# What is Contao? Contao is a flexible and easily expandable open-source content management system (CMS) used for creating accessible and responsive websites. It offers an intuitive user interface that’s easy for novices to operate. This CMS solution is an alternative to large and comprehensive solutions like Joomla! or TYPO3. ## Contao CMS offers powerful features for flexible and accessible websites Although Contao CMS hasn’t yet gained the widespread recognition of major content management systems, it has built a highly active community. With over 175,000 websites created using this solution, Contao has established a solid presence. First released in 2006, the open-source software was renamed from TypoLight to Contao in 2010 to avoid confusion with TYPO3. Contao is a classic **web content management system** that excels in creating accessible websites. While it’s less focused on social or blog publishing, blog extensions are available. **Technical facts about Contao:** - Programming language: PHP - Database: MySQL / MariaDB - Output in XHTML or HTML5 - Based on the Symfony web framework (current version based on Symfony 5) - License: [GNU Lesser General Public License](https://www.gnu.org/licenses/lgpl-3.0.en.html "GNU") **An overview of the key features of Contao:** - Advanced editing feature - Full-text search engine - Integrated file manager - Form generator - Core modules for news and event management - Password-protected member area - Newsletter module - Multilingual/multi-site capability - Accessibility Here you will find the [download link for the latest version of Contao](https://contao.org/en/download "Current version of Contao"). ## Advantages and disadvantages of the Contao CMS Comparing CMS platforms can be challenging, as it ultimately depends on the specific use case. Contao offers numerous advantages that make it particularly attractive for accessible and professional websites. However, there are also factors that could present challenges, depending on the project’s scale and experience level. **Strengths:** - A wide range of features available in the basic version. - A diverse selection of [extension modules](https://extensions.contao.org/ "Contao extensions"), including the **Isotope eCommerce** shop system, layouts, and templates. - Intuitive usability and strong accessibility features. - Long-term support ensuring up-to-date software. - A robust community and comprehensive documentation for support. - A hierarchical page structure that simplifies the management of multiple pages and makes it easy to handle meta tags, redirects, and visibility through the structure tree. - Flexibility in designing responsive and multilingual websites. - SEO tools like **search engine-friendly URL generation** and automatic XML sitemap creation make website optimisation easier. **Challenges:** - Template implementation can be complex and requires experience. - In larger projects, clarity may be lost. - Social publishing and blogging are less integrated compared to other CMS solutions. Tip If you’re unsure whether Contao is the right CMS for you, check out the online demo available on the project’s website. It allows you to access the backend of a Contao installation and explore the content management system firsthand. ## System requirements There aren’t many requirements for installing Contao. A web server with **PHP and MySQL support** is all you need. PHP should be at least version 7.4+, and MySQL must be version 8.0+ or an equivalent MariaDB version. Contao also requires specific **PHP extensions**, which are typically enabled by default in most PHP installations but can be disabled by the hosting provider. However, Contao will check to ensure that all necessary extensions are active. The [official Contao documentation](https://docs.contao.org/5.x/manual/en/installation/system-requirements/ "System requirements for Contao") lists the required PHP extensions. ## Applications of Contao Contao is a highly versatile CMS **especially well-suited for medium to large web projects**. Companies like Siemens and Telekom successfully use it, thanks to its powerful and easily extendable architecture. It’s also accessible to less experienced users due to its straightforward operation. With features like accessibility, SEO tools, and an integrated newsletter module, Contao is particularly appealing for corporate websites. For projects that demand **higher performance and security**, the Jamstack approach is an excellent choice. It combines static pages with dynamic content through APIs and JavaScript, ensuring optimal performance. ## Alternatives to Contao Although Contao offers numerous advantages, such as accessibility and flexible customisation, other content management systems may be worth considering depending on your project’s needs. **Each CMS has its own strengths**, providing unique features that are better suited for specific applications. ### WordPress is the most popular CMS for simple and expandable websites WordPress is the most widely used CMS worldwide, making it an excellent choice for blogs, small business websites, and simple online stores. With easy installation and an intuitive interface, you can quickly create professional websites with WordPress even without prior experience. Thanks to a **wide range of plugins and themes**, WordPress can be easily extended and customised. While it’s perfect for smaller projects, it can also handle larger websites with the right extensions. ### Joomla is the flexible CMS for multilingual and complex websites Joomla is a versatile open-source CMS, particularly well-suited for websites that require more complex structures, such as **multilingual portals or community platforms**. It offers greater customisation options than WordPress, making it ideal for projects that need specific functions and high flexibility. However, Joomla also has a steeper learning curve and demands more technical expertise to [create a Joomla website](https://www.ionos.com/en-ie/digitalguide/websites/website-creation/creating-a-joomla-website/). ### TYPO3 is the powerful CMS for large enterprise projects TYPO3 is a robust, scalable CMS that is especially suitable **for large enterprises and complex web projects**. It offers a wide range of functions and extensions that allow the creation of highly complex websites. However, TYPO3 requires substantial technical know-how, and the learning curve is steeper than with systems like WordPress or Joomla. ## Contao is the flexible CMS for various project sizes - Contao is especially **appealing for beginners** who prefer not to rely on WordPress. - With its focus on accessibility and multilingual support, the CMS is also ideal for professional corporate websites. - Backed by an active community and regular updates. - A solid alternative to WordPress, Joomla, and TYPO3, depending on the specific project needs. - Built-in features for optimisation and communication. ## Contao and accessibility In Ireland, the **Disability Act 2005** requires public sector bodies to make their digital services accessible to individuals with disabilities. This includes websites, mobile apps, and other digital platforms used by the public. While the Disability Act doesn’t explicitly specify technical accessibility standards, it aligns with the **EU Web Accessibility Directive (2016/2102)**, which mandates compliance with internationally recognised guidelines, particularly the Web Content Accessibility Guidelines (WCAG). These guidelines encompass requirements such as: - Providing alternative text for images (‘alt texts’) - Ensuring keyboard accessibility (e.g., no reliance on mouse use) - Offering sufficient colour contrast, zoom capability, and clear navigation - Ensuring compatibility with assistive technologies like screen readers Contao offers a robust technical foundation to meet these accessibility standards. The CMS generates **clean, semantic HTML5** by default, supports ARIA labels, ensures screen reader-friendly navigation structures, and provides accessible forms, along with a clear separation of content and layout. In newer versions, such as Contao 5.4 and 5.6, focus indicators, navigation logic, and other accessibility features have been improved, enabling websites to meet many WCAG criteria out of the box. However, accessibility compliance in Ireland is not solely determined by the CMS. The final accessibility of a website depends on factors such as the theme used, individual development, design choices, and editorial maintenance. Missing alt texts, inaccessible interface elements, or poor layout choices can hinder accessibility despite a technically sound foundation. When properly implemented, Contao enables the creation of legally compliant websites that support accessibility standards set forth by Irish legislation and the EU Web Accessibility Directive. This is a markdown version of: [https://www.ionos.com/en-ie/digitalguide/hosting/cms/contao-the-sleek-cms-solution-at-glance/](https://www.ionos.com/en-ie/digitalguide/hosting/cms/contao-the-sleek-cms-solution-at-glance/) for AI/LLM consumption.