S

Speechmatics

Infrastructure

Cambridge speech-recognition company selling transcription and real-time speech understanding as an API, deployable in its cloud, on a customer's own servers or on-device — its pitch to buyers with security and compliance constraints.

Total funding—

Valuation—

Employees—

Founded2006

HeadquartersCambridge, United Kingdom

StatusPrivate

Products

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• Speech to Text API API service Sold on its own

  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.

• Text to Speech API service Sold on its own

  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.

Inside Speech to Text

• Translation API service Included with the parent

  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 Included with the parent

  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.

Closest alternatives 2

DDeepgramPrivate · $1.3BSpeechmatics' own /deepgram-alternative page positions itself as the direct alternative to Deepgram for speech-to-text buyers and runs a feature-by-feature comparison (accuracy, languages, pricing, deployment).4 of 6 capabilitiesShared product typeSourced competitorTurn speech into textCompareAAssemblyAIPrivate · $115M raised1 of 6 capabilitiesShared product typeSourced competitorTurn speech into textCompare

Similar products 68

How this list is ranked ↗

NCNAVER CloudPrivateText to Speech and CLOVA Voice do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either.6 of 6 capabilitiesShared product typeCompareCCartesiaPrivateVoice Agent API and Sonic / Ink do comparable work on speech to text and text to speech; both also serve buyers who need to create synthetic voice and audio and turn speech into text; scale not recorded for either.2 of 6 capabilitiesShared product typeCompareRAResemble AIPrivateText to Speech and Resemble Text-to-Speech do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either.3 of 6 capabilitiesShared product typeCompareHAHume AIPrivateText to Speech and Octave TTS do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either.3 of 6 capabilitiesShared product typeCompareUUniphorePrivate · $2.5BSpeech to Text API and Conversation Insights Agent do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships application, data service and 1 more rather than the same layer.4 of 6 capabilitiesDifferent layerCompareFAFireworks AIPrivate · $17.5BSummarization and Fireworks Speech Recognition do comparable work on speech to text; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded.1 of 6 capabilitiesShared product typeComparePPlayAIPrivateText to Speech and Play.ht do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either.1 of 6 capabilitiesShared product typeCompareEElevenLabsPrivate · $11BText to Speech and ElevenLabs Text to Speech do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.4 of 6 capabilitiesShared product typeCompareHCHuawei CloudPrivateOn-Device Speech to Text and Short Sentence Recognition do comparable work on speech to text; both also serve buyers who need to turn speech into text; scale not recorded for either.2 of 6 capabilitiesShared product typeCompareYYandexPublicVoice Agent API and Yandex SpeechKit do comparable work on speech to text, text to speech and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; scale not recorded for either.5 of 6 capabilitiesShared product typeCompareTTwilioPublic · $36.5BVoice Agent API and Conversation Relay do comparable work on speech to text, text to speech and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded.5 of 6 capabilitiesShared product typeCompareTTencentPublic · $510.1BText to Speech and Tencent Cloud TTS do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.3 of 6 capabilitiesShared product typeCompareIIBMPublic · $216.6BText to Speech and IBM Watson Text to Speech do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.4 of 6 capabilitiesShared product typeCompareAAmazonPublic · $2.8TText to Speech and Amazon Polly do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.5 of 6 capabilitiesShared product typeCompareWFWispr FlowPrivate · $2BSummarization and Wispr Flow Notetaker do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareSASarvam AIPrivate · $275M raisedText to Speech and Sarvam Text to Speech do comparable work on text to speech; Speechmatics's scale not recorded.4 of 6 capabilitiesShared product typeCompareOOraclePublic · $454.4BVoice Agent API and OCI Speech do comparable work on speech to text and text to speech; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded.5 of 6 capabilitiesShared product typeCompareRRespeecherPrivate · $4M raisedText to Speech and Respeecher Text-to-Speech API do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.2 of 6 capabilitiesShared product typeCompareMAMistral AIPrivate · $13.8BVoice Agent API and Mistral Speech do comparable work on speech to text, text to speech and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded.4 of 6 capabilitiesShared product typeCompareWLWellSaid LabsPrivateText to Speech and WellSaid Labs voice platform do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either; ships application rather than the same layer.1 of 6 capabilitiesDifferent layerCompareAAlphabet (Google)Public · $4.2TText to Speech and Cloud Text-to-Speech do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.6 of 6 capabilitiesShared product typeCompareXxAIAcquired ($230B deal)Voice Agent API and Grok Voice do comparable work on speech to text, text to speech and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded; xAI is acquired, with no independent scale.4 of 6 capabilitiesShared product typeCompareZZoomPublic · $28.7BSummarization and Zoom Scribe API do comparable work on speech to text; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded.6 of 6 capabilitiesShared product typeCompareBBridgeMindPrivateOn-Device Speech to Text and BridgeVoice do comparable work on speech to text; both also serve buyers who need to turn speech into text; scale not recorded for either; ships agent platform and application rather than the same layer.1 of 6 capabilitiesDifferent layerCompareDDeepLPrivate · $2BTranslation and DeepL Voice for Meetings do comparable work on speech to text and translation; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships application and model API rather than the same layer.3 of 6 capabilitiesDifferent layerCompareGGranolaPrivate · $1.5BSummarization and Granola do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareCCerencePublic · $384.9MVoice Agent API and Cerence Voice Lab do comparable work on speech to text and text to speech; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded.3 of 6 capabilitiesShared product typeCompareLLinagoraPrivateSummarization and LinTO do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; scale not recorded for either; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareMMicrosoftPublic · $3.7TVoice Agent API and Azure Speech in Foundry Tools do comparable work on speech to text and text to speech; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded.5 of 6 capabilitiesShared product typeCompareGGensparkPrivate · $645M raisedOn-Device Speech to Text and Speakly do comparable work on speech to text; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded.2 of 6 capabilitiesShared product typeCompareFRFurhat RoboticsPrivateVoice Agent API and Furhat robot do comparable work on speech to text, text to speech and voice agent; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either; ships platform and robot rather than the same layer.3 of 6 capabilitiesDifferent layerCompareRRunPodPrivateText to Speech and Public Endpoints do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; scale not recorded for either.1 of 6 capabilitiesShared product typeCompareAAbridgePrivate · $5.3BSummarization and Abridge do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareSStepFunPrivate · $10BVoice Agent API and 阶跃星辰 AI Studio (StepFun AI Studio) do comparable work on speech to text, text to speech and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded.3 of 6 capabilitiesShared product typeCompareFFathomAcquiredSummarization and Fathom do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; Fathom is acquired, with no independent scale; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareSSpeakPrivate · $162M raisedVoice Agent API and Speak do comparable work on speech to text and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareRRingCentralPublic · $2.3BSummarization and AI Conversation Expert (ACE) do comparable work on speech to text and summarization; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareSESamsung ElectronicsPublic · $1.2TVoice Agent API and Bixby do comparable work on speech to text and voice agent; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded; ships application, hardware and 1 more rather than the same layer.3 of 6 capabilitiesDifferent layerCompareHHeyGenPrivate · $500MText to Speech and HeyGen Video Translator do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.2 of 6 capabilitiesShared product typeCompareNNiCEPublic · $6.5BSummarization and CXone do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships AI agent, agent platform and 2 more rather than the same layer.4 of 6 capabilitiesDifferent layerCompareKKrispPrivateOn-Device Speech to Text and Krisp Voice Isolation SDK do comparable work on speech to text; scale not recorded for either.4 of 6 capabilitiesShared product typeCompareCCiscoPublic · $433.3BSpeech to Text API and AI Assistant for Webex Contact Center do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships AI agent, application and 1 more rather than the same layer.4 of 6 capabilitiesDifferent layerCompareDDuolingoPublic · $7.3BOn-Device Speech to Text and Duolingo English Test do comparable work on speech to text; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareTTolokaPrivateSpeech to Text API and Tendem do comparable work on translation; scale not recorded for either; ships AI agent, data service and 1 more rather than the same layer.2 of 6 capabilitiesDifferent layerCompareVSVerint SystemsAcquiredSummarization and Verint Da Vinci AI and Bots do comparable work on speech to text and summarization; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; Verint Systems is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.3 of 6 capabilitiesDifferent layerCompareOOpenAIPrivate · $852BVoice Agent API and OpenAI API do comparable work on speech to text and text to speech; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded; ships AI agent, agent platform and 2 more rather than the same layer.4 of 6 capabilitiesDifferent layerCompareKKakaoPublic · $16BVoice Agent API and Kanana do comparable work on speech to text and text to speech; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded; ships agent platform and application rather than the same layer.3 of 6 capabilitiesDifferent layerCompareGGenesysPrivateSpeech to Text API and Conversational Intelligence do comparable work on speech to text; both also serve buyers who need to turn speech into text; scale not recorded for either; ships AI agent, agent platform and 3 more rather than the same layer.5 of 6 capabilitiesDifferent layerCompareOOtter.aiPrivateOn-Device Speech to Text and OtterPilot do comparable work on speech to text; both also serve buyers who need to turn speech into text; scale not recorded for either; ships AI agent and application rather than the same layer.1 of 6 capabilitiesDifferent layerCompareNNotionPrivate · $11BOn-Device Speech to Text and Notion AI Meeting Notes do comparable work on speech to text; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded; ships AI agent and application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareKHKakao HealthcarePrivateSpeech to Text API and PASTA do comparable work on speech to text; both also serve buyers who need to turn speech into text; scale not recorded for either; ships application and data service rather than the same layer.2 of 6 capabilitiesDifferent layerCompareMMiniMaxPublic · $12.6BText to Speech and MiniMax Audio do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded; ships AI agent, application and 1 more rather than the same layer.1 of 6 capabilitiesDifferent layerCompareAAdobePublic · $115.9BVoice Agent API and Adobe Podcast do comparable work on speech to text; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Speechmatics's scale not recorded.3 of 6 capabilitiesShared product typeCompareAHAmbience HealthcarePrivate · $1.3BSummarization and Ambience do comparable work on speech to text and summarization; Speechmatics's scale not recorded; ships application rather than the same layer.2 of 6 capabilitiesDifferent layerCompareSSmartsheetPrivate · $8.4BSpeech to Text API and Smartsheet AI do comparable work on summarization and translation; Speechmatics's scale not recorded; ships application rather than the same layer.3 of 6 capabilitiesDifferent layerCompareUUnbabelAcquired ($91.2M deal)Translation and Unbabel MT Score do comparable work on translation; Speechmatics's scale not recorded; Unbabel is acquired, with no independent scale; ships application, model API and 1 more rather than the same layer.1 of 6 capabilitiesDifferent layerCompareNNVIDIAPublic · $5.1TVoice Agent API and NVIDIA Riva do comparable work on speech to text and text to speech; Speechmatics's scale not recorded; ships hardware, infrastructure service and 2 more rather than the same layer.4 of 6 capabilitiesDifferent layerCompareFFreshworksPublic · $3.4BSpeech to Text API and Freddy AI Insights do comparable work on summarization; Speechmatics's scale not recorded.3 of 6 capabilitiesShared product typeCompareAAlibabaPublic · $273.4BTranslation and Alibaba Cloud Machine Translation do comparable work on translation; Speechmatics's scale not recorded.2 of 6 capabilitiesShared product typeCompareSSynthesiaPrivate · $4BText to Speech and Synthesia do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded; ships application rather than the same layer.1 of 6 capabilitiesDifferent layerCompareSServiceNowPublic · $130.1BVoice Agent API and AI Agents do comparable work on voice agent; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.2 of 6 capabilitiesShared product typeCompareSASoundHound AIPublic · $3.1BVoice Agent API and OASYS do comparable work on voice agent; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.1 of 6 capabilitiesDifferent layerCompareAAAleph AlphaPrivate · $500M raisedSpeech to Text API and PhariaAI do comparable work on summarization and translation; Speechmatics's scale not recorded; ships model API and platform rather than the same layer.2 of 6 capabilitiesDifferent layerCompareSSierraPrivate · $15.8BVoice Agent API and Sierra do comparable work on voice agent; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded.2 of 6 capabilitiesShared product typeCompareFForethoughtPrivate · $115M raisedVoice Agent API and Forethought Solve do comparable work on voice agent; both also serve buyers who need to create synthetic voice and audio; Speechmatics's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.2 of 6 capabilitiesDifferent layerCompareAApplePublic · $4.6TSpeech to Text API and Apple Intelligence do comparable work on summarization and translation; Speechmatics's scale not recorded.3 of 6 capabilitiesShared product typeCompareRSRosetta StoneAcquiredOn-Device Speech to Text and Rosetta Stone Sapphire do comparable work on speech to text; Speechmatics's scale not recorded; Rosetta Stone is acquired, with no independent scale; ships application rather than the same layer.1 of 6 capabilitiesDifferent layerCompareKKuaishouPublic · $18.6BOn-Device Speech to Text and CyberCut do comparable work on speech to text; both also serve buyers who need to turn speech into text; Speechmatics's scale not recorded.1 of 6 capabilitiesShared product typeCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Total funding

Not found · 23 Sep 2026

Two rounds are public and the company states no total: a GBP 6.35M Series A (2019) and a USD 62M Series B led by Susquehanna Growth Equity (own newsroom, 2022-06-28: "has raised $62m in Series B funding"). Summing a sterling and a dollar round would need an fx_rate/fx_date pair; left null.

Valuation

Checked — none published

No valuation published.

Employees

Not found · 4 Sep 2026

The infobox gives a RANGE, "100-250", not a number. A range cannot be stored in this field and picking a point inside it would invent precision the source does not have.

Founded

Wikipedia · 4 Sep 2026

Infobox: founded 2006; industry speech recognition.

Revenue

Checked — none published

Private; no revenue published.

Description

Official documentation · 23 Sep 2026

"A speech-to-text API with three ways to deploy it: cloud, on-prem, or on-device." The earlier clause about defence work was UNPROVEN -- no Speechmatics page read mentions defence -- and was removed.

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