[2021] can I play this with someone who has it for xbox and im on a pc?

Thanks everyone for helping to answer this question, at the moment we do not have cross play enabled for Siege, only for the PlayStation upgrade from one generation to the next, PS4 to PS5 and the same set up for the Xbox current consoles.

If this ever changes it will most likely be posted about on Sieges official Twitter page.

To see what cross features are enabled in Siege, please see our article - https://support.ubisoft.com/en-US/Article/000081052/All-you-need-to-know-about-CrossProgression-and-CrossPlay-with-Ubisoft-Connect/

Thanks
- Ubisoft Support