Sleep Foundation

Sleep Foundation is a United States website combining sleep health education with product testing across mattresses and bedding. Reviews and buying guides cover mattresses by sleeper type, material and comfort, and compare well-known brands such as Casper, Saatva, Sleep Number, Nectar, Bear, Tempur-Pedic, Helix, DreamCloud and WinkBed, alongside pillows, sheets, weighted blankets, comforters and mattress toppers.

The site also runs a mattress ratings database and a mattress quiz, and covers at-home and in-lab sleep testing, CPAP machines and masks, anti-snoring mouthpieces, mouth taping, and sleep apps and magnesium and sleep supplements.