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Integrated chat, video meetings, file sharing, and cloud‑phone (Microsoft Phone System) with deep Office 365 integration.
#3 RingCentral
All‑in‑one cloud phone, video, and messaging platform with robust API, analytics, and contact‑center modules.
#4 Zoom Phone
Enterprise‑grade VoIP service built on Zoom’s video platform, offering call routing, voicemail, and integration with Zoom Meetings.
Cloud‑based PBX with messaging, meetings, and AI‑driven collaboration tools, tightly integrated with Cisco’s networking hardware.
Google Chat for messaging, Google Meet for video, and Google Voice for business telephony, all unified under Workspace.
#7 8x8 X Series
Unified communications suite with voice, video, chat, contact‑center, and analytics, plus global SIP trunking.
#8 Fuze
Cloud UC platform delivering voice, video, messaging, and screen‑sharing with AI‑enhanced meeting insights.
Hosted PBX with integrated video conferencing, team chat, and mobile/desktop apps for seamless collaboration.
Scalable UCaaS solution offering voice, video, messaging, and contact‑center features with strong enterprise security.
Unified communications platform combining voice, video, messaging, and API‑first integrations for CRM and workflow tools.
#12 Dialpad
AI‑powered cloud phone system with integrated messaging, video, and real‑time transcription across devices.
#13 Rocket.Chat
Open‑source team chat with optional voice/video calling and extensible integrations, suitable for self‑hosted UC.
#14 Mattermost
Self‑hosted Slack‑compatible messaging platform that can be extended with voice/video plugins and telephony bridges.
#15 Nextiva
Unified communications suite featuring business phone, video conferencing, team chat, and CRM integration.
Cloud‑based call center and phone system with integrated chat, ticketing, and AI‑driven call routing.
#17 3CX
Software‑based PBX offering voice, video, chat, and web‑meeting capabilities, deployable on‑premise or in the cloud.
Zoho’s broader suite combining Cliq, Meeting, and Desk for a fully integrated UC experience.
Collaboration hub with persistent chat, huddles (audio), and video calls, plus extensive third‑party telephony integrations.
Enterprise social networking paired with Teams Phone for a holistic internal communications ecosystem.
Video conferencing platform that includes cloud voice (BlueJeans Cloud Calling) and persistent chat rooms.