WordPress started in 2003 with a single bit of code to enhance the typography of everyday writing and with fewer users than you can count on your fingers and toes.
Drupal was created over ten years ago and released as open-source software under the GNU Public License. That means it’s completely free to download, use, and modify: There are no purchase, license, or maintenance fees.
Drupal is web development
Drupal’s default installation is a database-backed web platform with file maintenance tools and a high level of security. Many developers take advantage of Drupal’s extensible architecture to go far beyond the “core” package.