What are some alternatives?
When comparing Instagfy and Gif Slice, you can also consider the following products
Plotaverse - Photo animation made easy, animate like the pros
GifBook - Make animated GIFs into paper flip books
Tall Tweets for Google Slides - Tweet your Google Slides as animated GIF images
Gif Cube - Turn gifs into physical cubes
ASCII Prints - ASCII art on your wall ¯\_(ツ)_/¯
Lively - Make GIF and short movies from your live photos.