[on_and_off]

There is also Affinity Designer.

Sketch became a good enough default very quickly, but there are starting to be several competitors that are just as good if not way better.

[mortenjorck]

Affinity Designer is an excellent tool for illustration and graphic design, and it can work as a UI design tool as well (better at least than Illustrator or Photoshop), but nothing else (outside of browser-based tools) has quite leaned into the UI design niche like Sketch has.

Sketch turned an important corner when it introduced two things: Symbol overrides and scaling constraints. These two things made UI design in Sketch a massively more streamlined process than any other product, and while other packages have started to adopt them, Sketch has stayed ahead by further developing these features along with shared library support and a robust plugin API enabling further workflow-enhancing tools like Sketch Runner.

Sketch is, however, fairly terrible as a general-purpose vector editor. Its clumsy shape tools are bad enough that I usually start any icon design in Affinity Designer and then import to Sketch.

[arvinsim]

Affinity Designer is also does not have the psuedo subscription style that Sketch uses.

They also allow you to install it in as many machines as you like. Sketch forces you to buy a license for each of your computers.

[CharlesW]

I'm glad you mentioned this. There are many reasons why I'm no longer using Sketch, but their weird pricing model is the reason I finally decided enough was enough.

[nacs]

And Affinity Designer is incredible on the iPad/iPad Pro as well. Amazing vector and raster tools and its pretty much a straight port of the desktop version.

[kumarharsh]

Affinity is great on Windows too, and with a reasonably good price point.

[JKCalhoun]

Affinity Designer, Affinity Photo, Pixelmator, Pixelmator Pro, Graphic, Sketch. I purchased them all, trying to find which I prefer. All excellent actually.

I just don't want to subscribe to software.

[deltron3030]

Affinity Designer isn‘t really comparable, it‘s more a general vector tool for artist and creating from scratch, not a design/prototyping environment for designers with a rich ecosystem and integrations.

[potta_coffee]

I like Affinity Designer a lot and use it for my design work. Adobe lost me the day they went to a subscription model.