WordPress and similar Content Management Systems (CMS), such as Joomla and Drupal, are indeed widely utilized by many web development companies, but not universally. WordPress is particularly popular because it allows for quick development, customization with themes and plugins, ease of use, and a robust community offering plentiful support and resources. This makes it especially appealing for web development firms that need to provide rapid deployment and cost-effective solutions, particularly for small to medium-sized businesses and clients looking for easily manageable websites.

However, the choice of tool or platform largely depends on the specific needs of a project. Some companies might opt for fully custom solutions using frameworks like React, Angular, or Vue.js, especially for more complex websites or applications requiring specific performance optimizations. Additionally, enterprise-level projects may use CMS like Adobe Experience Manager or Sitecore due to their advanced features and scalability.

Thus, while WordPress and similar tools are prevalent and have a significant market share in the web development industry, the selection between using these platforms or other approaches is often driven by the project’s requirements, the client’s budget, and the development team’s expertise.