Envoy is an open-source edge and service proxy, designed for cloud-native applications.
Kong is an open-source API gateway and platform that acts as middleware between compute clients and the API-centric applications.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.