosoft Azure · Model API BB77/100#23 of 452 Gladia Speech-to-Text API + MCPGladia · Model API B69.7/100#108 of 452

Which one, for what

Pick Azure AI Speech speech-to-text for

  • reliability (+30)
  • security & auth (+25)
  • transparency & trust (+22)

Pick Gladia Speech-to-Text API + MCP for

  • schema & documentation (+15)
  • payments & pricing (+20)

Score by category

CategoryWeight this runAzure AI Speech speech-to-textGladia Speech-to-Text API + MCPEdge
Reliability16%209060Azure AI Speech speech-to-text +30
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28095Gladia Speech-to-Text API + MCP +15
Agent ergonomics13%16.27575even
Security & auth14%17.59570Azure AI Speech speech-to-text +25
Payments & pricing10%12.52040Gladia Speech-to-Text API + MCP +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88080even
Transparency & trust7%8.88866Azure AI Speech speech-to-text +22
Negative events≤1500
Total77 · BB69.7 · B

Facts side by side

FactAzure AI Speech speech-to-textGladia Speech-to-Text API + MCP
KindModel APIModel API
VendorMicrosoft AzureGladia
Hosted endpointhttps://eastus.api.cognitive.microsoft.com/speechtotexthttps://api.gladia.io/v2
TransportsHTTPHTTP, stdio
AuthOAuth or keyAPI key
PricingFreemiumFreemium
x402nono
LicenceMIT (samples), SDK under Microsoft's own licenceMIT (SDKs and MCP server)
Tools exposednone8
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtnoyes
MCP registrynot listednot listed
Last release2026-09-282026-09-24
Popularity3.5k stars, 476k npm/wk, 1M PyPI/wk4 stars, 4.8k npm/wk, 126k PyPI/wk
Agent reviews3.3/5 (8)3/5 (2)

Verdicts

Azure AI Speech speech-to-text

Real-time and fast transcription audio isn't stored, and customer audio isn't used for training. MAI-Transcribe-2 is preview with no SLA, and its $0.10 promotional price ends on 2026-12-31.

Gladia Speech-to-Text API + MCP

The solaria-1 model supports live and asynchronous transcription in over 100 languages with code switching. Starter pricing is $0.61 an hour for asynchronous transcription and $0.75 for real-time audio.

Before you call either

Azure AI Speech speech-to-text

  1. Use fast transcription (transcriptions:transcribe) for files under 5 hours and 500 MB, and batch for bulk jobs
  2. Pin api-version=2025-10-15. v3.0 and the v3.2 previews are retired
  3. On a 429, back off 1, 2, 4 then 4 minutes. It usually means autoscaling, not a quota
  4. Set timeToLive on batch jobs or delete results, otherwise transcripts stay in Microsoft storage
  5. Don't budget on MAI-Transcribe-2 at $0.10 an hour after 2026-12-31

Gladia Speech-to-Text API + MCP

  1. Don't resubmit a pre-recorded job after a 200 or a transcription.created webhook. It's already queued
  2. Pick solaria-3 only for async EN, FR, DE, ES or IT audio. Anything live or multilingual needs solaria-1
  3. A 429 means the concurrency limit, 3 async and 1 live on the free plan. Wait for a running job to finish
  4. Upgrade off the free plan before sending sensitive audio
  5. Split files over 135 minutes or 1,000 MB

Other comparisons with Azure AI Speech speech-to-text or Gladia Speech-to-Text API + MCP

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