Apache is a free and open-source cross-platform web server software.
Blitz provides intelligent static page caching for creating lightning-fast sites with Craft CMS.
Contentful is an API-first content management platform to create, manage and publish content on any digital channel.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Imperva is a cyber security software and services company for networking, data, and application security.
Open Graph is a protocol that is used to integrate any web page into the social graph.