This looks great. I briefly self-hosted 'wwwsqldesigner' but it barely worked well enough and needed project-specific hacks. Also didn't route the lines as nice as these screenshots.

The $5/mo Pro plan says "Up to 50 team members"

Just to clarify, that means $5 per person who can share within their 50 person team, right?

The free plan seems quite reasonable/generous 100 diagrams/5 members. It says "Purchase Now" though instead of "Sign Up"