C

Cartesia

Application

Sells AI voice-generation models (Sonic text-to-speech, Ink speech-to-text) via API for developers and enterprises building voice agents.

Total funding—

Valuation—

Employees—

Founded—

HeadquartersSan Francisco, USA

StatusPrivate

Product

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

• Sonic / Ink API service

  Sonic (text-to-speech) and Ink (speech-to-text) are Cartesia's voice-generation models, sold via API to developers and enterprises building voice agents.

Closest alternatives 4

DDeepgramPrivate · $1.3B2 of 2 capabilitiesShared product typeSourced competitorTurn speech into textCompareEElevenLabsPrivate · $11B2 of 2 capabilitiesShared product typeSourced competitorCreate synthetic voice and audioCompareHAHume AIPrivate1 of 2 capabilitiesShared product typeSourced competitorCreate synthetic voice and audioCompareRAResemble AIPrivate2 of 2 capabilitiesShared product typeSourced competitorCreate synthetic voice and audioCompare

Similar products 67

How this list is ranked ↗

SSpeechmaticsPrivateSonic / Ink and Voice Agent 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; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareOOraclePublic · $454.4BSonic / Ink 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; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeComparePPlayAIPrivateSonic / Ink 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 2 capabilitiesShared product typeCompareTTwilioPublic · $36.5BSonic / Ink and Conversation Relay 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; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareYYandexPublicSonic / Ink and Yandex SpeechKit 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 2 capabilitiesShared product typeCompareCCerencePublic · $384.9MSonic / Ink 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; Cartesia's scale not recorded; ships AI agent, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareMMicrosoftPublic · $3.7TSonic / Ink 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; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareRRespeecherPrivate · $4M raisedSonic / Ink 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; Cartesia's scale not recorded.1 of 2 capabilitiesShared product typeCompareWLWellSaid LabsPrivateSonic / Ink 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 2 capabilitiesDifferent layerCompareFRFurhat RoboticsPrivateSonic / Ink and Furhat robot do comparable work on speech to text and text to speech; 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.2 of 2 capabilitiesDifferent layerCompareIIBMPublic · $216.6BSonic / Ink 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; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareAAmazonPublic · $2.8TSonic / Ink and Amazon Polly do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareAAssemblyAIPrivate · $115M raisedSonic / Ink and AssemblyAI Universal Speech-to-Text API do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded.1 of 2 capabilitiesShared product typeCompareDDeepLPrivate · $2BSonic / Ink and DeepL Voice for Meetings do comparable work on speech to text and text to speech; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships application and model API rather than the same layer.2 of 2 capabilitiesDifferent layerCompareSSpeakPrivate · $162M raisedSonic / Ink and Speak do comparable work on speech to text; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareBBridgeMindPrivateSonic / Ink 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 2 capabilitiesDifferent layerCompareZZoomPublic · $28.7BSonic / Ink and Zoom Scribe API do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareWFWispr FlowPrivate · $2BSonic / Ink and Wispr Flow Dictation do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareKKakaoPublic · $16BSonic / Ink 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; Cartesia's scale not recorded; ships agent platform and application rather than the same layer.2 of 2 capabilitiesDifferent layerCompareHHeyGenPrivate · $500MSonic / Ink and HeyGen Video Translator do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded.1 of 2 capabilitiesShared product typeCompareKKrispPrivateSonic / Ink and Krisp do comparable work on speech to text; both also serve buyers who need to create synthetic voice and audio and turn speech into text; scale not recorded for either; ships application and developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareMAMistral AIPrivate · $13.8BSonic / Ink and Mistral 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; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareNCNAVER CloudPrivateSonic / Ink 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.2 of 2 capabilitiesShared product typeCompareSASarvam AIPrivate · $275M raisedSonic / Ink and Sarvam Text to Speech do comparable work on text to speech; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareXxAIAcquired ($230B deal)Sonic / Ink and Grok Voice 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; Cartesia's scale not recorded; xAI is acquired, with no independent scale.2 of 2 capabilitiesShared product typeCompareAAdobePublic · $115.9BSonic / Ink 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; Cartesia's scale not recorded.1 of 2 capabilitiesShared product typeCompareGGensparkPrivate · $645M raisedSonic / Ink and Speakly do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships AI agent, application and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareGGranolaPrivate · $1.5BSonic / Ink and Granola do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareLLinagoraPrivateSonic / Ink and LinTO 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 rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAbridgePrivate · $5.3BSonic / Ink and Abridge do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareFFathomAcquiredSonic / Ink and Fathom do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; Fathom is acquired, with no independent scale; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareOOtter.aiPrivateSonic / Ink 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 2 capabilitiesDifferent layerCompareDDuolingoPublic · $7.3BSonic / Ink and Duolingo English Test do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareSStepFunPrivate · $10BSonic / Ink and 阶跃星辰 AI Studio (StepFun AI Studio) 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; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareFAFireworks AIPrivate · $17.5BSonic / Ink and Fireworks Speech Recognition do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded.1 of 2 capabilitiesShared product typeCompareSSynthesiaPrivate · $4BSonic / Ink and Synthesia do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareKHKakao HealthcarePrivateSonic / Ink 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.1 of 2 capabilitiesDifferent layerCompareNNotionPrivate · $11BSonic / Ink and Notion AI Meeting Notes do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships AI agent and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareGGenesysPrivateSonic / Ink 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.1 of 2 capabilitiesDifferent layerCompareNNiCEPublic · $6.5BSonic / Ink and CXone do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships AI agent, agent platform and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareTTencentPublic · $510.1BSonic / Ink and Tencent Cloud TTS do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareVSVerint SystemsAcquiredSonic / Ink and Verint Da Vinci AI and Bots do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; Verint Systems is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRRingCentralPublic · $2.3BSonic / Ink and AI Conversation Expert (ACE) do comparable work on speech to text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRSRosetta StoneAcquiredSonic / Ink and Rosetta Stone Sapphire do comparable work on speech to text; Cartesia's scale not recorded; Rosetta Stone is acquired, with no independent scale; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAlphabet (Google)Public · $4.2TSonic / Ink and Cloud Text-to-Speech do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded.2 of 2 capabilitiesShared product typeCompareSASoundHound AIPublic · $3.1BSonic / Ink and OASYS both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.Different layerCompareAHAmbience HealthcarePrivate · $1.3BSonic / Ink and Ambience do comparable work on speech to text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareOOpenAIPrivate · $852BSonic / Ink 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; Cartesia's scale not recorded; ships AI agent, agent platform and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareHCHuawei CloudPrivateSonic / Ink 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.1 of 2 capabilitiesShared product typeCompareFFirefliesPrivateSonic / Ink and Fireflies.ai meeting assistant do comparable work on speech to text; scale not recorded for either; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareXXiao-iPublicSonic / Ink and Xiao-i cognitive intelligence platform both serve buyers who need to create synthetic voice and audio; scale not recorded for either; ships application and platform rather than the same layer.Different layerCompareFForethoughtPrivate · $115M raisedSonic / Ink and Forethought Solve both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.Different layerCompareSServiceNowPublic · $130.1BSonic / Ink and ServiceNow Otto both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent, application and 2 more rather than the same layer.Different layerCompareLLivePersonAcquiredSonic / Ink and Conversational Cloud both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; LivePerson is acquired, with no independent scale; ships AI agent, agent platform and 1 more rather than the same layer.Different layerCompareCCognigyAcquiredSonic / Ink and Cognigy.AI both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; Cognigy is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.Different layerCompareDDecagonPrivate · $4.5BSonic / Ink and Decagon both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.Different layerCompareSSierraPrivate · $15.8BSonic / Ink and Sierra both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent, application and 1 more rather than the same layer.Different layerCompareEEliseAIPrivate · $384M raisedSonic / Ink and EliseAI both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent and application rather than the same layer.Different layerCompareZZendeskPrivate · $10.2BSonic / Ink and Zendesk Contact Center both serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent and application rather than the same layer.Different layerCompareYYellow.aiPrivateSonic / Ink and Yellow.ai Agentic AI Platform both serve buyers who need to create synthetic voice and audio; scale not recorded for either; ships AI agent, agent platform and 2 more rather than the same layer.Different layerCompareCCaptionsPrivate · $500MSonic / Ink and Captions do comparable work on speech to text; Cartesia's scale not recorded; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareUUniphorePrivate · $2.5BSonic / Ink and Self-Service Agent do comparable work on speech to text; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Cartesia's scale not recorded; ships application, data service and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareNNVIDIAPublic · $5.1TSonic / Ink and NVIDIA Riva do comparable work on speech to text and text to speech; Cartesia's scale not recorded; ships hardware, infrastructure service and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareSESamsung ElectronicsPublic · $1.2TSonic / Ink and Bixby do comparable work on speech to text; both also serve buyers who need to create synthetic voice and audio and turn speech into text; Cartesia's scale not recorded; ships application, hardware and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareMMiniMaxPublic · $12.6BSonic / Ink and MiniMax Audio do comparable work on text to speech; both also serve buyers who need to create synthetic voice and audio; Cartesia's scale not recorded; ships AI agent, application and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRRunPodPrivateSonic / Ink 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; ships developer tool, infrastructure service and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareCCiscoPublic · $433.3BSonic / Ink and AI Assistant for Webex Contact Center do comparable work on speech to text; both also serve buyers who need to turn speech into text; Cartesia's scale not recorded; ships AI agent, application and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare

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

Founded

Not found · 20 Sep 2026

No founding year on Cartesia's own pages: /company, /careers, /blog/sonic, /legal/privacy, /legal/terms all read 2026-09-20; a site-scoped search returned no founding statement.

Public listing

Company disclosure · 19 Sep 2026

Self-described as a funded startup; no public filing found.

Description

Company disclosure · 19 Sep 2026

Open Cartesia in the directory

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