Speechmatics website screenshot

Speechmatics

Speechmatics is an enterprise-grade speech intelligence platform headquartered in Cambridge, UK, offering highly accurate speech-to-text APIs supporting 55+ languages with batch and real-time transcription modes. The platform provides REST APIs for batch transcription job management and WebSocket APIs for low-latency real-time streaming transcription, along with speaker diarization, speaker identification, custom vocabulary, sentiment analysis, translation, and topic detection. Speechmatics also offers a Text-to-Speech API, a Voice Agent API (early access), and a Management API for programmatic account and API key management. Deployments are available as cloud SaaS, containerized on-premises, Kubernetes, and virtual appliance options.

4 APIs 0 Features
Speech RecognitionSpeech-to-TextTranscriptionReal-Time TranscriptionBatch TranscriptionSpeaker DiarizationText-to-SpeechVoice AINLPAudio ProcessingWebSocketREST

APIs

Speechmatics Batch Transcription API

REST API for submitting audio files for asynchronous batch transcription, managing jobs, and retrieving transcripts with support for 55+ languages, diarization, translation, and...

Speechmatics Realtime Transcription API

WebSocket API for low-latency real-time streaming transcription supporting live audio input, speaker diarization, and partial/final transcript events.

Speechmatics Management API

REST API for programmatic management of projects, API keys, usage tracking, and account administration.

Speechmatics Text-to-Speech API

REST API for converting text to natural-sounding speech with multiple voice options and language support.

Pricing Plans

Rate Limits

Speechmatics Rate Limits

0 limits

RATE LIMITS

FinOps

Semantic Vocabularies

Speechmatics Context

13 classes · 18 properties

JSON-LD

Example Payloads

Resources

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TrustCenter
TrustCenter
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DomainSecurity
DomainSecurity
🔑
Authentication
Authentication
🔗
Website
Website
🔗
Documentation
Documentation
👥
GitHubOrganization
GitHubOrganization
🔗
LinkedIn
LinkedIn
🔗
X
X
📰
Blog
Blog
💰
Pricing
Pricing
🟢
StatusPage
StatusPage
🌐
Portal
Portal
🔗
Discord
Discord
🔗
Plans
Plans
🔗
RateLimits
RateLimits
🔗
FinOps
FinOps

Sources

Raw ↑
aid: speechmatics
name: Speechmatics
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/speechmatics/refs/heads/main/apis.yml
created: 2026-06-12
modified: 2026-06-12
artifacts:
- type: OpenAPI
  url: openapi/speechmatics-batch-transcription-api-openapi.yml
- type: OpenAPI
  url: openapi/speechmatics-management-api-openapi.yml
- type: JSONSchema
  url: json-schema/speechmatics-job-config.json
- type: JSONLDContext
  url: json-ld/speechmatics-context.jsonld
- type: Vocabulary
  url: vocabulary/speechmatics-vocabulary.yml
- type: Examples
  url: examples/speechmatics-batch-transcription-job.json
specificationVersion: '0.19'
description: 'Speechmatics is an enterprise-grade speech intelligence platform headquartered in Cambridge, UK, offering highly
  accurate speech-to-text APIs supporting 55+ languages with batch and real-time transcription modes. The platform provides
  REST APIs for batch transcription job management and WebSocket APIs for low-latency real-time streaming transcription, along
  with speaker diarization, speaker identification, custom vocabulary, sentiment analysis, translation, and topic detection.
  Speechmatics also offers a Text-to-Speech API, a Voice Agent API (early access), and a Management API for programmatic account
  and API key management. Deployments are available as cloud SaaS, containerized on-premises, Kubernetes, and virtual appliance
  options.

  '
tags:
- Speech Recognition
- Speech-to-Text
- Transcription
- Real-Time Transcription
- Batch Transcription
- Speaker Diarization
- Text-to-Speech
- Voice AI
- NLP
- Audio Processing
- WebSocket
- REST
apis:
- aid: speechmatics:batch-transcription-api
  name: Speechmatics Batch Transcription API
  description: REST API for submitting audio files for asynchronous batch transcription, managing jobs, and retrieving transcripts
    with support for 55+ languages, diarization, translation, and custom vocabulary.
  humanURL: https://docs.speechmatics.com/speech-to-text/batch
  baseURL: https://asr.api.speechmatics.com/v2
  tags:
  - Batch Transcription
  - REST
  - Speech-to-Text
  properties:
  - type: Documentation
    url: https://docs.speechmatics.com/speech-to-text/batch
  - type: OpenAPI
    url: https://docs.speechmatics.com/batch.yaml
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/batch/speechmatics-asr-rest-api
- aid: speechmatics:realtime-transcription-api
  name: Speechmatics Realtime Transcription API
  description: WebSocket API for low-latency real-time streaming transcription supporting live audio input, speaker diarization,
    and partial/final transcript events.
  humanURL: https://docs.speechmatics.com/speech-to-text/realtime
  baseURL: wss://eu2.rt.speechmatics.com/v2
  tags:
  - Real-Time Transcription
  - WebSocket
  - Streaming
  - Speech-to-Text
  properties:
  - type: Documentation
    url: https://docs.speechmatics.com/speech-to-text/realtime
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/realtime-transcription-websocket
- aid: speechmatics:management-api
  name: Speechmatics Management API
  description: REST API for programmatic management of projects, API keys, usage tracking, and account administration.
  humanURL: https://docs.speechmatics.com/api-ref/management/management-api
  baseURL: https://mp.speechmatics.com/v1
  tags:
  - Management
  - REST
  - API Keys
  properties:
  - type: Documentation
    url: https://docs.speechmatics.com/api-ref/management/management-api
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/management/management-api
- aid: speechmatics:text-to-speech-api
  name: Speechmatics Text-to-Speech API
  description: REST API for converting text to natural-sounding speech with multiple voice options and language support.
  humanURL: https://docs.speechmatics.com/text-to-speech
  baseURL: https://mp.speechmatics.com/v1
  tags:
  - Text-to-Speech
  - REST
  - Voice Synthesis
  properties:
  - type: Documentation
    url: https://docs.speechmatics.com/text-to-speech
common:
- type: TrustCenter
  url: security/speechmatics-trust-center.yml
- type: DomainSecurity
  url: security/speechmatics-domain-security.yml
- type: Authentication
  url: authentication/speechmatics-authentication.yml
- type: Website
  url: https://www.speechmatics.com/
- type: Documentation
  url: https://docs.speechmatics.com/
- type: GitHubOrganization
  url: https://github.com/speechmatics
- type: LinkedIn
  url: https://www.linkedin.com/company/speechmatics
- type: X
  url: https://x.com/Speechmatics
- type: Blog
  url: https://www.speechmatics.com/company/articles-and-news/articles
- type: Pricing
  url: https://www.speechmatics.com/pricing
- type: StatusPage
  url: https://status.speechmatics.com/
- type: Portal
  url: https://portal.speechmatics.com/
- type: Discord
  url: https://discord.gg/speechmatics
- type: Plans
  url: plans/speechmatics-plans-pricing.yml
- type: RateLimits
  url: rate-limits/speechmatics-rate-limits.yml
- type: FinOps
  url: finops/speechmatics-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com