Not a designer myself, but at our company Sketch is not an option because (afaik) Sketch files are not editable on anything else than macOS. So Figma it is.
I was really impressed (but initially skeptical) when I saw that their webapp is built with C++ and compiled for the web. Pretty cool to see their crossplatform efforts paid off:
Woah, emscripten in production. Yeah, color me impressed as well.
Interesting, we have a Sketch to Invision workflow that works pretty well for devs who aren’t on Macs. The biggest turnoff for me regarding Figma is the fact that you need to have access to the web in order to use it. With Sketch, I can use it as long as my laptop has power. This is great if you have to do work in planes or hotels that have sketchy WiFi.
While not the full experience, Figma does work offline for already-imported files if you use their desktop client.