Arc is a peer-to-peer CDN that pays site owners for using it. Instead of expensive servers in distant datacenters, Arc's network is comprised of browsers.
Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.
GitHub Pages is a static site hosting service.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Varnish is a reverse caching proxy.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.