Contao Maintenance: Your CMS Professionally Managed

Contao differs fundamentally from other CMS platforms in its dependency management. Since Contao 4, the entire platform is managed via Composer: the Contao core bundle, all installed extension bundles and their transitive dependencies form a complex dependency network. A core update can trigger compatibility conflicts with installed bundles that only become visible through careful testing. Applying updates directly to the live system risks outages and data loss.

The Contao templating system adds another layer of complexity: Contao uses PHP templates that need to be adapted during major updates. Anyone who has created custom template overrides in their own theme directory must check after every core update whether those overrides still align with the new core template structure. This requires deep knowledge of the Contao template hierarchy and the change history of each version. Without that expertise, subtle rendering errors appear that only surface after go-live.

Contao follows a clearly structured version cycle. Minor versions appear regularly, bringing security patches and new features, while major versions like the move from Contao 4 to Contao 5 introduce deep changes to the architecture, template system and bundle API. Contao 5 introduces new Symfony version requirements, revised content element APIs and a modernized template framework. Installations still running on the EOL 4.x branch no longer receive security updates and should be migrated promptly.

We guide Contao migrations as structured projects: first the inventory with bundle catalog, template analysis and identification of outdated custom extensions. Then the step-by-step migration on the staging environment: core update, bundle compatibility checks, template adjustments and intensive testing of all content elements, forms and backend configurations. The live switchover takes place in a defined maintenance window with a documented rollback plan. This approach has proven itself across numerous migration projects and prevents unplanned downtime. Further details about our security update process are available on the dedicated service page.

Contao is built on the Symfony framework and leverages its multi-level caching system. The Contao page cache stores fully rendered pages, enabling very short response times without database queries when correctly configured. Contao also uses Symfony fragment caches for partially rendered pages and an HTTP cache for static resources. These cache layers must be configured in a coordinated manner; otherwise invalidation issues arise where content changes are not reliably visible to visitors.

At the database level, Contao installations accumulate orphaned records over time: unreferenced content, old versions of content elements and temporary log entries. Regular database cleanup via the Contao maintenance tool and direct database optimization keep query times low. For installations with extensive news archives, member management or event calendars, index maintenance is particularly critical as those tables grow significantly.

The backup strategy for Contao installations accounts for the specific file structure: alongside database and filesystem, the Composer lock file, custom templates, upload directories and configuration files must all be backed up consistently. We create daily full backups with a documented recovery process. Backups are stored encrypted in a geographically separate data center and tested monthly for successful restoration. For Contao installations with high-traffic member areas or e-commerce integrations, we recommend additional hourly incremental backups.

Our Contao maintenance is a managed service that takes full technical responsibility for your installation. From security patches to performance care and backup management, we cover all technical aspects. You focus on your content and core business while we ensure the technical foundation stays stable, secure and current. Flexible maintenance contracts with clearly defined SLA parameters make getting started straightforward, without long-term lock-in.

In a no-obligation initial consultation, we analyze your Contao installation, assess its technical condition and recommend a maintenance package that fits your requirements and budget. We review the bundle landscape, security status, performance configuration and backup state — and give you an honest assessment.