Fly.io is described as 'Edge computing is the new frontier. Fly brings the untapped potential of intelligent edge-servers to your finger-tips. It's a global load balancer, a smart reverse proxy, a library of powerful Middleware; it's a CDN that developers like you control' and is a CDN in the business & commerce category. There are more than 50 alternatives to Fly.io, not only websites but also apps for a variety of platforms, including SaaS, Linux, Self-Hosted and Mac apps. The best Fly.io alternative is Cloudflare, which is free. Other great sites and apps similar to Fly.io are Heroku, Netlify, SwiftWave and Microsoft Azure.
The experience is seamless, and super easy to get started. We found the price/performance to be above Fly.io.