Top Picks for King Size Mattresses: Sleep Like Royalty

When it comes to achieving the perfect night's sleep, investing in a high-quality king size mattress can make all the difference. There are numerous brands out there promising comfort and support, but only a select few truly stand out for their exceptional quality and innovation. Among the top contenders are Tempur-Pedic, known for their pressure-relieving memory foam, and Sleep Number, which offers customizable firmness levels. Brands like Saatva and Purple also continue to receive praise for their eco-friendly materials and unique comfort technologies. Curious which king size mattress may be the ideal fit for you? Explore the detailed reviews and comparisons below to discover the best options for your needs.

Illustration of king size mattress

Best brands of king size mattress in 2025

Tempur-Pedic

Tempur-Pedic, a leading brand under Tempur Sealy International, Inc., is renowned for its high-quality king-size mattresses, which have garnered significant market share and customer satisfaction. In 2024, Tempur Sealy International held a market share of 19.29% in the mattress industry. Tempur-Pedic's innovative materials, such as the ventilated TEMPUR-APR(tm) Support Layer, ensure maximum comfort and breathability, making their king-size mattresses a top choice for consumers seeking enhanced sleep quality. The brand has been awarded as America's #1 Brand for Customer Satisfaction with mattresses purchased online by J.D. Power for four consecutive years from 2021 to 2024. With a strong presence in the U.S. market, Tempur-Pedic continues to drive the demand for premium and luxury bedding.

Saatva

Saatva is renowned as one of the best producers of king size mattresses, offering a luxury innerspring design that sets it apart from competitors. Founded in 2010, Saatva has grown to $400 million in sales by providing high-quality, traditionally constructed mattresses with the convenience of online shopping and white-glove delivery. The Saatva Classic Mattress, their best-selling model, comes in three firmness levels and two heights (11.5" and 14.5"), ensuring a fit for nearly all sleepers, with a 365-night trial and a lifetime warranty. This mattress has consistently earned high ratings for comfort, support, and edge support, making it a top recommendation for most sleepers, including combination sleepers and couples. With a score of 9.74 out of 10 in comprehensive tests, the Saatva Classic stands in the top 1% of all mattresses tested.

Purple

Purple is renowned as one of the best producers of king-size mattresses, offering superior cooling and pressure relief. Their king-size mattresses, measuring 76" x 80", are ideal for couples and larger rooms, providing ample space and comfort. In the fourth quarter of 2023, Purple saw a 1.1% increase in sales compared to the previous year, and a significant reduction in net loss from $71.7 million to $18.3 million. The brand's focus on premium products and innovative marketing strategies has driven positive sales trends, including a 33.1% growth in wholesale revenue in the first quarter of 2024. Purple's commitment to quality and customer satisfaction makes it a top choice for those seeking a high-quality king-size mattress.

Casper

Casper, a leading brand in the mattress industry, has garnered significant attention for its high-quality king-size mattresses. Since its inception in 2014, Casper has revolutionized the sleep market with its direct-to-consumer approach, eliminating the need for traditional showrooms. By 2024, Casper, along with other major players like Serta Simmons Bedding and Tempur Sealy International, has contributed to the U.S. mattress market size of USD 18.47 billion, with king-size mattresses seeing a CAGR of 6.7% from 2025 to 2030 due to increasing consumer preference for larger beds. Casper's innovative marketing strategies and focus on customer convenience have helped the company serve over 1 million customers in eight countries, valuing the company at $750 million.

Helix

Helix is a renowned brand in the mattress industry, particularly praised for its king-size mattresses, which offer a range of firmness options from soft (3) to firm (8) to cater to various sleeping preferences. Launched in 2015, Helix has expanded its retail footprint to over 200 locations, including partnerships with Best Mattress stores in Nevada, showcasing models like the Midnight Core, Midnight Luxe, and Midnight Elite. The brand's hybrid construction combines motion isolation with responsiveness, making it ideal for sleepers who switch positions frequently and those who value strong edge support. Helix mattresses are known for their cool sleep surface, thanks to features like the GlacioTex™ cooling cover, and they have received high ratings for pressure relief, especially in models like the Sunset, Dusk, and Midnight. With a 10-year limited warranty and a 100-night trial, Helix ensures customer satisfaction and quality.

Nectar

The Nectar brand is highly regarded as one of the best producers for king size mattresses, known for its medium firm feel, rated a 6 on a 10-point firmness scale, which appeals broadly to various sleeper types. It excels in pressure relief, thanks to its memory foam comfort layer, and offers good motion isolation, scoring 8.5 out of 10 in this category. Despite some limitations in edge support and temperature control, Nectar mattresses are praised for their value and comfort, with customers noting significant relief from back pain. As of 2023, Nectar is recognized as one of the top mattress brands, although the market is dominated by brands like Sealy, which holds a 15% unit share. For comprehensive insights, visit the full Nectar mattress review on Sleep Doctor.

Sealy

Sealy, a leading mattress brand since 1881, is renowned for its high-quality king-size mattresses, offering a wide range of products that cater to various comfort and support needs. With a market share of 15% in the US mattress industry, Sealy is a prominent player, especially under the umbrella of Tempur-Sealy International, the largest mattress maker globally. Sealy's king-size mattresses are part of an extensive product line that includes different firmness levels and advanced features like motion-reducing coils and cooling gel foams. The brand's commitment to quality and comfort has made its mattresses some of the most sought-after in the market. Sealy's long-standing reputation and innovative products ensure that consumers can find the perfect king-size mattress to enhance their sleep experience.

Sleep Number

Sleep Number is a leading brand in the mattress market, particularly notable for its innovative king-size smart beds that offer adjustable firmness, breathable technology, and personalized digital sleep health insights. The brand's new c1 smart bed, priced at $999 for a queen size, extends this technology to a more affordable segment, making high-quality sleep accessible to a broader audience. With features like individualized sleep settings for couples and active temperature control, Sleep Number's smart beds have improved the sleep of over 15 million people, with 94% of users reporting better sleep compared to non-smart beds. The demand for king-size mattresses is expected to grow at a CAGR of 6.7% from 2025 to 2030, driven by consumer preferences for larger and more comfortable sleeping surfaces. Sleep Number's commitment to sleep wellness and innovation positions it as a top choice for consumers seeking premium king-size mattresses. For more information, visit the Sleep Number Newsroom.

Serta

Serta, as part of Serta Simmons Bedding LLC, is one of the leading mattress brands in the U.S., particularly renowned for its high-quality king size mattresses. It holds the second-largest market share in the mattress industry, with Serta continuing to be a top brand in both unit and dollar share. Known for its iconic Perfect Sleeper and iComfort collections, Serta has a long history of producing comfortable and dependable mattresses, having sold tens of millions of units while maintaining a high-quality track record. The company operates 36 American factories and has a broad international presence, contributing to its strong market position. As of 2023, Serta remains a dominant player, with modest gains in market share despite industry competition. For detailed insights on their mattress offerings, visit their Serta mattress reviews page.

Leesa

The Leesa brand is renowned for producing high-quality mattresses, including king-size models, that cater to a wide range of sleepers. With a medium-firm feel rated at 6 out of 10, the Leesa Original mattress is particularly praised for its balanced comfort, excellent cooling performance, and low motion transfer. It has received top ratings, scoring in the top 15% of foam mattresses tested, and is noted for its value, being 7% less expensive than the average all-foam mattress. Discover more about their top-rated mattresses on their official website.