Sulu

Sulu is what a PHP shop already invested in Symfony reaches for: the CMS is itself a Symfony application, released under the MIT licence, so there is no cost to the software and no ceiling on how it is deployed.

The admin interface is built for content editors rather than developers, with a page tree, customisable templates and multi-site, multi-language support out of the box, while the underlying framework stays familiar to anyone who already ships Symfony applications. That combination is why Sulu turns up as the CMS layer inside larger Symfony-based platforms rather than as a standalone product competing on marketing spend.

Sulu GmbH is registered in Dornbirn, Austria, and its own imprint confirms the MIT licence directly rather than through a separate legal page.

There is no cost for the software at any scale, and Sulu GmbH sells professional support, training and consulting on request for teams that want a commercial relationship behind their deployment, though none of those services carry published prices. The trade-off is ecosystem size: Sulu's plugin and template marketplace is far smaller than WordPress's or even Strapi's, and a project will lean on Symfony's own ecosystem to fill the gaps rather than a large catalogue of Sulu-specific extensions.

What Sulu does well

• Free and open source under the MIT licence at any scale
• Built on Symfony, familiar to PHP enterprise teams
• Multi-site and multi-language support built in
• Paid support, training and consulting available from Sulu GmbH
• Austrian company, EU jurisdiction

Where Sulu falls short

• Smaller plugin and template ecosystem than WordPress or Strapi
• Assumes Symfony familiarity to get the most from it
• No published prices for the commercial support packages
• Founding year not published on the vendor's own pages

Standout feature. A Symfony-native CMS under MIT: alongside Contao, Sulu is one of two entries here built to disappear into an existing Symfony codebase rather than sit apart from it.