Contentful is an API-first content management platform to create, manage and publish content on any digital channel.
Envoy is an open-source edge and service proxy, designed for cloud-native applications.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Optimizely is an experimentation platform that helps developers build and run A/B tests on websites.