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Full‑stack UCaaS with voice, video, messaging, and a robust Teams integration that lets users make and receive calls directly from Teams.
#3 Zoom Phone
Cloud‑based phone system with PSTN calling, voicemail, and a certified Teams integration for click‑to‑dial and call handling inside Teams.
Enterprise‑grade calling, meetings, and messaging platform with native Teams Direct Routing support for seamless call routing.
#5 8x8 X Series
Unified voice, video, chat, and contact‑center suite with a Teams integration that enables users to place and receive calls from the Teams UI.
#6 Fuze
All‑in‑one UCaaS offering voice, video, messaging, and a Teams connector for inbound/outbound calling via Teams.
Scalable cloud communications with voice, video, chat, and a certified Teams Direct Routing partnership.
Cloud PBX with voice, video, and collaboration tools plus a Teams integration that lets users manage calls from Teams.
Unified communications suite with voice, video, messaging, and a Teams integration for click‑to‑dial and call control.
#10 Dialpad Talk
AI‑enhanced cloud phone system with voice, video, and a Teams integration that routes calls through Dialpad while using Teams UI.
Business phone service integrated with Google Workspace; can be linked to Teams via third‑party connectors for call handling.
#12 Nextiva
Unified communications platform with voice, video, chat, and a Teams Direct Routing partnership for seamless call experience.
Cloud PBX with voice, video, and messaging; supports Teams Direct Routing for inbound/outbound call integration.
Collaboration suite with messaging, voice, video, and a Teams connector that enables calling from the Teams client.
#15 Intermedia Unite
UCaaS platform delivering voice, video, chat, and a Teams integration for call routing and presence sync.
#16 Star2Star
Cloud communications suite with voice, video, and a Teams Direct Routing integration for unified calling.
#17 RingCentral MVP
Legacy MVP offering now part of RingCentral; provides Teams integration for voice services and unified messaging.
A lightweight connector that brings Zoom Phone capabilities into Teams, allowing Teams users to place Zoom calls without leaving the Teams UI.
Enables any SIP‑based carrier (e.g., Twilio, Bandwidth) to provide PSTN calling inside Teams, effectively turning Teams into a UCaaS platform.
#20 Twilio Flex
Programmable contact‑center platform that can be embedded in Teams via APIs, delivering voice, chat, and video alongside Teams calling.
#21 Bandwidth Voice
Cloud voice API platform with Teams Direct Routing support, allowing businesses to run their own PSTN service inside Teams.