Sure, it was made with guitars in mind, but it is equally great for mangling your synths, drums, vocals, or whatever else you care to throw at it. I've long been a proponent of guitar stomp boxes as a source of unique sounds, and pedalboard gives you a virtual array of these which can be arranged in any combination and order you like. Distortion, fuzz, ring modulation, wah filters, chorus, phaser, flanger... you name it, if it's a type of stomp box, you're likely to find it available here. When you take into account these particular effects combos only take up a single insert and that you can apply as many further plug-ins as your processor can handle, you can see how powerful the possibilities are.
So the next time you're looking for a way to add a unique touch to your synths, don't pass over stuff like Pedalboard just because it was made for guitars. The results might surprise you.