Casper One vs. Purple Mattress Comparison

Overall Rating

8.2

Casper One

Bottom Line

The Casper One uses a combination of memory foam and polyfoam to provide pressure relief without hugging too close.

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Full Mattress Review

VS

Overall Rating

8.1

Purple Mattress

Bottom Line

The Purple Mattress uses proprietary Purple Grid technology to mimic the strong pressure relief of foam without sleeping hot at night.

Check Price on Purple.com

$1,399 from Purple (queen)

Full Mattress Review

Casper vs. Purple Mattress Comparison Video

Watch the video below to see how the Casper and Purple mattresses compare in our lab.

Our Testing Team’s Take

Over roughly a decade, our team has put almost 2,000 mattresses to the test. In our lab, we examine every model the same way to learn how well they perform in categories like temperature regulation, pressure relief, and ease of movement. 

Our methodology also includes hands-on testing, during which our experts personally evaluate each mattress. They rank each bed using the same metrics, assigning them scores that indicate how comfortable and supportive the mattress was for their sleeping position and weight. At-home trials and in-lab tests give us a thorough understanding of each bed we review, which in turn allows us to recommend the best mattresses to our readers.

Our Verdict

Choosing between the Casper One and Purple Mattress largely comes down to cost and interest in innovative materials. They’re both medium firm (6) beds with very similar performances that speak to their all-foam constructions – they’re excellent at relieving pressure and isolating motion while preventing the heat retention that often occurs with foam. We also found they’re ideal for similar kinds of people, mostly side and back sleepers weighing up to 230 pounds.

Brad Nehring

Senior Product Analyst

Side sleeper

215 lbs.

Sleeps with a weighted blanket

“The Casper One doesn’t contour as closely as previous models from Casper, which earned a thumbs-up from me. I could feel the foam minimize impact near my hips and shoulders, but I never felt like I was sinking into the mattress.”

The major distinction between the two beds is their material construction. The Purple Mattress has the company’s signature Grid system that gives the bed more of a “floating” feel than the Casper One. However, unique materials come at a cost, and you’ll pay significantly more for the Purple Mattress. 

When you’re picking between them, look to see if one is better suited to your weight and sleeping position, then consider how they stack up against each other in the performance categories that matter to you.

Jeremy Klein

Senior Product Testing Manager

Side sleeper

160 lbs.

Nightly melatonin user

“The Purple’s unique “grid” design really sets it apart from traditional all-foam beds on the market. As someone who sleeps hot and enjoys deep cushioning, this mattress nicely checks both boxes.”

Construction and Materials

Though these are both all-foam mattresses with three layers, there are a few important material differences between them.

Casper One Breakdown

The Casper One’s construction incorporates three foam layers. The top comfort layer is made from proprietary polyfoam called Breathe Flex that’s designed to do exactly what it sounds like, adapt and contour to your body’s shape while allowing air to circulate. Thanks to an open-cell structure, it retains less heat than traditional foam. 

The transitional layer is made from proprietary memory foam called Align. It’s intended to create a buffer between the comfort and support layers while evenly dispersing your weight to provide further cushioning. The support core is made from a high-density polyfoam layer that’s durable and stable to prevent you from sinking.  

The cover is a soft, stretchy knit fabric made from a blend of polyester, polyurethane, and Lycra spandex.  This bed has a medium firm feel that ranks as a 6 on our 10-point scale. It’s 11 inches tall and should fit within most standard fitted sheets.

Purple Mattress Breakdown

Like the Casper One, the Purple Mattress also has three layers and a medium firm (6) feel. The first layer is Purple’s claim to fame, the Purple Grid. It’s made out of a hyper-elastic polymer that’s molded into a grid. Its unique formulation is meant to relieve pressure like standard memory foam but with enhanced responsiveness and airflow.  There’s polyfoam around the Grid’s edges to boost support. 

The transitional layer is 3.25 inches of polyfoam designed to cushion your body and adapt to its shape while preventing you from sinking in the layer below. The support core is a 4-inch polyfoam layer that creates a stable base and structure for the other layers to rest on. It has a more even surface than the layers above. 

The cover material is a viscose, polyester, and Lycra blend that’s stretchy and breathable. In total, the Purple Mattress measures 9.25 inches tall.

Mattress Sizing and Weight

The Purple Mattress and Casper One are similarly sized, with the Casper One standing a little more than 1 inch taller than the Purple. However, the Purple Mattress is considerably more heavy, so make sure to get a partner’s help when moving it. They’re available in the same size range that includes twin, twin XL, full, queen, king, California king, and split king.

Performance Ratings

We found that the Casper One and Purple Mattress have very similar pros and cons in terms of performance. Thanks to their thick foam comfort systems, both beds are excellent at relieving pressure points and isolating motion. People with joint pain and light sleepers can rest easy on either model. 

They’re also both good choices for cooling mattresses made from foam. Though they don’t regulate temperature as well as some hybrid or latex models, The Casper One and Purple are both excellent options for people who like the feeling of foam but tend to sleep hot. 

These two beds also have similar drawbacks – they’re tough to move around on and don’t have much in the way of edge support. However, If you have mobility limitations, you may be happier on The Casper, as we found it has a bit better ease of movement than the Purple. 

With medium firm (6) feels, The Casper One and Purple Mattress have wide appeal and a support level that’s suitable for a large swath of sleepers. We found that the Purple is ideal for side and back sleepers between 130 and 230 pounds, while the Casper One is favored by back sleepers under 130 and side sleepers between 130 and 230 pounds. 

Most of our testing groups experienced decent spinal support on these two beds with a few exceptions. Stomach sleepers over 230 pounds found both beds too soft and stomach sleepers under 130 pounds didn’t sleep well on the Purple Mattress.

Full Reviews: Other Casper and Purple Models

Casper One

Overall Rating:

8.2 /10

Price Range:

$599 – $1,198

Mattress Type:

Foam

Firmness Options:

Medium Firm (6)

Casper Dream Hybrid

Overall Rating:

6.7 /10

Price Range:

$1,195 – $2,390

Mattress Type:

Hybrid

Firmness Options:

Medium (5)

Casper Snow Hybrid

Overall Rating:

8.5 /10

Price Range:

$1,310 – $2,620

Mattress Type:

Hybrid

Firmness Options:

Medium (5)

Purple Mattress

Overall Rating:

8.1 /10

Price Range:

$799 – $1,798

Mattress Type:

Foam

Firmness Options:

Medium Firm (6)

Purple Restore Mattress

Overall Rating:

8.5 /10

Price Range:

$1,845 – $3,690

Mattress Type:

Hybrid

Firmness Options:

Firm (7)

Purple Rejuvenate Mattress

Overall Rating:

8.4 /10

Price Range:

$4,495 – $8,990

Mattress Type:

Hybrid

Firmness Options:

Medium (5)

Mattress Pricing

Memory foam mattresses usually run between $700 and $1,200 for an average model. You’ll find the Casper One at the low end of this range and the Purple Mattress a few hundred dollars above it, though both go on sale frequently. The Casper is considerably more budget-friendly but it doesn’t have as many design details as the Purple. 

Durability-wise, we found them comparable. Both should last up to or a bit beyond the average lifespan for an all-foam mattress. Their company policies are also similar, with the only major difference being Casper’s optional White Glove delivery and Canadian shipping.

What Customers Are Saying

Customers enjoy how well-balanced the Casper One feels, reporting a blend of pressure relief and support. Side sleepers especially like how well its foam cradles their hips. Couples give it praise for motion isolation, noting that they can move without creating disturbances. People who’ve owned the bed for a while say that it holds its shape well over time. Some reviews do include drawbacks like a lack of bounce and not enough structure. 

The Purple Mattress gets solid reviews for its design and unique feel. Owners say it alleviates pressure points and offers standout spinal support. It also gets high marks from hot sleepers who say that air flows well through the Grid. Some reviewers say it’s quite durable and remains supportive even after extended use. Not all side sleepers like the Grid though, with some saying it feels unusual.

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