Top Alternatives to PaintTool SAI

Adobe photoshop is one the best commercial photo editing and design app.

Krita is a professional free and open source painting program.

MyPaint is an easy-to-use painting program which works well with Wacom graphics tablets and other similar devices.

Microsoft Paint (formerly Paintbrush) is a simple computer graphics app that has been included with all versions of Microsoft Windows.

Seashore is an open source image editor for Mac OS X's Cocoa framework. It features gradients, textures and anti-aliasing for both text and brush strokes.

SketchBook Pro, also referred to as SketchBook, is a pixel graphics software application that features a radial/pie-menu user interface, intended for expressive drawing and concept sketching.

Clip Studio Paint (Manga Studio or ComicStudio) is a family of software applications for Mac OS X and Microsoft Windows used for the digital creation of comics and manga.

Corel Painter is a raster-based digital art application created to simulate as accurately as possible the appearance and behavior of traditional media associated with drawing, painting, and printmaking.

FireAlpaca is the free paint tool that is available in 10 languages and compatible with both Mac and Windows.

MyBrushes is a digital Painting and drawing tool for Mac.

Livebrush is a simple drawing program with a lot of potential.

Vectr is a free online vector graphics editor.

Photopea is a free online image editor, that runs without plugins. It can both read and save PSD files.

GIMP Paint Studio is a great pack of designing components like brushes, dynamics, gradient etc.

openCanvas is a raster graphics software.

Leonardo is a painting application.

PixBuilder is a free photo editing software program for PC.

Verve Painter is a small GPU based painting application, that paints using brushes and 2D fluid dynamics for a real-life paint look.