Sumario now Open Source and runs on Fly.io

The website doesn't mention fly.io, why is it in the title and why does it matter?

Reminds me of formspree which I used years ago. I found it's still very much alive at formspree.io

This is great. I wonder what other software people pay for that might be better as open source.

Sumario is a form handler for static websites.

Rick Roll for the intro video?

Sumario looks wonderful but I had faced more complex cases and building Formester.com.