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.

Speechmatics publishes 4 APIs on the APIs.io network, including API Keys API, Jobs API, Projects API, and 1 more. Tagged areas include Speech Recognition, Speech-to-Text, Transcription, Real-Time Transcription, and Batch Transcription.

The Speechmatics catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Speechmatics’ developer surface includes authentication, documentation, engineering blog, pricing, developer portal, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

50.4/100 developing ▬ flat Agent 28/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFreemiumSelf serve⚡ Free to try

7 APIs

Speech Recognition Speech-to-Text TranscriptionReal-Time TranscriptionBatch TranscriptionSpeaker Diarization Text-to-Speech Voice AI NLP Audio Processing WebSocket REST

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 50.4/100 · developing

Contract Quality 16.2 / 25

Developer Ergonomics 7.6 / 20

Access Clarity 11.6 / 20

Operational Transparency 6.5 / 13

Contract Governance 1.2 / 12

Discoverability 7.4 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/speechmatics: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Rate Limits 1

Documented rate limits and quota policies.

Speechmatics Rate Limits

11 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

JobConfig

14 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

Discord

Discord

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: speechmatics
name: Speechmatics
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/speechmatics.png
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: '0.23'
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: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
  - APIKeys
  tags_raw:
  - 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
- aid: speechmatics:speechmatics-api-keys-api
  name: Speechmatics API Keys API
  description: The API Keys API from Speechmatics — 2 operation(s) for api keys.
  humanURL: https://docs.speechmatics.com/speech-to-text/batch
  baseURL: https://asr.api.speechmatics.com/v2
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/speechmatics-api-keys-api-openapi.yml
  - type: Documentation
    url: https://docs.speechmatics.com/speech-to-text/batch
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/batch/speechmatics-asr-rest-api
- aid: speechmatics:speechmatics-jobs-api
  name: Speechmatics Jobs API
  description: The Jobs API from Speechmatics — 4 operation(s) for jobs.
  humanURL: https://docs.speechmatics.com/speech-to-text/batch
  baseURL: https://asr.api.speechmatics.com/v2
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/speechmatics-jobs-api-openapi.yml
  - type: Documentation
    url: https://docs.speechmatics.com/speech-to-text/batch
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/batch/speechmatics-asr-rest-api
- aid: speechmatics:speechmatics-projects-api
  name: Speechmatics Projects API
  description: The Projects API from Speechmatics — 2 operation(s) for projects.
  humanURL: https://docs.speechmatics.com/speech-to-text/batch
  baseURL: https://asr.api.speechmatics.com/v2
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/speechmatics-projects-api-openapi.yml
  - type: Documentation
    url: https://docs.speechmatics.com/speech-to-text/batch
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/batch/speechmatics-asr-rest-api
- aid: speechmatics:speechmatics-usage-api
  name: Speechmatics Usage API
  description: The Usage API from Speechmatics — 1 operation(s) for usage.
  humanURL: https://docs.speechmatics.com/speech-to-text/batch
  baseURL: https://asr.api.speechmatics.com/v2
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/speechmatics-usage-api-openapi.yml
  - type: Documentation
    url: https://docs.speechmatics.com/speech-to-text/batch
  - type: APIReference
    url: https://docs.speechmatics.com/api-ref/batch/speechmatics-asr-rest-api
common:
- type: AgenticAccess
  url: agentic-access/speechmatics-agentic-access.yml
- 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

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