Migration & upgrades

Upgrade to Mendix 11 LTS - safely, end to end.

Plan your upgrade Read the upgrade playbook

Before you upgrade

What's New in Mendix 11

See every feature and every breaking change from 11.0 to the 11.12 LTS in one place - so you know exactly what changes when you move from Mendix 9 or 10.

Read the guide

Why upgrade now

The latest platform, without the risk.

Still on Mendix 9 or 10? Mendix 11.12 became the first Mendix 11 LTS release in June 2026, with 11.18 (December 2026) and 11.24 (June 2027) on the roadmap. Golden Earth handles the move end to end.

Plan your upgrade

Stay ahead of end-of-support

Mendix supports three majors at once (9, 10, 11); support ends when the third later major ships - so staying on 9, then 10, carries growing security and support risk.

Long-term stability

LTS is the most stable track, with the longest support window and critical fixes only.

Real performance gains

Mendix 11 brings significant Studio Pro speed improvements to the developer workflow.

AI and agentic capabilities

Access to Mendix's latest AI-assisted development (Maia) on the current platform.

A smoother path forward

The Update Assistant surfaces exactly what changes, and Marketplace modules update without losing customizations. No breaking changes between 11 LTS versions, so each upgrade builds cleanly on the last.

Our process

How we upgrade you.

Documentation-first from start to finish - the lowest-impact path from one LTS to the next.

Assess

We review your current applications and version, and map dependencies and risks.

Plan

A clear, staged upgrade plan sized to each application's criticality.

Migrate

We perform the upgrade, updating Marketplace modules without losing customizations.

Test

Thorough testing so nothing breaks in production before anything ships.

Hand over

Documented, reviewed, and predictable from start to finish.

Common upgrade paths

Mendix 9 to 11 LTS, Mendix 10 to 11 LTS, and staying current across 11.12, 11.18, and 11.24.

Planning a Mendix 9/10 to 11 LTS upgrade?

We help teams plan and de-risk the jump to the latest LTS - assessment, sequencing, breaking changes, and testing before go-live.

Talk to an upgrade expert

FAQ

Upgrade questions, answered.

When does Mendix 9 lose support?

Mendix supports three major versions at once (currently 9, 10, and 11), and support for an older version ends when the third subsequent major version is released. Because timelines shift, we confirm your specific version's status against Mendix's official support documentation as part of the assessment.

How long does an upgrade take?

It depends on the number and complexity of your applications and how many versions you're jumping. After a short assessment we give you a clear, staged estimate rather than a vague range.

Will an upgrade break my customizations?

Our process is designed to avoid that. Marketplace modules can be updated without losing customizations, and the Update Assistant flags exactly what needs attention - which we test thoroughly before anything reaches production.

What's the difference between LTS and MTS?

LTS (Long-Term Support) is the most stable track with the longest support window and critical fixes only - ideal for mission-critical apps. MTS (Medium-Term Support) ships more often and gives faster access to new features, with a shorter support window. We'll help you choose the right track for each application.

Plan your upgrade.

Talk to a Mendix migration specialist - reviewed, documented, predictable.

Talk to a migration specialist