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Casper sells fixed-feel foam and hybrid mattresses; Sleep Number sells adjustable air beds. Here is how they compare on feel, cooling, couples, price and who should choose which.
Casper and Sleep Number solve the same problem from opposite directions. Casper builds a fixed-feel mattress, all-foam or foam over pocketed coils, and ships it compressed in a box. Sleep Number builds a bed whose firmness you change with a remote or an app by adding or releasing air. One is a product you pick once; the other is a system you keep adjusting. That difference matters more than any spec sheet, so this guide walks through what each does well, where each falls short, and who should choose which.
Choose Casper if you want a simple, lower-cost mattress with a balanced medium feel, you sleep alone or with a partner who likes a similar firmness, and you would rather not deal with pumps, power cords or apps. Choose Sleep Number if you and your partner disagree on firmness, your comfort needs change (after an injury, during pregnancy, as you age), or you want sleep tracking built into the bed and you are comfortable paying a premium for it.
| Feature | Casper | Sleep Number |
|---|---|---|
| Construction | All-foam and hybrid (foam over pocketed coils) models, many with zoned support | Adjustable air chambers under foam comfort layers, with a separate chamber per side on most shared sizes |
| Feel and firmness | Fixed feel per model, mostly in the medium to medium-firm range | Adjustable across a wide range on a numbered setting, changed by remote or app |
| Best-suited sleeper | Solo sleepers and couples who agree on firmness; back and combination sleepers | Couples with different preferences; people whose needs change |
| Motion isolation | Good on all-foam models, moderate on hybrids | Good, since each side has its own chamber |
| Cooling | Hybrids breathe well; all-foam models retain more heat despite cooling foams | Varies by model; upper lines add temperature features, entry models sleep like foam |
| Edge support | Better on hybrids than all-foam models | Generally softer at the perimeter, since air chambers do not reinforce the edge like coils |
| Price tier | Entry-level to mid-range, with a few premium models | Mid-range to premium, especially with a smart base |
| Trial and warranty | In-home trial and limited warranty; check current terms | In-home trial and limited warranty; check current terms, and note return conditions on bases |
| Where to buy | Online and through select retailers | Sleep Number stores and online |
Casper helped create the bed-in-a-box category, and its core strength is still simplicity. You pick a model, it arrives compressed, it expands, and you sleep on it. The lineup covers all-foam beds for people who like a soft, cushioned surface and hybrids with pocketed coils for people who want more bounce and airflow. Many models use zoned support, meaning slightly firmer foam under the hips and softer foam under the shoulders, which helps keep the spine in a neutral line for back and combination sleepers.
A Sleep Number bed replaces the coil or foam core with air chambers. You set your preferred firmness as a number, and a pump adds or removes air to match. On queen and larger sizes, each side typically has its own chamber, so two sleepers can choose very different settings on the same bed. Higher lines add sleep tracking and automatic adjustments, and many buyers pair the mattress with an adjustable base.
Both can work. A softer Casper foam model gives steady shoulder and hip relief with no fiddling. Sleep Number lets you dial softness down, but the pressure relief depends on how thick the comfort layer is on the model you choose. See our mattresses for side sleepers for fixed-feel options that cushion the shoulder.
A Casper hybrid, with air moving through the coil layer, usually sleeps cooler than either an all-foam Casper or an entry-level Sleep Number. In a warm Los Angeles summer, a coil core is often worth more than any cooling cover. Browse our hybrid mattresses if heat is your main complaint.
If you disagree on firmness, Sleep Number is the more complete answer. If you agree, a Casper foam model isolates motion well and costs less. A third route: a split king, two twin XL mattresses on an adjustable base, lets each person choose a different mattress entirely. Our split king guide explains how that setup works.
Neither brand is a medical device, but adjustability helps people whose pain changes day to day. If your ideal firmness is stable, a well-zoned fixed mattress does the job for less money.
Casper wins clearly on price. Sleep Number's value depends on how much you will use the adjustability; if you set it once and never touch it again, you have paid a premium for a feature you do not use.
We do not sell Casper or Sleep Number. What we do carry are mattresses that deliver similar feels, and you can lie on all of them at any of our five showrooms before you buy.
Not across the board. Sleep Number is better for couples who want different firmness levels and for people whose needs change. Casper is better for anyone who wants a simple, lower-cost mattress with a balanced feel and no moving parts.
It is worth it if you will actually use the adjustability, especially as a couple with different preferences. If you would set it once and leave it, a good fixed mattress gives you similar comfort for less.
Sleep Number, if you disagree on firmness, because each side adjusts separately. If you like the same feel, a Casper foam model isolates movement well at a lower price.
Entry-level models sleep much like a foam mattress. Higher lines add temperature features. If you run hot and do not need adjustability, a hybrid with a coil core is usually the cooler choice.
Casper's foam and hybrid mattresses are generally designed to flex with an adjustable base, but check the specific model's guidance first. Our guide on mattresses for adjustable beds explains what to look for.
The fastest way to settle foam versus adjustable is to lie on both. Take our sleep quiz for a shortlist, then visit any of our five LA showrooms to test Helix, Brooklyn Bedding, Birch and Tempur-Pedic side by side, with an adjustable base under them if you like. Every mattress comes with our free 120-night comfort guarantee, and in-stock models can be delivered the same day.
Start with a mattress type that suits how you sleep, then compare the feel in person.
Prices for Queen · Choose options for other sizes
Est. $124.84/month for 6 months
Item-price payoff target · excludes taxes and fees.
Synchrony · No interest if paid in full within 6 months. Subject to credit approval.
Interest is charged from the purchase date if not paid in full in time. Minimum monthly payments are required and may not repay the balance in time.
This item price meets the 6-month deferred-interest threshold. We use the longest confirmed period available at this price. Avoiding interest requires paying the promotional balance in full before the deadline. Lender fees can affect total cost; this selection does not establish the lowest total borrowing cost.
This illustration divides the displayed price of $749.00 for one selected item by 6 months, rounding up to the next cent. It is not the lender’s required payment or billing schedule. Check the promotional deadline on your statement and pay the full promotional balance before it ends.
Taxes, delivery, recycling charges and any lender promotional fees are excluded. Fees may add to the total borrowing cost. Additional discounts can change plan eligibility and the amount financed. Confirm the final purchase amount and applicable terms with the store before arranging financing.
Credit approval, applicable account terms and purchase eligibility apply.
How Synchrony deferred interest works
Est. $158.17/month for 6 months
Item-price payoff target · excludes taxes and fees.
Synchrony · No interest if paid in full within 6 months. Subject to credit approval.
Interest is charged from the purchase date if not paid in full in time. Minimum monthly payments are required and may not repay the balance in time.
This item price meets the 6-month deferred-interest threshold. We use the longest confirmed period available at this price. Avoiding interest requires paying the promotional balance in full before the deadline. Lender fees can affect total cost; this selection does not establish the lowest total borrowing cost.
This illustration divides the displayed price of $949.00 for one selected item by 6 months, rounding up to the next cent. It is not the lender’s required payment or billing schedule. Check the promotional deadline on your statement and pay the full promotional balance before it ends.
Taxes, delivery, recycling charges and any lender promotional fees are excluded. Fees may add to the total borrowing cost. Additional discounts can change plan eligibility and the amount financed. Confirm the final purchase amount and applicable terms with the store before arranging financing.
Credit approval, applicable account terms and purchase eligibility apply.
How Synchrony deferred interest works
Est. $146.50/month for 6 months
Item-price payoff target · excludes taxes and fees.
Synchrony · No interest if paid in full within 6 months. Subject to credit approval.
Interest is charged from the purchase date if not paid in full in time. Minimum monthly payments are required and may not repay the balance in time.
This item price meets the 6-month deferred-interest threshold. We use the longest confirmed period available at this price. Avoiding interest requires paying the promotional balance in full before the deadline. Lender fees can affect total cost; this selection does not establish the lowest total borrowing cost.
This illustration divides the displayed price of $879.00 for one selected item by 6 months, rounding up to the next cent. It is not the lender’s required payment or billing schedule. Check the promotional deadline on your statement and pay the full promotional balance before it ends.
Taxes, delivery, recycling charges and any lender promotional fees are excluded. Fees may add to the total borrowing cost. Additional discounts can change plan eligibility and the amount financed. Confirm the final purchase amount and applicable terms with the store before arranging financing.
Credit approval, applicable account terms and purchase eligibility apply.
How Synchrony deferred interest works
Est. $91.63/month for 24 months
Item-price payoff target · excludes taxes and fees.
Synchrony · No interest if paid in full within 24 months. Subject to credit approval.
Interest is charged from the purchase date if not paid in full in time. Minimum monthly payments are required and may not repay the balance in time.
This item price meets the 24-month deferred-interest threshold. We use the longest confirmed period available at this price. Avoiding interest requires paying the promotional balance in full before the deadline. Lender fees can affect total cost; this selection does not establish the lowest total borrowing cost.
This illustration divides the displayed price of $2,199.00 for one selected item by 24 months, rounding up to the next cent. It is not the lender’s required payment or billing schedule. Check the promotional deadline on your statement and pay the full promotional balance before it ends.
Taxes, delivery, recycling charges and any lender promotional fees are excluded. Fees may add to the total borrowing cost. Additional discounts can change plan eligibility and the amount financed. Confirm the final purchase amount and applicable terms with the store before arranging financing.
Credit approval, applicable account terms and purchase eligibility apply.
How Synchrony deferred interest works
Est. $92.42/month for 12 months
Item-price payoff target · excludes taxes and fees.
Synchrony · No interest if paid in full within 12 months. Subject to credit approval.
Interest is charged from the purchase date if not paid in full in time. Minimum monthly payments are required and may not repay the balance in time.
This item price meets the 12-month deferred-interest threshold. We use the longest confirmed period available at this price. Avoiding interest requires paying the promotional balance in full before the deadline. Lender fees can affect total cost; this selection does not establish the lowest total borrowing cost.
This illustration divides the displayed price of $1,109.00 for one selected item by 12 months, rounding up to the next cent. It is not the lender’s required payment or billing schedule. Check the promotional deadline on your statement and pay the full promotional balance before it ends.
Taxes, delivery, recycling charges and any lender promotional fees are excluded. Fees may add to the total borrowing cost. Additional discounts can change plan eligibility and the amount financed. Confirm the final purchase amount and applicable terms with the store before arranging financing.
Credit approval, applicable account terms and purchase eligibility apply.
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