Microsoft Copilot vs Retell AI

A side-by-side comparison of features, pricing, and characteristics.

Microsoft Copilot

Microsoft Copilot is an AI-powered assistant designed to inform, entertain, and inspire users through natural conversation.

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Retell AI

Retell AI is a voice-first conversational AI platform enabling human-quality, low-latency phone calls at scale.

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AttributeMicrosoft CopilotRetell AI
Pricing typeFree + paid (from $20/mo)Free + paid (from $0.13/mo)
Korean supportOfficialNo
PlatformsWeb, Windows, macOS, iOS, AndroidWeb, API, Telephony, SIP, Twilio
Open sourceNoNo
API availableAvailable-
SDKAvailable-
LLM-basedYesYes
MultimodalYesYes
AI model--
GitHub Stars--
VendorMicrosoftRetell AI
CategoryCommunicationCommunication
DetailsView View

Microsoft Copilot key features

  • Conversational AI responses
  • Web search integration
  • DALL-E 3 image generation

Retell AI key features

  • ~600ms low-latency voice orchestration
  • Simulation testing and continuous QA
  • SIP trunking and branded call ID
  • Performance analytics dashboard
  • Proprietary turn-taking model