End of Life (EOL)

What is End of Life (EOL)? 

End of Life (EOL) refers to the point at which a software vendor officially discontinues support, maintenance, and distribution of a product version. When software reaches EOL, the vendor no longer releases security patches, bug fixes, performance updates, or new features. More critically, EOL often means the product is no longer recommended for use, may be removed from download channels or marketplaces, and may no longer be compatible with current infrastructure, browsers, or third-party integrations (depending on the software). 

Unlike other lifecycle milestones, like End of Support (EOS), EOL represents a hard stop: the software is effectively retired. In comparison, End of Support (EOS) is when a company stops providing maintenance, security patches, and technical help for a product; but the product itself continues to function and can still be used.

Why is End of Life (EOL) Important to Know? 

EOL matters because running software past its end-of-life date exposes organizations to significant risk. Security vulnerabilities discovered after EOL are never patched, leaving systems open to exploitation. Compliance and regulatory requirements often mandate that organizations migrate away from EOL software within defined timeframes. 

Infrastructure updates (operating system upgrades, database versions, browser compatibility) can render EOL software inoperable without warning. Beyond risk, EOL creates technical debt: vendors stop investing in the product, third-party developers abandon integrations, and your team faces an increasingly isolated platform. The longer an organization delays migration from EOL software, the more costly and disruptive the eventual transition becomes. 

How Does EOL Work, and Why Does It Matter? 

EOL follows a predictable lifecycle. Vendors announce support timelines years in advance, typically providing a series of milestones: a final update date, a final security patch date, and an EOL date. From the EOL date forward, the vendor provides no support, no patches, and no maintenance. This matters because the transition is not gradual; it is immediate. A vulnerability discovered on day one after EOL is not fixed. An integration breaking due to a framework update has no vendor recourse. Organizations must plan migration well in advance; attempting to move platforms on an emergency timeline is expensive, error-prone, and disruptive to business operations. 

End of Life (EOL) vs. End of Support (EOS): What's the Difference? 

Organizations often conflate EOL and EOS, but the distinction is critical for users. End of Support (EOS) means a vendor stops releasing updates, security patches, and hotfixes, but the software continues to function. It remains available, runs on current infrastructure, and organizations can keep it operational indefinitely if they accept the risk of no new patches. End of Life (EOL), by contrast, is a broader retirement: the product is deprecated, no longer recommended, may be delisted from distribution channels, and compatibility with modern systems is not guaranteed. 

Real-world examples of EOS and EOL in 2026: 

• Drupal 10 reaches EOL on 9 December 2026: the platform is no longer maintained or supported; organizations must upgrade to Drupal 11.
• Umbraco 13 reaches EOL on 14 December 2026: vendors stop supporting the version; new functionality and security improvements move to Umbraco 14 only.
• Sitecore undergoes a significant support-model change on 1 June 2026: multiple legacy versions are reaching EOL and EOS across different product lines.
• Adobe Experience Manager (AEM) 6.5 continues to approach EOL: with vendors signaling end-of-life across legacy implementations.

By comparison, Kentico Xperience 13 reaches End of Support (EOS) on 31 December 2026, not End of Life (EOL). This means that Kentico will stop releasing updates and hotfixes for Kentico Xperience 13, but the platform itself does not expire, is not delisted, and remains compatible with supported infrastructure. 

Organizations can remain on Kentico Xperience 13 beyond 2026 if they choose, but they will forgo new features and patches. However, they have time to plan an upgrade to Xperience by Kentico without any emergency pressure. 

How Can Organizations Manage EOL Risk? 

The strategic response to EOL is proactive migration planning. Rather than waiting until EOL arrives, organizations should establish a platform lifecycle management program: track EOL dates for all software in use, assign ownership of upgrade projects, and build migration into your roadmap well before EOL. 

Platforms like Xperience by Kentico are designed to keep migration efficient, offering tools, documentation, and support to reduce the time, cost, and risk of moving from legacy systems. Migration planning also creates an opportunity to reassess your technology stack, consolidate tools, and adopt newer capabilities that legacy platforms cannot deliver. 

How Does Xperience by Kentico Support a Smooth Transition Away from EOL Platforms? 

Xperience by Kentico is built to simplify migration from EOL content management systems and digital experience platforms. The platform includes: 

• API-first architecture that ingests content and data from legacy systems without rebuilding from scratch
• An evergreen approach for continuous, seamless updates, security and performance enhancements with no upgrade disruption
• Content migration tools and templates that accelerate the mapping and import of existing content, metadata, and taxonomies
• Zero-downtime deployment capabilities that allow organizations to test and validate Xperience by Kentico in parallel with legacy systems
• Dedicated migration support and resources 
• Modern infrastructure compatibility: Xperience by Kentico runs on current cloud platforms, databases, and frameworks 
• Extensible architecture that allows you to preserve custom logic and integrations from legacy platforms, reducing rework

By upgrading to Xperience by Kentico, organizations reduce the technical debt accumulated by aging platforms, gain access to AI capabilities (including agentic AI via AIRA Agentic Marketing Suite), and eliminate EOL and EOS risk for years to come. 

How Do Companies Benefit from Proactive EOL Planning? 

Organizations that plan migration before EOL hit three critical outcomes: cost control, operational continuity, and strategic momentum. 

51% of organizations use software that has reached end of life, and 33% say legacy tech has seriously compromised their security (Aseva).  By contrast, organizations that migrate proactively report improved team productivity, faster time-to-market for new features, and stronger security postures. 

Within Xperience by Kentico, customers report completing migration faster than expected due to the platform's migration tools and support infrastructure. 

Migration success stories include: 

• Forvis Mazars, a migration from a Drupal platform to Xperience by Kentico: With help from SilverTech, one of the largest public accounting firms in the U.S. moved from a legacy Drupal platform to Xperience by Kentico and experienced a 61% increase in users. 
• CommonWealth ONE, a migration from Umbraco to Xperience by Kentico: This credit union migrated with help from ZAG Interactive and achieved a 18% increase in engagement.
• United Federal Credit Union, a migration from Sitecore to Xperience by Kentico: After this credit union migrated from their outdated platform, in collaboration with SilverTech, they increased the speed of their workflows by 90%.

Explore other customer stories on migration to see how others have successfully transitioned from legacy platforms to Xperience by Kentico.