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