The first is that mainstream support for Sitecore XP 10.3 ended on 31 December 2025. Organisations still running version 9.x have no security patches available at any price, and from 1 June 2026, production incident support and security updates move to a paid model for all versions in Extended Support.
The platform your organisation invested in is ageing faster than the renewal cycle that surrounds it. If you are on Sitecore XP 10.4 you have a little bit more time to work with, but if you have a more complex stack, given the time required to migrate, you need to be looking at this now.
The second is that the analysts are losing confidence in Sitecore: the 2025 Gartner Magic Quadrant for Digital Experience Platforms, ranked Optimizely highest for both ability to execute and completeness of vision, above Adobe and Sitecore. That is an independent assessment from the analyst report that most digital procurement decisions reference, and it represents a significant shift from where the market stood three years ago.
Forrester's 2025 Wave was released in November 2025, and concurred, putting Optimizely out in front of the leaders.
Together, these developments make 2026 the clearest moment in years to ask whether your platform is still the right one. And more importantly, what the future direction of your provision should be.
The most common response to an end-of-support position is to upgrade within the Sitecore estate. It feels lower risk than a migration, and it preserves what has already been built. But the economics deserve scrutiny.
A Sitecore 10.4 upgrade costs at least £200,000, carries all existing technical debt forward, and returns exactly the same decision in 2027. A move to Sitecore XM Cloud avoids that cycle, but it is a full architectural rebuild on a headless platform, with a minimum two-to-three-year licence commitment and a higher cost of ownership than the platform it replaces.
The disruption of a full rebuild is a fixed cost either way. The question really has to be what you should build on next.
Sitecore's strategy has shifted significantly over the past three years. The move from its established XP monolith toward XM Cloud is the right long-term direction, but that transition has unfortunately created real friction for its existing install base.
Forrester's July 2025 Total Economic Impact study found that organisations migrating from XP to XM Cloud had been carrying two to three full-time IT resources just to manage upgrades, patches and hosting on their legacy platform.
That overhead is just part of the real cost of staying on an ageing self-hosted architecture, and it represents internal capacity that should be focused on improving performance rather than standing still with maintenance tasks.
The migration to XM Cloud is also a substantial undertaking in its own right. Features that were standard in XP, including personalisation rules and analytics, require rebuilding or replacing rather than migrating. The gap between the two products is architectural, not cosmetic, and Gartner's 2025 report noted that Sitecore customers cited sticking points in their cloud transitions as a result.
Optimizely's 2025 Gartner position reflects a product that has consolidated meaningfully over the past two years. They have invested in ensuring that content, experimentation, personalisation and commerce can all sit within a unified platform, should that be needed, and the AI layer, Opal, is application native, rather than bolted on. Marketing teams describe the Editor Experience as intuitive. Development teams describe the architecture as clean.
For organisations evaluating a migration, Optimizely's SaaS model removes the infrastructure overhead that characterises life on Sitecore XP. Upgrades are managed by the platform. Performance scales automatically. The internal resource cost of keeping the platform current is predictably low rather than unpredictably high.
For organisations that require more control over the app or the environment PAAS options are available
Optimizely has completed 76 Sitecore to Optimizely migrations. The number going the other way is zero.
JCB moved from Sitecore to Optimizely with Mando Group and achieved a 12% conversion rate uplift post-migration.
CIPS, which serves over 100,000 members worldwide, completed its migration to Optimizely with zero downtime.
Richard Francis, Chief Technology Officer at CIPS, said:
"The new Optimizely environment is faster for our editors, more robust for our IT teams, and critically, completely invisible to our members in the best possible way. Not one disruption to purchasing, renewals, or sign-ups."
These are the outcomes that matter to a digital leader making a platform decision: faster delivery, lower operational friction, and measurable performance improvement from day one.
The right platform decision is always contextual. Organisations in deeply Microsoft-integrated environments, or those with complex B2B authentication requirements, may find that Sitecore XM Cloud remains a strong fit. Its partnership ecosystem is large, and its enterprise heritage is real.
But for organisations whose primary concern is delivering measurable digital performance, reducing infrastructure overhead, and building a continuous improvement capability around experimentation, personalisation, and most importantly, increasing engagement, Optimizely's current position is difficult to argue against. It leads the analyst rankings, carries a lower total cost of ownership for most use cases, and has a partner network that, while smaller, is highly specialised and well supported.
The question for most digital leaders is not whether Optimizely is the stronger platform in 2026. It is whether the migration is worth the disruption. Our experience, across every migration we have delivered, is that it is, and the support lifecycle changes make the timing clearer than it has ever been.
We are a Platinum Optimizely Partner with direct experience of migrating organisations from Sitecore. Our fixed-fee migration programme starts from £120,000, completes in 90 days for a standard scope, and includes the first year of Optimizely licence at no cost. A Migration Readiness Assessment confirms your scope and fixes the price before any commitment is made - so you have full clarity and transparency before you commit to anything.
Crucially, the migration is not where the value stops. Every migration includes delivery of our Optimise service, so the performance improvement programme begins before go-live rather than as an afterthought.
If you are evaluating your DXP options in 2026, we should talk.