What are some alternatives?
When comparing AudioKit Synth One and Sampulator, you can also consider the following products
Ableton - Music production software and hardware.
Splice Beat Maker - Make and share beats in your browser
Hover Camera Passport - This self-flying camera drone is the new selfie stick
BlokDust - Join blocks together to build sounds with this web-based music making app.
Ramsophone - A generative art/music machine. (Be sure to refresh!)
Magenta Studio - Make music & art using machine learning