GRAVIT vs Affinity Designer

Gravit has a free version, but there is paid version with more features.

Works on Windows, Mac and Linux.

Gravit has a built in exporter to PDF, JPG, PNG and SVG.

The panels in Gravit adjust to contain the information needed based on the type of element selected, preventing the clutter that Photoshop often experiences.

The ability to assign layers to specific pages, and view single or multiple pages at once makes it easy to design an entire website without getting lost in thousands of layers. Easy to view multiple pages at one time.

With Gravit you can re-use the same design for buttons, inputs, etc, in multiple places, with changes synced every where the element is used. It's also possible to set text to a shared style to sync text changes throughout the app.

The ability to open Sketch files makes it easier for Linux/Windows users to collaborate with people who use Sketch, which is macOS specific.

Rather than a monthly subscription based model, Affinity Designer instead has a one-time fee ($49.99).

The user interface of many graphic editing software programs can often be discouraging for beginners. Affinity Designer, however, has a very well laid out and intuitive user interface with a small learning curve.

Extensively tweakable brush types, color options...

An object can easily be transformed into a slice that can then be exported in various sizes end formats in 1 go. E.g. Export slice A as PNG 1x, 2x and 3x AND GIF 1x AND SVG.

Symbols can get individual property changes (color, shape, layer effects, fonts text...) while the other properties stay linked with the base symbol.

For those working in mixed environments that aren't 100% MacOS, you'll find devoting yourself to Sketch.app brings with it...pain. If this fits the bill for what you need feature-wise and you're in a mixed OS environment, it's a very capable replacement for Sketch.app. Note that it doesn't have all the same features, but then again it doesn't need all the same features. Short of organization differences inside the document you're working on, there shouldn't be anything you can't do with Affinity Designer that you could have with Sketch.

Available on both Windows and MacOS

In the era of "retina" displays, 4k UHD, 5k, and even 8k, Scalar Vector Graphics - independent vector images that can scale to any resolution without any display quality loss - are more important now than ever.

And this tool is quite capable of rendering true SVG output suitable for consumption at any display resolution (not a big bunch of rasterized bits in the document, actual paths, points, etc.).

Unlike some design tools, Affinity Designer isn't trying to be all things to all people. It's focused on its main area of expertise: vector graphics. That's not to say you can't use a raster image (think a photo in *.jpeg format for example), but it's not built to do much with that other than using it somewhere amidst the layers and that's about it.

These are companion apps & switching between them is built in - Photo is a very powerful raster tool with a feature set close/better to Photoshop, it will also use some Photoshop plugins. This allows you to add-on powerful raster capabilities if you want them - put doesn't force you to.

Best I have seen in a non Adobe app, you can use most of the Photoshop mock-ups and templates easily. Opens most Adobe files to a level to be able to effectively use the content. Allows cross team collaboration across tool-chains.

The new version 1.5 has a very powerful feature set such as support for symbols and asset windows, as well as constraints controls and improved export options. This all adds up to an interesting alternative to Adobe Illustrator.