A couple of months ago I tooted looking for a vector grid-based editor. Nothing came up so we (Manufactura Independente) set out to make one.
It still has a set of kinks, but it's usable to the point that we've been using it to make a few designs.
We plan to release it in Feb/Mar under a free software copyleft license (AGPL). It runs on the browser with no server-side logic and no tracking.
If you'd like to try the beta and tell us about your experience, that'd be fab! Just reply to this toot and we'll get in touch.
@rlafuente hey I'm down to try it!
Inkscape supports a couple kinds of grids and multiple independent grids, but it assumes you're going to be changing snap settings constantly so it's high barrier-of-entry for a purely gridded aesthetic
monads.online is a place for friends