What are some alternatives?
When comparing kitefaster.com Deep Sleep Sounds and Defonic, you can also consider the following products
A Soft Murmur - Ambient sounds to wash away distraction.
Noizio - Feeling that the noise of the big city is too much for you to bear?
Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
Rainy Mood - Rainy Mood is the world's most popular rain simulator. Sleep, study, and relax with the sound of rain.
Krisp - Mute the background noise during your calls
MyNoise - Custom shaped online noise machines. Many Many generic sounds