On March 19, 2026, research firm Metrigy published its full-year 2025 enterprise communications market data. The headline number: the global CCaaS market hit $8.4 billion in revenue, up 16.4% year-over-year. That is the fastest growth rate among all enterprise "as a service" categories Metrigy tracks, outpacing both UCaaS (6.1%) and CPaaS (4.2%).

At InflectionCX, the Unified CX company, we read this report differently than most vendor press releases frame it. The growth rate is impressive. But the most consequential data point in the entire report is buried in a single sentence: more than two-thirds of agent seats worldwide are still on customer-owned, customer-managed platforms. The Unified CX framework exists specifically because this migration wave creates conditions in which buyers make decade-long architecture decisions under pressure, often without a clear governance plan for how AI, data, and vendor dependencies will interact once the new platform is live.

Metrigy forecasts the CCaaS market to reach $13.3 billion by 2030, growing at a 9.8% CAGR. That math implies roughly $5 billion in new annual revenue entering the market over five years. The question for CX leaders is not whether the market is growing. It is who captures that growth and what the buyer gives up in the process.

Market Share vs. Momentum: Two Different Stories

The 2025 revenue share rankings look stable on the surface. NICE leads at 22.3%. Genesys follows at 20.0%. Five9 holds third at 12.7%. These three vendors collectively control more than half the global CCaaS market.

But the growth story tells a different story. Metrigy's data shows Cisco, Dialpad, and Genesys posted the largest year-over-year revenue growth among all CCaaS providers in 2025. Two of those three are not in the top three by market share.

Cisco's growth is particularly instructive. The company entered the cloud-native CCaaS market late relative to NICE and Five9. Its installed base of on-premises contact center seats, reportedly around 3 million, gives it a built-in migration pipeline that pure-play CCaaS vendors cannot replicate. ZK Research principal analyst Zeus Kerravala noted in CX Today that much of Cisco's recent CCaaS growth stems from converting its own on-premises base rather than winning competitive displacements. That distinction matters. A vendor growing by migrating its own captive install base faces different competitive dynamics than one winning open-market deals.

Dialpad's presence on the fastest-growth list is worth tracking for a different reason. It suggests that mid-market and upper-mid-market buyers are making CCaaS decisions outside the traditional enterprise shortlist. The CCaaS selection process increasingly splits along segment lines, and buyers who default to evaluating only NICE, Genesys, and Five9 may be missing vendors gaining traction in their specific tier.

North America remains the dominant region, accounting for 71% of total CCaaS revenue in 2025, according to Metrigy. That concentration means U.S. and Canadian enterprises are absorbing most of the vendor investment in AI, integrations, and go-to-market. Buyers outside North America should be asking harder questions about feature parity, data residency, and regional support commitments.

The Governance Gap in the Migration Wave

The two-thirds-on-premises figure demands more scrutiny than the growth rate does. These are not small contact centers running outdated Avaya systems in a closet. Many are large, complex, multi-site operations with deeply embedded integrations, regulatory requirements, and workforce processes built around their current platforms.

When these organizations migrate, they do not simply move phone calls to the cloud. They make architectural decisions about where AI models run, who owns interaction data, how quality management and workforce optimization integrate, and whether a single-vendor or multi-vendor stack will govern the customer experience. These decisions, once made, are expensive to reverse. A three-year CCaaS contract with deeply integrated AI and analytics creates switching costs that persist well beyond the contract term.

Metrigy's data does not address this governance layer. Market share reports rarely do. But for the CX director evaluating a CCaaS migration in 2026, the vendor's revenue ranking matters far less than the answers to operational questions: Who owns the training data generated by AI models running on customer interactions? What happens to historical reporting and analytics if you switch vendors in year four? Whether the platform supports a multi-vendor architecture or forces a single-stack dependency. How data residency and compliance requirements are handled across regions.

The vendors winning the next wave of migrations will be the ones that answer these questions clearly. The buyers who fail to ask them will discover the answers later, usually during a contract renewal negotiation where their leverage has evaporated.

What CX Leaders Should Do With This Data

This report is useful as a market snapshot. It is not a buying guide. The gap between market share rankings and actual fit for a specific enterprise operation is wide. Buyers should treat this data as context, not as a shortlist.

Three specific actions based on what Metrigy's numbers reveal:

• The VP of Contact Center Operations should benchmark their current per-seat cost against CCaaS alternatives, but should also include the full migration cost: integration work, data migration, retraining, and the productivity dip during the transition. The headline subscription price is not the total cost. The go-live risk mitigation playbook provides a framework for scoping what that real number looks like.

• CIO or CTO should evaluate whether the fastest-growing vendors (Cisco, Dialpad, Genesys) are growing because they are winning competitive deals or because they are converting captive install bases. The answer changes the competitive dynamics and the buyer's negotiating position. Ask each vendor on your shortlist what percentage of 2025 new seats came from competitive wins vs. existing customer migrations.

• The CFO or procurement lead should pressure-test the three-to-five-year total cost model against a scenario in which you need to switch vendors at year four. If the switching cost estimate exceeds 18 months of subscription fees, the vendor dependency risk is real and should be reflected in the contract terms. The vendor selection playbook covers how to structure these protections before you sign.

The CCaaS market is growing. The migration wave has not crested. And the decisions enterprise buyers make in the next 18 months will define their CX architecture for the rest of the decade. Those decisions deserve more rigor than a market share chart can provide.