PBX & UC Quarterly Market Share & Forecast Report: 2Q26

The Workplace Collaboration MetriCast 2026 market study shows continued decline for on-premises PBXs. For features beyond calling, businesses now typically bolt on collaboration services such as meetings and messaging from the cloud, while some continue to utilize legacy on-premises conferencing and collaboration applications. As with declining markets, the on-prem PBX business has collapsed to just a few vendors. In order of share, Cisco, Avaya, Mitel, Alcatel-Lucent Enterprise (ALE), and NEC hold the bulk of the market. A few other vendors and open-source options comprise the remaining business. Of the five with on-prem PBXs, only Cisco and ALE have their own UCaaS offerings, placing them in a unique position of having the potential to keep those calling customers on their own platforms as they migrate to cloud.

This report provides details on dedicated PBX spending, market shares, market size and forecast, and vendor selection, along with segmentation by size and global region. Highlights of the study include the following:

• While the market for PBXs has been declining since 2012, it is still a billiondollar market globally. The global market size for PBXs was $1.8 billion in 2025, down 4.6% year-over-year (YoY). Metrigy forecasts the market to decline at a 6.5% CAGR from 2024 to 2030, ending at $1.3 billion by 2030. The market decline is due to the transition to UCaaS and businesses holding onto PBX assets for 20+ years, with limited reason to upgrade core telephony solutions. Metrigy measures PBX manufacturing revenue only; it does not include revenue from management systems, service, or support in the forecast.
• PBXs are deployed worldwide, but 47.2% of revenue ($874.5 million) came from North America in 2024. Companies with over 10,000 employees represent the largest spend on PBXs in 2024, at $740.0 million, or 39.9% of the total.
• Based on 2025 PBX revenue, Cisco is the global market share leader at 45.8% share, followed by Avaya (19.8%) and Mitel (17.0%). For the year, the two  standouts include Avaya, which grew revenue 1.4% YoY, and Alcatel-Lucent Enterprise, with flat YoY revenue.
• 2Q26 PBX revenue grew 7.6% YoY from 2Q25. For the quarter, Cisco led global PBX revenue market share with 50.5% share, followed by Avaya (17.6%) and Mitel (14.2%). Cisco recorded a 15.1% YoY increase of its PBX revenue in the quarter, leading the growth in 2Q26.
• Among companies using on-prem PBXs, only 35.9% have no plans to replace their primary vendor, same as our study showed a year ago. Desire for integrated UC and contact center platform and cost are the top reasons for those looking to make a change, followed by lack of AI capabilities and moving to UCaaS.
• The top reasons businesses are staying with on-premises PBXs are for better security and cost savings. The top drivers for businesses moving to UCaaS in the next year are better scalability and cost savings. It’s interesting that some businesses stay with their on-premises solution to save costs and others move to UCaaS to save costs, with cost savings being a top driver for both decisions.