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Speech to Text API

API service

by Speechmatics

Speechmatics' automatic speech recognition API transcribes audio into text in 55+ languages in either real-time streaming or batch mode, with speaker diarization, custom dictionary, translation and summarization options.

Find alternatives to Speech to Text API

Free plan gives $100 in credit with no credit card and 2 concurrent real-time sessions. Pro is metered per hour of audio: Batch Melia 1 $0.129/hr, Batch Standard $0.24/hr, Batch Enhanced $0.40/hr, Real-time Standard $0.24/hr, Real-time Enhanced $0.43/hr, with a 20% discount over 500 hr/month. Metered add-ons on the same job: Translation $0.65/hr, Summaries $0.12/hr, Chapters $0.40/hr, Sentiment $0.12/hr, Topics $0.20/hr. Enterprise is custom-quoted with volume discounts from 24,000 hours annually. No monthly subscription fee is published, hence a floor of 0.

What it does

• Speech to text
• Translation
• Summarization
• Data analysis

How it compares

• Deepgram Speech-to-Text

  Deepgram Alternative: Better Accuracy, 55+ Languages, Lower Cost | Speechmatics

  Official documentation · 19 Sep 2026
• AssemblyAI Universal Speech-to-Text API

  Speechmatics vs AssemblyAI: Speech-to-Text Comparison (2026)

  Company disclosure · 23 Sep 2026

Sources

Pricing

Pricing page · 5 Sep 2026

Description

Official documentation · 5 Sep 2026

Product page markets a Speech-to-Text API across 55+ languages, real-time and batch, sub-500ms latency, speaker diarization, alphanumeric recognition.

Sold within

Live re-check 2026-09-15: speechmatics.com/pricing shows Speech-to-Text as its own line with independent price tiers, no parent packaging stated.

Deployment

Official documentation · 5 Sep 2026

Lists On-Prem ('Docker containers, Kubernetes, or a preconfigured virtual appliance'), Cloud and On-Device as the deployment modes; docs.speechmatics.com/deployments documents CPU/GPU speech-to-text containers, a language-ID container and a translation container.

Also from Speechmatics

• Text to Speech API service

  Speechmatics' text-to-speech API generates streaming synthetic English speech from text with sub-150ms latency using four named voices (Sarah, Theo, Megan, Jack), aimed at real-time voice agent use.

• Voice Agent API API service

  Speechmatics' voice agent offering provides a real-time conversational speech API - including the Flow WebSocket endpoint that chains speech-to-text, an LLM, text-to-speech and function calling - plus a Python Voice SDK for turn detection and speaker management, and integrations with Vapi, LiveKit and Pipecat.

• On-Device Speech to Text Developer tool

  A locally-executing speech-to-text engine for Mac and Windows laptops that runs on about one CPU core plus the device's neural engine or GPU and roughly 800MB of memory, sending no audio over a network and claiming accuracy within 5% of the cloud API.

• Translation API service

  Translates a transcript into other languages in the same API call that produces it, for files or live audio. It is a feature switched on inside a Speech to Text request rather than a separate product; the docs file it under Speech to Text and return the translations alongside the transcript.

• Summarization API service

  Generates a short summary of an audio file in the same API call that transcribes it, as paragraphs or bullets. It is a Speech Intelligence feature enabled by adding a config block to a batch Speech to Text job, not a product bought on its own.

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