Umbraco 17 LTS (Long-Term Support) version was released on November 27, 2025, and it’s a major release. It will offer three years (till November 2028) of stability, security updates, and support to websites.
This latest LTS version marks a major milestone for developers, agencies, and digital teams creating scalable, high-performance websites. Positioned as the next long-lasting foundation of the Umbraco ecosystem, Umbraco version 17 brings speed, improved workflows, enhanced composability, and future-ready architecture – making it one of the most impactful updates of the past few years.
Read along to learn more.
A latest Umbraco 17 LTS foundation: Stability meets innovation!
With Umbraco’s structured release cycle, LTS versions are the most trusted for enterprise-grade projects.
As mentioned, Umbraco 17 LTS will receive 3 years of support, making it the ideal choice for businesses prioritizing long-term stability without compromising website performance.
Important advantages of LTS version include:
- Reliable security updates
- Long-term bug fixes
- Predictable upgrade path
- Reduced maintenance overhead
For enterprises with complex content workflows or multi-site ecosystems, Umbraco 17 will help as a strong, dependable backbone.
Performance boost with .NET 9
One of the biggest highlights of Umbraco 17 is its migration to .NET 9, bringing profound performance improvements:
- Faster startup time
- Better memory handling
- Speedier request processing
- Enhanced concurrency
These developments will directly translate into:
- Faster page loads
- Improved SEO
- Better Core Web Vitals
- Higher user satisfaction
For large, content-heavy sites, frictionless performance is crucial.
New and improved Backoffice (Belle -> Modern Backoffice)
After years of anticipation, Umbraco’s backoffice has taken a significant leap forward.
What’s new?
- More intuitive interface
- Enhanced accessibility
- Faster content editing
- Modern UI components built for extensibility
This upgrade reduces friction for editors and marketers, assisting them move faster and collaborate more effectively.
Enhanced composability and package ecosystem
Umbraco 17 strengthens the ecosystem around third-party packages and composable architecture.
New improvements include:
- Better extension points
- Stronger support for package maintainers
- More standardized approaches for custom development
For digital agencies and developers, this means easier integrations, simpler upgrades, and reduced technical debt over time.
Improved workflow for developers
Umbraco 17 LTS version focuses on developer happiness.
Its major enhancements include:
- Cleaner APIs
- Improved deployment workflows
- More predictable upgrade processes
- Enhanced CLI tooling
- Better support for headless and composable DXP approaches.
Developers transitioning from v10 or v12 will also find the upgrade path smoother due to clear documentation and structured migration guidance.
Stronger focus on security and compliance
In a world of increasing data risks, Umbraco 17 reinforces its foundation with:
- Enhanced authentication flows
- Improved permission handling
- Stronger default configurations
- More secure API architecture
These updates help enterprises maintain compliance with global standards like GDPR and enterprise IT governance policies.
Future-ready: better headless, cloud, and AI integrations
Umbraco 17 LTS is built for a longer span of digital transformation.
It prepares teams for:
- Headless CMS models using Umbraco Heartcore or custom APIs.
- Cloud-native hosting on Azure and other cloud providers.
- AI-driven workflows, including content generation, personalization, and automated testing.
This ensures that systems built on Umbraco 17 can scale with emerging technologies with seamless performance delivery.
Organizations should upgrade to Umbraco 17
Websites running on older versions (v8–v12), especially before the .NET 6 era, need to be upgraded as a high priority due to outdated .NET versions.
Moreover, for long-term stability, businesses need to upgrade to Umbraco 17. This LTS version is designed for large organizations, government portals, universities, and enterprises. The upgrade ensures their SEO performance won’t be hampered by slower rendering or poor load times during traffic spikes.
Belle-based UI in Umbraco 17 offers a better editor experience for teams. This upgrade is also helpful if an organization is moving towards headless CMS architecture or microservices-based infrastructure.
Also, the latest Umbraco version supports modern DevOps. Thus, upgrade and leverage various newly added features of Umbraco 17 LTS version.
Also read: AI Automated Accessibility widget vs Manual Accessibility service
Wrapping up
Umbraco 17 LTS is not just an upgrade – it’s a foundation designed for speed, longevity, composability, and modern digital experiences. With its performance gains, improved backoffice, and future-ready architecture, it empowers organizations to build smarter, faster, and more scalable websites.
Whether a developer, content editor, or digital strategist, the Umbraco 17 release brings meaningful improvements for everyone that will shape the next generation of Umbraco-powered experiences.
If your team is exploring ways to upgrade website performance, streamline content operations, or modernize an existing digital ecosystem, Umbraco 17 LTS offers a strong path forward. Skynet Technologies supports organizations in planning, migrating, and optimizing Umbraco development with a focus on stability, scalability, and long-term value. Reach out hello@skynettechnologies.com to our team for discussing how this LTS version can help elevate digital experience.
