C

CallSphere

CallSphere designs, integrates, and deploys AI voice and chat agents for businesses to handle customer support and automate workflows.

StageUndisclosed

Founded2024

HeadquartersSan Francisco, USA

StatusPrivate

Product

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

• AI Voice & Chat Agents AI agent Sold on its own

  CallSphere's AI Voice & Chat Agents answer calls and chats, resolve customer requests, and execute connected business workflows.

Similar products 150

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

GLGradient LabsEarly-stageAI Voice & Chat Agents and Lending agent do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareLLorikeetEarly-stageAI Voice & Chat Agents and Concierge do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareMAMaven AGIEarly-stageAI Voice & Chat Agents and AI Agents do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareTTwigUndisclosedAI Voice & Chat Agents and Sera do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareBBernardUndisclosedAI Voice & Chat Agents and Bernard do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareRRinglyUndisclosedAI Voice & Chat Agents and Seth do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareEEchoCallUndisclosedAI Voice & Chat Agents and AI Voice Agent do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareRRegalEarly-stageAI Voice & Chat Agents and Phone AI Agents do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareFFiniEarly-stageAI Voice & Chat Agents and Fini AI agent do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareRRevionUndisclosedAI Voice & Chat Agents and Revion AI voice agents do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareFfonio.aiUndisclosedAI Voice & Chat Agents and AI Phone Assistant do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareDDaptaEarly-stageAI Voice & Chat Agents and AI Voice Agent do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareHAHippocratic AILate-stageAI Voice & Chat Agents and AI Physician Front Door do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeComparePPhonelyEarly-stageAI Voice & Chat Agents and Phonely do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.3 of 3 capabilitiesDifferent layerCompareAHAssort HealthLate-stageAI Voice & Chat Agents and Assort Concierge do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareSASoundHound AIPublicAI Voice & Chat Agents and OASYS Front Desk do comparable work on customer support and voice agent; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeComparePPolyAIUndisclosedAI Voice & Chat Agents and PolyAI dialog agents do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeComparePPhonicUndisclosedAI Voice & Chat Agents and Phonic do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.3 of 3 capabilitiesDifferent layerCompareSASimple AIEarly-stageAI Voice & Chat Agents and Simple AI do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareFForethoughtAcquiredAI Voice & Chat Agents and Forethought Solve do comparable work on customer support and voice agent; CallSphere's scale not recorded; Forethought is acquired, with no independent scale.3 of 3 capabilitiesShared product typeCompareTtelliEarly-stageAI Voice & Chat Agents and telli do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.3 of 3 capabilitiesDifferent layerCompareAAideUndisclosedAI Voice & Chat Agents and Aide AI Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareAAAlhena AIEarly-stageAI Voice & Chat Agents and AI Support Concierge both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCACoSupport AIUndisclosedAI Voice & Chat Agents and CoSupport AI Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareNNeopleUndisclosedAI Voice & Chat Agents and Neople both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeComparePPylonEarly-stageAI Voice & Chat Agents and Support Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareSASiena AIEarly-stageAI Voice & Chat Agents and Customer Service Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareYAYuma AIEarly-stageAI Voice & Chat Agents and Support AI both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareHHaptikAcquiredAI Voice & Chat Agents and AI Booking Agent do comparable work on customer support and voice agent; CallSphere's scale not recorded; Haptik is acquired, with no independent scale.3 of 3 capabilitiesShared product typeCompareLLivePersonAcquiredAI Voice & Chat Agents and LivePerson Voice AI do comparable work on customer support and voice agent; CallSphere's scale not recorded; LivePerson is acquired, with no independent scale.3 of 3 capabilitiesShared product typeCompareOOneInboxUndisclosedAI Voice & Chat Agents and OneInbox do comparable work on customer support and voice agent; scale not recorded for either; ships application rather than the same layer.2 of 3 capabilitiesDifferent layerCompareEEvergroveUndisclosedAI Voice & Chat Agents and Evergrove both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareTThenaUndisclosedAI Voice & Chat Agents and Thena AI agents both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareDDecagonLate-stageAI Voice & Chat Agents and Decagon do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareSServiceNowPublicAI Voice & Chat Agents and AI Agents do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareFFinAcquiredAI Voice & Chat Agents and Fin Voice do comparable work on customer support and voice agent; CallSphere's scale not recorded; Fin is acquired, with no independent scale.3 of 3 capabilitiesShared product typeCompareSSynthflowEarly-stageAI Voice & Chat Agents and Synthflow Voice AI Agents do comparable work on customer support and voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCCrescendoEarly-stageAI Voice & Chat Agents and Crescendo Concierge do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeComparePParloaLate-stageAI Voice & Chat Agents and Parloa AMP do comparable work on customer support and voice agent; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareEEliseAILate-stageAI Voice & Chat Agents and EliseAI do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareGGenesysUndisclosedAI Voice & Chat Agents and Genesys Cloud CX do comparable work on customer support and voice agent; CallSphere's scale not recorded; Genesys's scale not comparable: only a revenue estimate, no market cap or valuation.3 of 3 capabilitiesShared product typeCompareSSalesforcePublicAI Voice & Chat Agents and Casey, the Help Agent do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareFLFunnel LeasingUndisclosedAI Voice & Chat Agents and Fenix do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareFFreshworksPublicAI Voice & Chat Agents and Freshcaller do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareCCrestaLate-stageAI Voice & Chat Agents and Cresta AI Agent do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareUUnthreadUndisclosedAI Voice & Chat Agents and Agentic AI both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareEeGainPublicAI Voice & Chat Agents and eGain AI Agent do comparable work on customer support and voice agent; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareYYellow.aiUndisclosedAI Voice & Chat Agents and Conversational EX Cloud both list customer support; scale not recorded for either.3 of 3 capabilitiesShared product typeCompareQQueryPalUndisclosedAI Voice & Chat Agents and QueryPal Concierge both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareEAeesel AIUndisclosedAI Voice & Chat Agents and AI customer service agent both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareZZoomPublicAI Voice & Chat Agents and Zoom Virtual Agent Receptionist do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareEEliteUndisclosedAI Voice & Chat Agents and Elite Health both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareRRoundedUndisclosedAI Voice & Chat Agents and Donna both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareTTrilletUndisclosedAI Voice & Chat Agents and Trillet Voice do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.3 of 3 capabilitiesDifferent layerComparePParahelpEarly-stageAI Voice & Chat Agents and Support Agent both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareCACallbook AIUndisclosedAI Voice & Chat Agents and Callbook AI both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareLLunaBillUndisclosedAI Voice & Chat Agents and LunaBill both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareKKore.aiLate-stageAI Voice & Chat Agents and AI for Service do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform and application rather than the same layer.3 of 3 capabilitiesDifferent layerCompareLLimeChatEarly-stageAI Voice & Chat Agents and Level 3 AI both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareCCognigyAcquiredAI Voice & Chat Agents and Cognigy Voice Gateway do comparable work on customer support and voice agent; CallSphere's scale not recorded; Cognigy is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareNNiCEPublicAI Voice & Chat Agents and AI Agents for Proactive Engagement do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareRARetell AIUndisclosedAI Voice & Chat Agents and Retell AI Voice Agents do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareZZendeskLate-stageAI Voice & Chat Agents and Employee Service AI Agents both list customer support; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeComparePPalisadeUndisclosedAI Voice & Chat Agents and Palisade both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareAAskHandleUndisclosedAI Voice & Chat Agents and AskHandle both list customer support; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareAAtlassianPublicAI Voice & Chat Agents and Service Request Helper both list customer support; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareAAdaUndisclosedAI Voice & Chat Agents and Ada AI Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareKKapaUndisclosedAI Voice & Chat Agents and Kapa Website Agent both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareHHerodeskUndisclosedAI Voice & Chat Agents and Herodesk AI agents both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCClearFeedEarly-stageAI Voice & Chat Agents and ClearFeed AI Agents both list customer support; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareKKlaviyoPublicAI Voice & Chat Agents and Klaviyo Customer Agent both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareSSierraLate-stageAI Voice & Chat Agents and Channels do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareLALeaping AIUndisclosedAI Voice & Chat Agents and Inbound Voice AI both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareTThoughtlyUndisclosedAI Voice & Chat Agents and Revenue Autopilot both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareEEntrataUndisclosedAI Voice & Chat Agents and Entrata Maintenance AI both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareHHaladirUndisclosedAI Voice & Chat Agents and Haladir Nomos and Talon both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareBBliroUndisclosedAI Voice & Chat Agents and Vicky & Tim both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareZZmodeUndisclosedAI Voice & Chat Agents and ZMODE both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCConversicaUndisclosedAI Voice & Chat Agents and Conversica AI Agents both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareFFive9PublicAI Voice & Chat Agents and Five9 Genius AI do comparable work on customer support and voice agent; CallSphere's scale not recorded; ships agent platform, application and 2 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareOOraclePublicAI Voice & Chat Agents and Oracle Digital Assistant do comparable work on customer support and voice agent; CallSphere's scale not recorded; ships API service, agent platform and 6 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareAAptenUndisclosedAI Voice & Chat Agents and Apten both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareAAArrowhead AIUndisclosedAI Voice & Chat Agents and Arrowhead AI both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareDDeryaUndisclosedAI Voice & Chat Agents and Derya both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareCCarSignalUndisclosedAI Voice & Chat Agents and CarSignal both list voice agent; scale not recorded for either; ships application rather than the same layer.2 of 3 capabilitiesDifferent layerCompareAAmazonPublicAI Voice & Chat Agents and Amazon Connect Customer do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareBBolnaEarly-stageAI Voice & Chat Agents and Bolna AI voice agents do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareTTwilioPublicAI Voice & Chat Agents and Twilio Agent Connect do comparable work on customer support and voice agent; CallSphere's scale not recorded; ships API service, application and 3 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareKVKindred VoiceUndisclosedAI Voice & Chat Agents and Kindred Voice both list voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareOOmniDimensionUndisclosedAI Voice & Chat Agents and OmniDimension both list voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareIInkeepEarly-stageAI Voice & Chat Agents and AI Workflows both list customer support; scale not recorded for either; ships application rather than the same layer.2 of 3 capabilitiesDifferent layerCompareBABland AIEarly-stageAI Voice & Chat Agents and Bland do comparable work on customer support and voice agent; scale not recorded for either; ships API service and agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareHHubSpotPublicAI Voice & Chat Agents and Customer Agent both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareAAllooviumUndisclosedAI Voice & Chat Agents and Alloovium both list voice agent; scale not recorded for either; ships application rather than the same layer.2 of 3 capabilitiesDifferent layerCompareXXiao-iPublicAI Voice & Chat Agents and Xiao-i cognitive intelligence platform do comparable work on customer support and voice agent; CallSphere'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 layerCompareWWorkdayPublicAI Voice & Chat Agents and Workday Paradox Candidate Experience both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareBBraviUndisclosedAI Voice & Chat Agents and Bravi both list customer support; scale not recorded for either; ships application rather than the same layer.2 of 3 capabilitiesDifferent layerCompareCChatbaseUndisclosedAI Voice & Chat Agents and Chatbase both list customer support; scale not recorded for either; ships agent platform rather than the same layer.1 of 3 capabilitiesDifferent layerCompareAAwaz.aiUndisclosedAI Voice & Chat Agents and Awaz.ai both list voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareSScreenedUndisclosedAI Voice & Chat Agents and Ryan both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareAAlvariaUndisclosedAI Voice & Chat Agents and Alvaria Intelligence Platform (AIP) both list customer support; scale not recorded for either; ships platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareAAdobePublicAI Voice & Chat Agents and Product Support Agent both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareSShopifyPublicAI Voice & Chat Agents and Shopify Inbox both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareEElevenLabsLate-stageAI Voice & Chat Agents and ElevenAgents do comparable work on customer support and voice agent; CallSphere's scale not recorded; ships API service, agent platform and 1 more rather than the same layer.3 of 3 capabilitiesDifferent layerComparePProxUndisclosedAI Voice & Chat Agents and Prox both list customer support; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareAAutocallsUndisclosedAI Voice & Chat Agents and Autocalls.ai both list voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 3 capabilitiesDifferent layerCompareEEvenUpLate-stageAI Voice & Chat Agents and EvenUp Communication Agents both list voice agent; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareMmonday.comPublicAI Voice & Chat Agents and monday service both list customer support; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareRRasaEarly-stageAI Voice & Chat Agents and Rasa Platform do comparable work on customer support and voice agent; scale not recorded for either; ships agent platform, application and 1 more rather than the same layer.2 of 3 capabilitiesDifferent layerCompareRRibbonEarly-stageAI Voice & Chat Agents and Ribbon AI Interviewer both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareMMicrosoftPublicAI Voice & Chat Agents and Service Agent both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareKHK HealthLate-stageAI Voice & Chat Agents and PatientGPT both list customer support; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareMMakiUndisclosedAI Voice & Chat Agents and Mochi both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareIIBMPublicAI Voice & Chat Agents and IBM Watson Assistant do comparable work on customer support and voice agent; CallSphere's scale not recorded; ships API service, agent platform and 4 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareAAlexEarly-stageAI Voice & Chat Agents and AI Interviewer both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeComparePPlutoUndisclosedAI Voice & Chat Agents and Pluto both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeComparePPegasystemsPublicAI Voice & Chat Agents and Pega Customer Service both list customer support; CallSphere's scale not recorded; ships agent platform, application and 2 more rather than the same layer.2 of 3 capabilitiesDifferent layerCompareBBrightHireEarly-stageAI Voice & Chat Agents and BrightHire Screen both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeComparePPhenomLate-stageAI Voice & Chat Agents and Voice Screening Agent both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareCCartesiaEarly-stageAI Voice & Chat Agents and Managed Agents both list voice agent; scale not recorded for either; ships API service and agent platform rather than the same layer.1 of 3 capabilitiesDifferent layerCompareLLListen LabsLate-stageAI Voice & Chat Agents and Listen both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareCCerencePublicAI Voice & Chat Agents and Dealer Assist Agent both list voice agent; CallSphere's scale not recorded.1 of 3 capabilitiesShared product typeCompareKKrispUndisclosedAI Voice & Chat Agents and Krisp Call Center AI both list customer support; scale not recorded for either; ships API service, application and 1 more rather than the same layer.1 of 3 capabilitiesDifferent layerCompareASAI ScreenrUndisclosedAI Voice & Chat Agents and AI Screenr both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareSSona8UndisclosedAI Voice & Chat Agents and Sona8 both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareAAiseraAcquiredAI Voice & Chat Agents and Aisera AI Agent Platform both list customer support; CallSphere's scale not recorded; Aisera is acquired, with no independent scale; ships agent platform and application rather than the same layer.2 of 3 capabilitiesDifferent layerCompareVSVerint SystemsAcquiredAI Voice & Chat Agents and Verint Copilot Bots both list customer support; CallSphere's scale not recorded; Verint Systems is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.2 of 3 capabilitiesDifferent layerCompareWWhitespaceUndisclosedAI Voice & Chat Agents and Whitespace both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareSSpeakLate-stageAI Voice & Chat Agents and Speak for Business both list voice agent; CallSphere's scale not recorded; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareYYandexPublicAI Voice & Chat Agents and Yandex SpeechSense both list customer support; CallSphere's scale not recorded; ships API service, application and 2 more rather than the same layer.2 of 3 capabilitiesDifferent layerCompareFRFurhat RoboticsUndisclosedAI Voice & Chat Agents and FurhatAI Creator both list voice agent; scale not recorded for either; ships application, platform and 1 more rather than the same layer.1 of 3 capabilitiesDifferent layerCompareCCiscoPublicAI Voice & Chat Agents and Webex AI Agent do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareVVectaraEarly-stageAI Voice & Chat Agents and Customer Support Managed Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompare1111xEarly-stageAI Voice & Chat Agents and Julian both list voice agent; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareALAleph LabUndisclosedAI Voice & Chat Agents and Aleph Kids both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareSCSpanish ChatUndisclosedAI Voice & Chat Agents and Maya both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareRARelevance AIEarly-stageAI Voice & Chat Agents and Suni, the Intercom Agent both list customer support; scale not recorded for either.2 of 3 capabilitiesShared product typeCompareRRespeecherEarly-stageAI Voice & Chat 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 layerCompareDDuolingoPublicAI Voice & Chat Agents and Duolingo Max both list voice agent; CallSphere's scale not recorded; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareTATalkio AIUndisclosedAI Voice & Chat Agents and Talkio AI both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 3 capabilitiesDifferent layerCompareAApplePublicAI Voice & Chat Agents and Siri AI both list voice agent; CallSphere's scale not recorded; ships application and developer tool rather than the same layer.1 of 3 capabilitiesDifferent layerCompareIAInworld AIUndisclosedAI Voice & Chat 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 layerCompareLLATOUndisclosedAI Voice & Chat Agents and LATO both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareUUniphoreLate-stageAI Voice & Chat Agents and Self-Service Agent do comparable work on customer support and voice agent; CallSphere's scale not recorded; ships application, data service and 1 more rather than the same layer.3 of 3 capabilitiesDifferent layerCompareAAlphabet (Google)PublicAI Voice & Chat Agents and Gemini Enterprise for Customer Experience do comparable work on customer support and voice agent; CallSphere's scale not recorded.3 of 3 capabilitiesShared product typeCompareRRingCentralPublicAI Voice & Chat Agents and AI Receptionist both list voice agent; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareMPMeta PlatformsPublicAI Voice & Chat Agents and Meta Business Agent both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareWWixPublicAI Voice & Chat Agents and Wix Smart Chat both list customer support; CallSphere's scale not recorded.2 of 3 capabilitiesShared product typeCompareMManatalUndisclosedAI Voice & Chat Agents and Manatal AI Interviewer both list voice agent; scale not recorded for either.1 of 3 capabilitiesShared product typeCompareCCoveoPublicAI Voice & Chat Agents and Coveo Case Assist both list customer support; scale not recorded for either; ships API service, application and 2 more rather than the same layer.1 of 3 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

Total funding

Not found · 20 Oct 2026

Pages read for this record state no funding total.

Valuation

Not found · 20 Oct 2026

Pages read for this record state no valuation or market capitalisation.

Founded

Company disclosure · 20 Oct 2026

"CallSphere Inc was founded in 2024 by Sagar Shankaran"

Public listing

Not found · 20 Oct 2026

No listing on the pages read; treated as private.

Description

Official documentation · 20 Oct 2026

Company page: "It designs, integrates, and deploys AI voice and chat agents"

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