Vonage Business Communications

Dialpad

Dialpad is a cloud business communications platform combining VoIP calling, SMS, video meetings, and a contact center product into one workspace, with real-time AI transcription and coaching layered across calls and meetings. It positions itself around agentic AI features that can autonomously handle tasks like booking appointments or processing simple requests during support conversations. The platform is split into several products: Dialpad Connect for unified business communications, Dialpad Support for contact centers, and Dialpad Sell for outbound sales teams, each sharing the same AI transcription and analytics engine and integrating with tools like Salesforce, Zendesk, and Microsoft Teams.

Aircall

Aircall is a cloud phone and customer communications platform built for sales and support teams. It provides VoIP calling, SMS, and shared team inboxes alongside AI features such as live call coaching, automatic transcription, and autonomous AI voice agents that can handle routine customer interactions end to end.

3CX

3CX is a business communications platform that replaces traditional PBX hardware with a software-based phone system. It supports voice calls, video conferencing, a website live chat widget, and call center features like queues and reporting, and can be deployed on-premises, in a private cloud, or via 3CX's own hosting service.

RingCentral

RingCentral is a cloud unified-communications platform (branded RingEX) used by over 600,000 businesses for business phone calls, SMS, team messaging, and video meetings in one subscription. It layers AI features on top of core telephony, including an AI Receptionist for automated call handling, an AI Virtual Assistant for meeting notes and translation, and conversation analytics/coaching. Beyond RingEX, RingCentral offers RingCX, a cloud contact center product for omnichannel customer support and outbound dialing. The platform runs on a global network with 99.999% claimed availability across 100+ countries and holds HIPAA, GDPR, SOC 2, and PCI DSS compliance, with 330+ third-party integrations including CRM tools like Salesforce and HubSpot.

Quo

Quo, rebranded from OpenPhone in September 2025, is a VoIP-based business phone system that gives teams shared numbers, calling, and SMS/MMS messaging in one collaborative inbox. Multiple teammates can see and respond to the same business number's calls and texts, with routing rules to direct incoming contacts to the right person. Quo layers an AI agent called Sona on top of the phone system to answer calls automatically, transcribe conversations, and summarize them, along with call recording and analytics. It is used mainly by startups and small businesses that need a professional, multi-line phone presence without deploying a traditional PBX, and it integrates with common CRMs like HubSpot and Salesforce on its higher tiers.