Umbraco V13 loses security support in December 2026. Upgrade to V17 now
20 years of upgrading organisations on Umbraco
• 500+ Umbraco projects • 20 years of Umbraco expertise • Upgrades from £14,999* ·
What changes after V13 support ends?
After December 2026, Umbraco stops issuing security patches for V13. Your site keeps running, but the risks start compounding immediately.
Your organisation carries the risk
Security gaps go unpatched. Any data submitted through your site, forms, logins, transactions, loses its official protection. For organisations in financial services, legal, healthcare or the charity sector, that becomes a board-level compliance conversation.
Your team absorbs the cost
Without bug fixes, your developers spend time solving problems a supported platform would handle automatically. What should be maintenance becomes firefighting.That time has a cost.
Your competitors move forward
Every month on V13 after end of life is a month your competitors on V17 move further ahead. The gap starts quietly. Then new features stall, budget conversations get stuck on infrastructure, and the work you actually want to do keeps waiting.
Your users notice
A platform that stops moving forward shows. Pages slow down. Integrations behave unexpectedly. Accessibility gaps widen. Users do not know your CMS is end of life. They just know the experience feels slow.
Move to Umbraco V17
V13 is running out of time. Book an upgrade call before the deadline moves for you.
December 2026 is closer than it looks
V13 has been in the security-only phase since December 2025. Your team may already be firefighting instead of moving forward
Upgrading now means choosing your partner, your budget, and your timeline.
By late 2026 those choices get made under pressure.
With 20 years of Umbraco expertise and dedicated partnership, we treat your upgrade as a catalyst. It's how you improve what you have, align your platform with where your organisation is heading, and arrive on V17 in a stronger position than you started.
If you're waiting for the perfect time to upgrade, this is it.
"We've had a perfect partnership. We're delighted with what you have done — not only in terms of the upgrade, but everything that followed."
Fuji • Vice President • The Lux Collective
What's to love on Umbraco V17?
Your developers get a modern, extensible platform
Modern web components
Umbraco 17 runs on modern Web Components: extensible, stable, built to last. Developers build on the platform now rather than around it.
.NET 10
Umbraco Version 13 runs on .NET 8, which reaches end of life this year. Upgrading to V17 on .NET 10 eliminates the need for development teams to manually patch issues, and aligns with Umbraco 17's support window through to 2028.
AI for developers
Supercharge efficiency by connecting any AI tool, Claude, Cursor or GitHub Copilot directly to Umbraco and automate the repetitive stuff with controlled access, scoped permissions and your governance rules, your way.
Built to scale
V13 runs the Backoffice on a single server: one point of failure, one ceiling. V17 distributes across multiple instances simultaneously empowering editors work at full speed regardless of team size.
Your editors get independence, speed, and AI assistance
Backoffice AI assistance
Generate alt text, SEO titles, meta descriptions and content summaries directly in the Backoffice, with zero developer involvement. AI generates. Humans approve. Nothing publishes without you.
Automated content workflows
V17's open AI architecture lets us build workflows that translate pages, bulk-update content, or fix accessibility issues across your site. Automation that V13's closed backoffice can't support.Accessible by design
The backoffice has been independently audited against WCAG standards. For editors who rely on assistive technology, and for organisations with accessibility obligations, V17 meets the standard.
AI access to live content
The Content Delivery MCP Server is coming soon. Published content becomes instantly available to your chatbots, search assistants, personalisation engines to enhance customer experience.
Umbraco Copilot
In 2026, V17 will feature a built-in chat assistant inside the backoffice. Ask it to build a campaign page, rewrite a section in your brand voice, or check content consistency across the site.
Your leadership gains certainty, compliance, and a lower cost of ownership
Fixed price
The upgrade fee is set before the project begins and stays there. Agreed upfront, delivered as promised.
Zero AI vendor lock-in
V17 connects to any AI provider: OpenAI, Claude, Google Gemini, Amazon, Microsoft. Switch providers at any time as V17 stays independent of whatever happens in the AI market.
3 years of security and compliance
Full security patches, bug fixes and compliance-aligned support through to November 2028. Planned, budgeted, and defensible.
V13 vs V17
How does Umbraco Version 13 and Version 17 compare?
Umbraco Version 13
End-of-life: ❌ December 2026
Technology: ❌ .NET 8 - expires soon
Backoffice: ❌ AngularJS - discontinued
Scheduled publishing: ❌ Server time - unreliable
Editorial teams: ❌ Single server - cannot be load balanced
Back office accessibility: ❌ Not independently audited
AI tools: ❌ Limited, DIY and dev-heavy
Verdict: ❌ At risk now
Umbraco Version 17
✅ November 2028
✅ .NET 10 - Microsoft's current LTS
✅ Modern Web Components
✅ Always anytime, everywhere
✅ Load balanced across multiple instances.
✅ WCAG audited
✅ AI editor tools & MCP Server
✅ Stable platform
From £14,999
Clear pricing, timeline, and deliverables
Your V13 to V17 upgrade starts from £14,999. Complex sites get a fixed scope, fixed cost, and a clear timeline, all agreed before any work begins.
Full platform upgrade
V13 to V17, .NET 8 to .NET 10, AngularJS Backoffice to Web Components, all package updates.
Testing and QA
We break things in staging so nothing breaks in production.
Knowledge transfer
Your editors and developers know what's changed and how to use it from day one.
Post-launch support
We don't disappear after go-live.
The Umbraco 17 Upgrade Guide
Version-by-version guidance, what V17 means for your organisation, and what to consider before you start.
If you're looking for a sign to upgrade, this is it
The best time to upgrade is when you have time to do it properly, with a full testing cycle, no pressure, and your choice of partner. Every V13 site will need to upgrade. The only question is whether you do it on your terms or on Umbraco's timeline?
*More complex architecture? Get in touch to discuss your perfect upgrade path, transparent fee and a timeline.
How long does an Umbraco V13 to V17 upgrade take?
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Will my custom extensions still work on V17?
What is the difference between Umbraco V13 and V17?