What are Free Pascal relations with Embarcadero/Delphi
With Embarcadero itself, zero
and their community?
Indirect via dual-maintenance of components. But that is community to community, nothing formalized.
I understand that open source project can hardly compete with commercial, but are you competitors?
Well, we do compete quite well on price
I mean, is FP taking part of their business?
Or may be you are cooperating and supplementing each other?
I think most markets are supplemental. Yes, some paid customers crossover from Delphi to Lazarus, but most of those either cross because of target support.
Some people also cross because they are on relative old versions, and Embarcadero has become prohibitively expensive. In D2009-DXE times, professional and enterprise updates could be had for resp 250-500 and 500-750 Eur, and you could skip a few versions.
Now it nearly requires that amount yearly in mandatory subscription That is a stiff price for people for which the Delphi side of thing is not core business.