UCaaS Biannual Market Share & Forecast Analysis: 1H26

The Workplace Collaboration MetriCast 2026 study for calling and collaboration platforms shows the continued movement from on-premises infrastructure to UCaaS, defined as multitenant, cloud-based UC and telephony services. UCaaS provides businesses with more flexibility and access to the latest features and capabilities.

Businesses have a few choices for their phone architecture and, given that the migration to UCaaS is rarely a 100% cutover on day one, some companies utilize more than one platform type. In our study, 49.1% of respondents indicated utilizing multiple phone system types, including UCaaS. Today, 27.7% of businesses are utilizing just UCaaS.

This report provides in-depth details on UCaaS spending, market share and forecast, and vendor selection, along with segmentation by size and global region. Highlights of the study include the following:

• The global market size for UCaaS was $23.0 billion in 2025, up 6.1% year-over-year (YoY). Metrigy forecasts the market to grow at a 4.0% CAGR from 2025 to 2030, reaching $28.0 billion by 2030. Today less than half of telephony seats worldwide are still on customer-owned platforms, either managed by the company or in a dedicated hosted environment, representing significant migration potential for UCaaS. The forecast has not changed since the beginning of the year.
• There are several global and regional UCaaS providers with varying levels of capabilities. Based on 1H26 UCaaS global revenue, Microsoft remains the global market share leader (19.3%), followed by RingCentral (7.7%), Zoom (5.7%), and Cisco (3.5%). In 2025, worldwide seats grew 6.9% over 2024, to 117.1 million. Cisco, Gamma, and Zoom had the largest seat growth in 2025, though their growth didn’t impact leadership positions. Other leading providers include 3CX, 8x8, AstraQom, BlueIP, Comcast, Crexendo, Dialpad, Evolve IP, Fusion Connect, Gamma, Google, GoTo, Intermedia, KDDI, Kinetic, Lumen, Nextiva, Sangoma, SK Telekom, Tata, Tele2, Verizon, Vonage, Wildex, and others.
• 41.8% of businesses use the same vendor for contact center and UC, whether they have dedicated platforms or buy as a service (UCaaS/CCaaS). The biggest value businesses find in using the same vendor is facilitating chats among agents and other employees to resolve customer issues, followed by cost savings.
• Among those using UCaaS, 38.9% have no plans to replace their primary provider. Cost is the number one reason companies are looking to make a change, followed by a lack of integrations and push for a single, integrated platform for UC and contact center.