I found a github link in there, it was a little buried

GitHub

H.O.R.N.E.T Storage

Nostr Relay with Dashboard🌐 Choose Paid, Public or Invite-Only Mode👥 Self-Host Your Posts and Code📂 - H.O.R.N.E.T Storage

I think nestr is something completely different. I think Nestr might still be a WIP.

GitHub

H.O.R.N.E.T Storage

Nostr Relay with Dashboard🌐 Choose Paid, Public or Invite-Only Mode👥 Self-Host Your Posts and Code📂 - H.O.R.N.E.T Storage

I'm suspecting is the CDN part of their relay management software (?)

Nestr is the desktop app. @HORNETS is the all in one relay that stores everything from notes to media and git repos, secured by your signatures. Both are not truly available yet. We’re working hard to release them soon. ✊