Here is a list of fonts by the same designer, in case that might help.

- Lex

When you say ‘similar’, what in particular would you want to be like Quadraat? I think of stroke and letterforms as making a font similar, but are there particular letters that you like in Quadraat? How close does it have to be?

I don’t think a list of fonts by the same designer is going to be very much help, because usually a designer explores different styles in different fonts.

If we had some idea what it is that you like most in Quadraat, maybe it would be easier to make suggestions.

I think Underware’s Dolly has some of the “feeling” as Quadaraat.

A lot of the look and feel of Quadraat has to to with it’s designers’ views on type production (now and in the past).
Fred Smeijers has produced a wonderful little book (Counterpunch) about this — you may want to check it out. It will make quite clear why Quadraat is a unique typeface. And why it’s gonna be hard to find similar typefaces.
(I’m biased, I know. I’ve used Quadraat for a pet project, some time ago, and am completely smitten with it).

I’m a compositor and I just got a new journal, which has been set in Quadraat for years. The press I work for cannot use Quadraat legally and I have been asked to find something new, something that will come pretty close to matching, since there will be no new design. This is something I rarely do in my job and I’m finding it difficult. So, when I say similar, I guess I do mean stroke and letterforms, and possibly especially the way that Quadraat italic looks. Sorry, I know I’m out of my element here!