What are some alternatives?
When comparing Adobe Animate and Synfig Studio, you can also consider the following products
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Pencil2D - Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old...
Adobe Fireworks - Adobe Fireworks is a bitmap and vector graphics editor.
Spine - Spine is 2D animation software designed specifically for software and game development.
Toon Boom Harmony - Production-ready animation software for every artist, in any style.