RingCentral is a unified communications and contact center platform for SMBs, mid-market companies, and enterprises that combines cloud business phone, video meetings, team messaging, contact center, and AI-powered agent assist into a single global communications platform. Marketed as unified business communications and contact center software, RingCentral combines RingEX cloud phone with HD voice and SMS, RingCentral Video meetings with AI summaries, team messaging, RingCX cloud contact center with omnichannel routing, AI-powered RingSense conversation intelligence, integrations with Microsoft Teams, Salesforce, HubSpot, Google Workspace, Outlook, and 300-plus business apps, dedicated mobile and desktop apps, plus enterprise SSO and global PSTN coverage in 100-plus countries. RingCentral is a strong fit for SMBs replacing legacy PBX systems, mid-market support teams unifying contact center channels, and enterprises consolidating phone plus video plus messaging.