# Azure AI Speech (STT) Review

> Azure AI Speech (STT) review: Enterprise-grade STT inside the Azure cloud ecosystem. Verified pricing, features, and the strongest alternatives in.

![Azure AI Speech (STT) logo](https://www.versusref.com/logos/azure-speech.png)

Enterprise-grade STT inside the Azure cloud ecosystem

Among the 43 speech-to-text tools we track, Azure AI Speech (STT) has the 1st-widest language coverage - a fit for multilingual and localization projects.

From $1,600/mo · facts verified Jul 24, 2026

## What we know about Azure AI Speech (STT)

Azure AI Speech (STT) is a speech-to-text apis platform: enterprise-grade STT inside the Azure cloud ecosystem. This profile tracks every Azure AI Speech (STT) fact we have verified, each linked to a primary source and dated.

On pricing, Azure AI Speech (STT) starts at $1,600 per month for its entry tier. That is the sticker rate: real production cost usually runs higher once you add a language model, a voice provider, and telephony minutes.

On capabilities, Azure AI Speech (STT) covers language auto-detection, word-level timestamps, custom vocabulary / keyterm boosting, speech translation, soc 2 type ii, and gdpr / eu data residency, and does not offer entity detection, sentiment analysis, and summarization endpoint. Each of those is verified against Azure AI Speech (STT)'s own docs or dashboard, not marketing copy.

For compliance, with Azure AI Speech (STT): SOC 2 Type II is in place. If you are in a regulated space, confirm the current posture with Azure AI Speech (STT) before you commit, since these change plan by plan.

Among the 43 speech-to-text tools in our matrix, Azure AI Speech (STT) leads with the 1st-widest language coverage; the fact sheet below has the raw numbers behind that placement.

Since we started tracking Azure AI Speech (STT), 1 verified fact change has landed in its record - the "What changed recently" section below has the specifics.

In total we track 29 verified facts for Azure AI Speech (STT) today, each linking the primary source it came from so you can check our work - and vendor claims we have not measured ourselves are labeled as such on the Azure AI Speech (STT) fact sheet below.

## Azure AI Speech (STT) pricing

Published rates: batch $0.003/min · streaming $0.0167/min, verified Jul 20, 2026 ([source](https://prices.azure.com/api/retail/prices?%24filter=contains(productName,%20%27Speech%27)%20and%20armRegionName%20eq%20%27eastus%27&currencyCode=USD)).

| Monthly volume | Batch bill | Streaming bill |
| --- | --- | --- |
| 1K min/mo | $3 | $16.67 |
| 10K min/mo | $30 | $166.67 |
| 100K min/mo | $300 | $1,666.70 |

Sticker rates only; diarization and PII redaction add-ons price in the stack builder.

## Fact sheet

### Pricing

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| Batch price per audio minute | 0.003 $/audio-min | Jul 20 | [source](https://prices.azure.com/api/retail/prices?%24filter=contains(productName,%20%27Speech%27)%20and%20armRegionName%20eq%20%27eastus%27&currencyCode=USD) |
| Streaming price per audio minute | 0.017 $/audio-min | Jul 20 | [source](https://prices.azure.com/api/retail/prices?%24filter=contains(productName,%20%27Speech%27)%20and%20armRegionName%20eq%20%27eastus%27&currencyCode=USD) |
| Pricing model | usage | Jul 20 | [source](https://azure.microsoft.com/en-us/pricing/details/speech/) |
| Cheapest paid plan | $1,600 | Jul 20 | [source](https://prices.azure.com/api/retail/prices?%24filter=contains(productName,%20%27Speech%27)%20and%20armRegionName%20eq%20%27eastus%27&currencyCode=USD) |
| Free tier quota | 5 audio hours/mo realtime (F0), shared standard+custom | Jul 20 | [source](https://azure.microsoft.com/en-us/pricing/details/speech/) |
| Published volume discounts | Commitment tiers: 2K hrs $1,600/mo to 100K hrs $40,000/mo | Jul 20 | [source](https://prices.azure.com/api/retail/prices?%24filter=contains(productName,%20%27Speech%27)%20and%20armRegionName%20eq%20%27eastus%27&currencyCode=USD) |
| Concurrency on base plan | 100 concurrent requests (S0 default, adjustable) | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-services-quotas-and-limits) |
| Extra concurrency cost | No charge; higher limits via support request | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-services-quotas-and-limits) |

### Capabilities

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| WER (third-party benchmark) | 3.69 % WER | Jul 20 | [source](https://artificialanalysis.ai/speech-to-text) |
| Languages supported | 148 locales | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/language-support?tabs=stt) |
| Language auto-detection | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-to-text) |
| Speaker diarization | ✓  Included | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/fast-transcription-create) |
| Diarization add-on price per minute | null | Jul 24 | [source](https://azure.microsoft.com/en-us/pricing/details/cognitive-services/speech-services/) |
| PII redaction | ✗  Not available | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/call-center-overview) |
| Word-level timestamps | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/fast-transcription-create) |
| Custom vocabulary / keyterm boosting | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-to-text) |
| Entity detection | ✗  No | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/call-center-overview) |
| Sentiment analysis | ✗  No | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/call-center-overview) |
| Summarization endpoint | ✗  No | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/call-center-overview) |
| Speech translation | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/overview) |
| Priced audio-intelligence add-ons | Realtime diarization/lang ID $0.30/hr; translation $2.50/hr | Jul 20 | [source](https://prices.azure.com/api/retail/prices?%24filter=contains(productName,%20%27Speech%27)%20and%20armRegionName%20eq%20%27eastus%27&currencyCode=USD) |

### Compliance & trust

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| HIPAA BAA available | ✓  Included | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/compliance/offerings/offering-hipaa-us) |
| SOC 2 Type II | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/compliance/offerings/offering-soc-2) |
| GDPR / EU data residency | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/regions) |
| Self-host / on-prem option | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-container-howto) |

### Build experience

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| Official SDKs | C#, C++, Go, Java, JavaScript, Objective-C, Swift, Python | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-sdk) |
| Max file size / duration | Batch 1 GB/file; fast <500 MB and <5 hr/file | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-services-quotas-and-limits) |
| Supported audio formats | WAV, MP3, OGG/OPUS, FLAC, WMA, AAC, AMR, WebM, SPEEX | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/fast-transcription-create) |
| Websocket streaming API | ✓  Yes | Jul 20 | [source](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-container-howto) |

## Azure AI Speech (STT) head-to-head

| Comparison | Record | Per use case |
| --- | --- | --- |
| [Azure AI Speech (STT) vs Google Cloud Speech-to-Text](https://www.versusref.com/stt/azure-speech-vs-google-stt/) | won 4 · lost 0 · tied 3 | Call Centers: won; Developers: won; Dictation: tie; Medical: tie; Meetings: won; Self-Hosted: tie; Voice Agents: won |
| [Azure AI Speech (STT) vs Deepgram](https://www.versusref.com/stt/azure-speech-vs-deepgram/) | won 1 · lost 2 · tied 3 | Developers: won; Dictation: tie; Medical: lost; Meetings: tie; Self-Hosted: tie; Voice Agents: lost |

## What changed recently

| Date | Tool | Change |
| --- | --- | --- |
| Jul 24, 2026 | Azure AI Speech (STT) | Diarization add-on price per minute: 0.005 → n/a |

Source: https://www.versusref.com/stt/tools/azure-speech/