Popular brands selling memory foam mattresses include Nectar, Casper, and Saatva, among many others. While Nectar provides very affordable memory foam mattresses, some brands, such as Saatva, may use more natural materials. Each memory foam mattress will have individual advantages and drawbacks, and the best memory foam mattress brand will depend on what a person is looking for. People should prioritize brands that use CertiPUR-US certified foam, provide lengthy warranty and sleep trials, and offer affordable products.