S

Synthflow

Sells an enterprise voice AI platform on which businesses build agents that answer and make phone calls for customer service, reception and booking, with its own telephony.

StageEarly-stage

Founded2023

HeadquartersBerlin, Germany

StatusPrivate

Products

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

• Synthflow Voice AI Agents Agent platform Sold on its own

  Voice AI platform for building and running phone agents with a visual Flow Designer, built-in telephony, automated testing and call monitoring, sold to enterprises on annual contracts.

Inside Synthflow

• Aurora AI agent Included with the parent

  AI agent inside the Synthflow dashboard that builds and updates voice agents, writes prompts, sets up knowledge bases and actions, analyses past calls and runs test simulations from plain-language requests, applying changes only after confirmation.

Closest alternatives 2

RARetell AIUndisclosedRetell AI's own comparison page positions Retell's voice agents against Synthflow for running phone conversations.3 of 3 capabilitiesShared product typeSourced competitorHandle customer support conversationsCompareBABland AIEarly-stageBland's own comparison page sets Bland against Synthflow as a platform for building voice agents.3 of 3 capabilitiesShared product typeSourced competitorBuild and run AI agentsCompare

Similar products 78

How this list is ranked ↗

PPolyAIUndisclosedSynthflow Voice AI Agents and Dialog Studio do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareSASoundHound AIPublicSynthflow Voice AI Agents and OASYS do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareHHaptikAcquiredSynthflow Voice AI Agents and Contakt both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Haptik is acquired, with no independent scale.3 of 3 capabilitiesShared product typeCompareKKore.aiLate-stageSynthflow Voice AI Agents and AI for Service do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareDDecagonLate-stageSynthflow Voice AI Agents and Decagon do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareCCrescendoEarly-stageSynthflow Voice AI Agents and Crescendo Concierge do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareSSalesforcePublicSynthflow Voice AI Agents and Agentforce Voice do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareYYellow.aiUndisclosedSynthflow Voice AI Agents and Yellow.ai Agentic AI Platform do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareAAdaUndisclosedSynthflow Voice AI Agents and Playbooks both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareSSierraLate-stageSynthflow Voice AI Agents and Channels do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareCCrestaLate-stageSynthflow Voice AI Agents and Cresta AI Agent do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareRRasaEarly-stageSynthflow Voice AI Agents and Rasa Platform do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareHAHippocratic AILate-stageSynthflow Voice AI Agents and AI Physician Front Door do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareGGenesysUndisclosedSynthflow Voice AI Agents and Genesys Cloud AI Studio both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Genesys's scale not comparable: only a revenue estimate, no market cap or valuation.3 of 3 capabilitiesShared product typeCompareCCognigyAcquiredSynthflow Voice AI Agents and Cognigy.AI do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Cognigy is acquired, with no independent scale.3 of 3 capabilitiesShared product typeCompareEeGainPublicSynthflow Voice AI Agents and eGain AI Agent do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareFForethoughtAcquiredSynthflow Voice AI Agents and Forethought Solve do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Forethought is acquired, with no independent scale.2 of 3 capabilitiesShared product typeCompareLLivePersonAcquiredSynthflow Voice AI Agents and Conversational Cloud do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; LivePerson is acquired, with no independent scale.2 of 3 capabilitiesShared product typeCompareNNiCEPublicSynthflow Voice AI Agents and AI Agents for Self-Service do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareSServiceNowPublicSynthflow Voice AI Agents and AI Agents do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareFFive9PublicSynthflow Voice AI Agents and Five9 IVA Studio both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareTTwilioPublicSynthflow Voice AI Agents and Twilio Agent Connect do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; ships API service, application and 3 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareOOraclePublicSynthflow Voice AI Agents and Oracle Digital Assistant do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeComparePParloaLate-stageSynthflow Voice AI Agents and Parloa AMP do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareZZendeskLate-stageSynthflow Voice AI Agents and AI Agents both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareAAiseraAcquiredSynthflow Voice AI Agents and Aisera AI Agent Platform both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Aisera is acquired, with no independent scale.2 of 3 capabilitiesShared product typeCompareCCartesiaEarly-stageSynthflow Voice AI Agents and Managed Agents both list voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareEElevenLabsLate-stageSynthflow Voice AI Agents and ElevenLabs Agents do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareFFreshworksPublicSynthflow Voice AI Agents and Freddy AI Agent Studio both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareFFinAcquiredSynthflow Voice AI Agents and Fin Voice do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Fin is acquired, with no independent scale.2 of 3 capabilitiesShared product typeCompareAHAssort HealthLate-stageSynthflow Voice AI Agents and Assort Concierge do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareAAmazonPublicSynthflow Voice AI Agents and Amazon Connect Customer do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareXXiao-iPublicSynthflow Voice AI Agents and Xiao-i cognitive intelligence platform do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; Xiao-i's scale not comparable: only a revenue estimate, no market cap or valuation; ships application and platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareEEliseAILate-stageSynthflow Voice AI Agents and EliseAI do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareIIBMPublicSynthflow Voice AI Agents and IBM Watson Assistant do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareZZoomPublicSynthflow Voice AI Agents and Zoom Virtual Agent do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareKKlaviyoPublicSynthflow Voice AI Agents and Klaviyo Customer Agent both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.1 of 3 capabilitiesShared product typeCompareEEntrataUndisclosedSynthflow Voice AI Agents and Entrata Leasing AI both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCConversicaUndisclosedSynthflow Voice AI Agents and Conversica AI Agents both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareHHubSpotPublicSynthflow Voice AI Agents and Agent Hub both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareFLFunnel LeasingUndisclosedSynthflow Voice AI Agents and Fenix do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareVSVeeva SystemsPublicSynthflow Voice AI Agents and Veeva Ostro both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareKHK HealthLate-stageSynthflow Voice AI Agents and PatientGPT both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareCCiscoPublicSynthflow Voice AI Agents and Webex AI Agent do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeComparePPegasystemsPublicSynthflow Voice AI Agents and Pega Customer Service both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareMMicrosoftPublicSynthflow Voice AI Agents and Microsoft Copilot Studio both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareKKrispUndisclosedSynthflow Voice AI Agents and Krisp Call Center AI both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either; ships application and developer tool rather than the same layer.1 of 3 capabilitiesDifferent layerCompareAAtlassianPublicSynthflow Voice AI Agents and Customer Service Management do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareVVapiEarly-stageSynthflow Voice AI Agents and Vapi both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCCerencePublicSynthflow Voice AI Agents and Dealer Assist Agent both list voice agent; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareWWorkdayPublicSynthflow Voice AI Agents and Workday Paradox Candidate Experience both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareAAlphabet (Google)PublicSynthflow Voice AI Agents and Customer Experience Agent Studio both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.3 of 3 capabilitiesShared product typeCompareRRibbonEarly-stageSynthflow Voice AI Agents and Ribbon API both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareAAlvariaUndisclosedSynthflow Voice AI Agents and Alvaria Intelligence Platform (AIP) both list customer support; scale not recorded for either; ships platform rather than the same layer.1 of 3 capabilitiesDifferent layerCompareYYandexPublicSynthflow Voice AI Agents and Yandex SpeechSense both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded; ships API service, application and 2 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareLLListen LabsLate-stageSynthflow Voice AI Agents and Listen both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareASAI ScreenrUndisclosedSynthflow Voice AI Agents and AI Screenr both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareSSpeakLate-stageSynthflow Voice AI Agents and Speak for Business both list voice agent; Synthflow's scale not recorded; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareRARelevance AIEarly-stageAurora and Invent both serve buyers who need to test and evaluate an AI agent; same layer and the same scale band (early-stage private).2 of 3 capabilitiesShared product typeSame scale bandCompareCCoveoPublicSynthflow Voice AI Agents and Coveo Case Assist both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either; ships API service, application and 2 more rather than the same layer.2 of 3 capabilitiesDifferent layerCompareFRFurhat RoboticsUndisclosedSynthflow Voice AI Agents and FurhatAI both list voice agent; scale not recorded for either; ships platform and robot rather than the same layer.1 of 3 capabilitiesDifferent layerCompareIAInworld AIUndisclosedSynthflow Voice AI Agents and Realtime API both list voice agent; scale not recorded for either; ships API service, infrastructure service and 2 more rather than the same layer.1 of 3 capabilitiesDifferent layerCompareSCSpanish ChatUndisclosedSynthflow Voice AI Agents and Maya both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareWWixPublicSynthflow Voice AI Agents and Wix Smart Chat both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareRRespeecherEarly-stageSynthflow Voice AI Agents and Respeecher Space both list voice agent; scale not recorded for either; ships API service and application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareAApplePublicSynthflow Voice AI Agents and Siri AI both list voice agent; Synthflow's scale not recorded; ships application and developer tool rather than the same layer.1 of 3 capabilitiesDifferent layerCompareDDuolingoPublicSynthflow Voice AI Agents and Duolingo Max both list voice agent; Synthflow's scale not recorded; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareTTencentPublicSynthflow Voice AI Agents and Tencent Cloud Agent Development Platform both list customer support; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.2 of 3 capabilitiesShared product typeCompareTATalkio AIUndisclosedSynthflow Voice AI Agents and Talkio AI both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareVVectaraEarly-stageSynthflow Voice AI Agents and Customer Support Managed Agent both list customer support; both also serve buyers who need to handle customer support conversations; same layer and the same scale band (early-stage private).2 of 3 capabilitiesShared product typeSame scale bandCompareRRingCentralPublicSynthflow Voice AI Agents and AI Receptionist both list voice agent; both also serve buyers who need to handle customer support conversations; Synthflow's scale not recorded.1 of 3 capabilitiesShared product typeCompareHCH CompanyLate-stageOverlaps on agent orchestration; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareNCNAVER CloudUndisclosedSynthflow Voice AI Agents and CLOVA AiCall do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; scale not recorded for either; ships API service, application and 1 more rather than the same layer.2 of 3 capabilitiesDifferent layerCompareHCHuawei CloudUndisclosedSynthflow Voice AI Agents and Question Answering Bot (QABot) both list customer support; both also serve buyers who need to handle customer support conversations; scale not recorded for either; ships API service, application and 4 more rather than the same layer.1 of 3 capabilitiesDifferent layerCompareWWriterLate-stageOverlaps on agent orchestration; Synthflow's scale not recorded.1 of 3 capabilitiesShared product typeCompareMMicro1UndisclosedAurora and Cortex both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships data service rather than the same layer.Different layerCompareDDeepgramLate-stageSynthflow Voice AI Agents and Deepgram Voice Agent API both list voice agent; Synthflow's scale not recorded; ships API service rather than the same layer.2 of 3 capabilitiesDifferent layerCompareSSynthesiaLate-stageSynthflow Voice AI Agents and Survey Sessions both list voice agent; Synthflow's scale not recorded.1 of 3 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

Stage, from total funding

Company disclosure · 7 Oct 2026

Company page: "$30M Total Funding Raised" (figure undated on the page). Series A release (https://synthflow.ai/news/synthflow-raises-20m-series-a, 2025-06-25): "The round is led by Accel ... This follows the company's seed round last year, bringing the total funding to $30M." USD.

Valuation

Not found · 7 Oct 2026

No valuation is stated on https://synthflow.ai/company, the Series A release or the homepage.

Founded

Company disclosure · 7 Oct 2026

Company page: "Synthflow was founded in Berlin in 2023".

Public listing

Company disclosure · 7 Oct 2026

Private company: a GmbH with a commercial register entry; funded by venture rounds (Series A led by Accel); no public filing.

Description

Company disclosure · 7 Oct 2026

Homepage: "Enterprise-Ready Voice AI Agents for Automated Phone Calls".

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