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Purple and Casper are both on the leading-edge of the online mattress industry. Casper broke onto the scene in a big way and became a well-known brand with a strong track record. For its own part, Purple has made its name with a unique, proprietary, and patented material that is employed in the comfort layer of its mattress.

As mattresses that have a generally similar price point, deciding which one is the best for you can be a struggle. This can be especially hard when considering a mattress like the one from Purple, which has a very distinct type of comfort layer compared to the Casper and many other foam mattresses that are on the market.

Both Casper and Purple offer other mattress models (such as Casper’s Wave and Essential mattresses and the “New Purple Mattress”), but this comparison focuses only on the flagship offerings from each company. We’ll review the nuts-and-bolts of these mattresses and compare the performance of each to help you make a decision about which will be best for you.

Mattress Construction Comparison

There are some pretty significant differences between the construction of the Purple and Casper mattresses, and this section will introduce you to the fundamentals of how each of these mattresses is built.


The Original Purple mattress is 9.5” tall with 3 layers covered by a knit fabric cover. The top layer is 2” of the company’s Smart Comfort Grid. This material is known as a Hyper-Elastic Polymer that is a large array of small squares. When pressure is applied, the squares compress, and then they quickly bounce back when weight is removed.

The second layer is 3.5” of polyfoam with a density of 1.8 PCF that is designed to help bolster the top layer. The base layer is 4” of support polyfoam with a density of 2 PCF.



The flagship Casper mattress is 9.5” tall with a polyester cover. Under the cover are four layers of foam. The top layer is 1.5” of a specialty open-cell polyfoam. This layer is designed to provide contouring while staying cool and not allowing the body to sink too deeply into the bed.

The second layer is 1.5” of memory foam, which enhances the amount of contouring and pressure point relief provided by the mattress. The third layer is 1.5” of transition polyfoam, and the bottom layer is 5” of a support polyfoam.


Firmness Comparison

A key factor in any mattress purchase is finding a mattress that is going to be comfortable. After all, if your mattress doesn’t feel right, you’re going to have a hard time getting to sleep and staying asleep throughout the night.

When it comes to comfort, firmness is the name of the game. The degree to which a mattress is hard or soft is absolutely central to its feel. At the same time, this is completely subjective since what type of feel is most comfortable for you will be different from what is most comfortable for other people. There isn’t any one firmness level that works for everyone, so choosing the appropriate firmness level for you can help make sure that your bed will be a place of relaxation and rest.

A scale of 1-10 is used to describe mattress firmness, and on this scale, 1 is the softest a mattress can possibly be while 10 is the firmest. Very few mattresses are produced at the extreme ends of this scale, and the most common level of mattress firmness is medium-firm, falling between 5-7 on this typical firmness scale.

Both the Original Purple and Casper mattresses are considered medium firm. The Purple is around a 6 on the typical firmness scale, and the Casper is a 6-7. Most people find the Casper to be slightly firmer than the Purple, but overall, the feel is generally similar.

Sleep Experience

Both the Purple and the Casper mattresses strive to provide a sleep experience that balances comfort, support, and resilience. As a result, they have many characteristics that are similar, but because of the differences in the materials that are employed in these mattresses, there are also some noticeable differences.

Temperature Control

Overheating during the night happens for two main reasons. First, if the body sinks too deeply into a mattress, then it’s impossible for air to move around the body to cool it down. Second, many foam materials themselves retain heat, increasing in temperature through the night. For many sleepers, this can be extremely disruptive and uncomfortable.

The Purple mattress is a great choice for people who prioritize sleeping cool. The Hyper-Elastic Polymer used in the top comfort layer does not retain heat the way that most foams do, and it is also very resilient, which helps to prevent the body feeling trapped or swallowed by the mattress. The Casper mattress also has features to help with temperature regulation, such as open-cell foam, and most customers do not find that it sleeps hot. But when it comes to sleeping cool, the Purple is a top choice.

Motion Transfer

Both the Purple and the Casper do an excellent job of motion isolation and limiting disruptions that come from movement of another person who is sharing the bed. The bounce from the Purple mattress makes it transfer slightly more movement, but this will not be noticeable by most sleepers.


Responsiveness refers to how well a mattress can tailor its support to different parts of the body. A more responsive mattress is better at giving modified levels of cushioning to the parts of the body based on how much those parts of the body need. This kind of responsiveness goes a long way in promoting healthy spinal alignment.

The Purple and Casper mattresses both provide a responsive sleeping surface, but the way that they do so is quite different. For the Casper, responsiveness is offered by the two topmost layers, which are made of a proprietary polyfoam and memory foam. These layers contour to the body without being overly plush. For the Purple mattress, the Smart Comfort Grid is built to compress proportionally to the weight that is applied to it. It has less of a contouring feel than the Casper but still gives tailored cushioning to encourage alignment of the back and neck.

One difference when it comes to responsiveness, though, is that the combined comfort layer in the Casper is an inch thicker than in the Purple mattress. This added thickness can help the mattress be more supportive for people who weigh over 230 pounds or people who have very sharp pressure points.

Resilience and Bounce

The Hyper-Elastic Polymer used in the comfort layer of the Purple mattress bounces back to its original shape very quickly, which makes the Purple a very resilient mattress. This makes it easier to move around on the top of the bed. The Casper also has some bounce, but it does not regain its shape nearly as quickly as the Purple. For customers who put a priority on having a springy feel for their mattress, the Purple is a better fit.

Edge Support

Both of these mattresses are at best average when it comes to edge support. Materials that compress — like foam and the Hyper-Elastic Polymer — are usually weakest at the edges. Because neither mattress has materials designed to reinforce the edges, people who often sit or sleep near the edge of their bed may find the support there to be lacking.

Off-gassing and Smell

After unboxing, you should expect there to be some smell from both the Casper and Purple mattresses. For either option, the smell should go away within a few hours to a few days in any well-ventilated room. It is also important to know that any smell is not harmful.

Shipping, Trial, Warranty, and Returns

The shipping, sleep trial, warranty, and return policies are very similar.

Purple Casper
Delivery fee Free Free
How is it shipped? Bed-in-a-box Bed-in-a-box
White glove delivery No At additional cost and only in select markets
Old mattress removal? No Only in select markets and with white-glove delivery
Sleep trial length 100 nights (request that you try for 30-nights) 100 nights
Return cost and process No cost; company picks up No cost; company picks up
Warranty length 10 years 10 years

Prices, Sizes, and Value

The prices for each size of the Purple and Casper mattresses are listed in the table below.

Mattress Size Purple Casper
Twin N/A $595
Twin XL $699 $645
Full $899 $895
Queen $999 $995
King $1,299 $1,195
California King $1,299 $1,195

The Purple mattress is slightly more expensive than the Casper, but both are in same general price range. Purple tends to offer a bit more in terms of coupons or discounts, but it is also normal for Casper to have promotions that keep pace with those offered by Purple. As a result, price is not a major differentiator between these two popular mattresses.

Within the context of the mattress industry as a whole, both the Casper and Purple mattresses can be thought of as very solid values. Each has a proven track record and quality design with a price tag that is accessible to a broad range of customers.

Purple Mattress vs. Casper Mattress – Which One Should You Buy?

Choosing between two mattresses that share so many features and characteristics can be a challenge. This is especially true for Casper and Leesa which both have a bevy of great verified reviews and a track record of happy customers. As a result, the following section can help give some clear ways of choosing among these two heavyweights of the online mattress industry.

If you’ve narrowed your choices down to the Original Purple and the Casper mattresses, you’ve clearly done your homework. Both of these mattresses are known for delivering a high-level of performance at a reasonable price. With a strong reputation for each, it can be tough to make a final choice about which to buy. We’re here to help if you are looking for some additional guidance about which is right for you.

Buy the Purple mattress if you:

Are ready to try an innovative mattress material: if you’re the type of person who likes experimenting with new products and designs or if you’ve tried out other mattress types and want something new, the Purple mattress is a perfect fit. It’s unique comfort layer material provides a different feel that many people love.
You want a bouncier mattress: the nature of the Smart Comfort Grid material in the top layer of the Purple mattress is to be more resilient, which gives the Purple a bouncier feel. If you like more bounce or worry about feeling stuck in your mattress, the Purple may be good fit for you.
Want to know detailed mattress specifications: Purple shares the details about the density and composition of their mattress layers while Casper protects most of that information as proprietary. If it’s important to you to know the details, go with the Purple mattress.


Buy the Casper mattress if you:

Know you like the feel of an all-foam mattress: if foam works for you, there’s no reason to experiment with a different material like the one that is used in the Purple.
You weigh over 230 pounds: the Purple mattress only has 2” of thickness in the comfort layer, which may not be enough to support heavier people. If you weigh over 230 pounds, you may “bottom out” of the top layer of the Purple, and as a result, the Casper will offer better cushioning and support.
You need a Twin mattress: though Purple has a Twin XL offering, they do not offer their mattress in a Twin size. If you need this specific size, only the Casper will work for you.


Casper and Purple are both leading companies in the online mattress industry, and most customers are extremely satisfied with both. Now that you have all the details, you can make an informed choice for which one to purchase.

At the same time, because each comes with a sleep trial, you can sleep easy knowing that you have time to try the mattress out and make sure it’s the best bet for your comfort and support.

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