Purple mattress

Purple vs Lull Mattress Comparison

Shopping for a new mattress can be confusing. We give you our sleeper recommendations for the Lull and Purple mattresses in this comparison.

Lull is an online mattress company that pours all of their ingenuity into one mattress – the highly rated, all-foam Lull mattress. The Purple brand is dominated by their market-disrupting Smart Comfort Grid made of hyper elastic polymer

We got a first-hand feel for the Purple and Lull mattresses during our mattress review process. Our takeaway? Both are quality mattresses with very different constructions, which is why we decided to put them head-to-head. We’ll compare the original Purple mattress and the signature Lull mattress by feel, construction, and cost to help you decide which is the right mattress for you.

Purple and Lull Overview

Customer Rating
MA Score
Trial Period


Customer Rating
MA Score
8.4 / 10

Proven pressure relief for people with back pain; good for back and side sleepers


Medium-firm: 6.5/10


Hybrid: hyper-elastic polymer and foam

Trial Period

100 days


10-year limited warranty


Customer Rating
MA Score
8.9 / 10

Universal memory foam mattress for the average sleeper


Medium-firm: 6.5/10


Gel memory foam mattress

Trial Period

100 days


10-year limited warranty

Key Similarities

  • Medium-Firm Feel: Both of these mattress models are medium-firm, or 6.5/10 on the firmness scale. This firmness level is a favorite with consumers because it is both soft and supportive.
  • Sleep Trial: Purple and Lull each give customers 100 days to test out their mattresses at home, so you’ll have plenty of time to make up your mind with either choice. It takes up to 30 days to adjust to a new sleeping surface, but 100 days will give you plenty of time to assess the compatibility of your mattress.
  • Warranty: Both companies also cover their mattresses with a 10-year warranty, and will ship you a replacement mattress if your original develops certain defects.

Key Differences

  • Comfort Layer: The most noticable difference between these mattresses is the comfort layer. Purple’s is a unique, gel-like grid that stretches with the shape of your body. The Lull mattress is topped with a simple, high-quality memory foam layer.
  • Motion Transfer: The widest performance gap between these beds came from our motion transfer evaluation. Lull’s foam layers isolate motion better than Purple’s Comfort Grid and foam combo.
  • Variety: Lull only offers one mattress that is all-foam and medium-firm. Purple offers 3 mattress models with 4 firmness levels: the medium-firm original Purple mattress, the slightly firmer Purple Hybrid, and the medium to medium-soft Purple Hybrid Premier.
  • Availability: Lull mattresses are sold exclusively online at the Lull website and Amazon, and are delivered bed-in-a-box style. Purple is sold online, but also at retailers across the country. You can test the feel of Purple beds in store, and get free white glove delivery on mattresses over 150lbs or Hybrid Premier models ordered directly from Purple.
Purple mattress

Purple Review Highlights

  • Smart Comfort Grid: The original Purple mattress is known for its innovative hyper elastic polymer top layer. It’s designed to give you superior pressure relief. In fact, the Smart Grid can cushion a raw egg under 1,400lbs of pressure!
  • Sleeps Cool: The Purple Smart Grid features hundreds of hollow channels that easily allow warm air to flow through the breathable mattress cover. Plus, hyper elastic polymer is similar to gel, which is known for its temperature regulating properties. 
  • Spinal Alignment: We gave the Purple mattress a near-perfect score for spinal alignment. It will keep your back in a neutral position while you sleep, which prevents back pain and gives you the sensation of floating.
  • Durability: All of the materials used in the Purple mattress are made to last. Hyper elastic polymer is slower to break down than other common mattress materials. That’s partly why we consider the Purple to be a top hybrid mattress.
  • Certipur-US Certified: The foams in all Purple beds are certified for low emissions and non-toxic chemicals, so they don’t have an off-gassing scent. They are also hypoallergenic and subject to US standards for sourcing and manufacturing.
Lull mattress on a wooden bed frame

 Lull Review Highlights

  • Spinal Alignment: The Lull mattress earned top marks for spinal alignment. For this reason, we consider it one of the best mattresses for side sleepers.
  • Pressure Relief: Lull also received high scores for pressure relief, which is another important factor for side sleepers. The memory foam top layer cushions pressure points, so you wake up without tension in your shoulders and hips.
  • Motion Isolation: The memory foam layers also diffuse motion before it crosses the mattress surface. You’ll notice less disruptions from partners, pets, and children if they move around at night on the Lull mattress.
  • Edge Support: Good edge support means that you can stretch out or sit on the edges of your mattress without sinking down or rolling off. Lull earned particularly good marks in this category, with a score of 9.25/10.
  • All-Inclusive: A wise person once said that less choices equals greater contentment. Lull pours all of their tricks of the trade into this one mattress, so you get maximum comfort without the stress of deciding between multiple models.

Compare Mattress Sizes

Take a look at how the Purple and Lull mattress sizes compare in the chart below.

Purple Lull
Thickness 9.25” 10”
Twin 38” x 75” 38″ x 75
Twin XL 38” x 80” 38″ x 80″
Full 54” x 76” 54″ x 75″
Queen 60” x 80” 60″ x 80″
King 76” x 80” 76″ x 80″
California King 72” x 84” 72″ x 84″

Learn more about mattress sizes.

Compare Prices

Check out the price difference for each size of the Purple and Lull mattresses. Both companies offer financing for customers.

Purple Lull
Twin $599 $649
Twin XL $799 $699
Full $999 $849
Queen $1,149 $949
King $1,449 $1,149
California King $1,449 $1,149

Compare the Inside Layers

Next, we’ll take a look at what these beds look like on the inside and how their construction creates greater comfort.

Inside the Purple mattress

Inside the Purple Mattress

  • Mattress Cover: Purple uses a blend of polyester, viscose, and lycra in their extra flexible mattress cover and non-slip bottom. It’s designed to stretch with the top layer, enabling your body to fully sink into the supportive Smart Grid.
  • SmartGrid: The Smart Comfort Grid can comfortably support most body types (although heavier sleepers may want to try a firm mattress like the Purple Hybrid). The waffle-like shape cushions every nook and cranny of your form, providing pressure relief to high impact areas like shoulders and hips.
  • Transition Layer: Purple’s second layer has a medium-soft feel. It’s made from high-quality polyfoam that is equally responsive and contouring.
  • Support Foam: The final foam layer is also polyfoam. It’s extra dense, which makes the mattress durable and prolongs the “new bed” feel.

Inside the Lull Mattress

  • Mattress Cover: Lull uses a soft, breathable polyester-rayon blend for their mattress cover. They recommend adding their breathable mattress protector on top to keep the cover clean without dampening the cooling effect of the gel top layer.
  • Gel Memory Foam: Lull’s comfort layer is 1.5” of memory foam that is infused with cooling gel. Lull chose a foam that is extra responsive, so you get the contouring support of memory foam without feeling stuck in your mattress.
  • Transition Foam: The transition layer is 1.5” of proprietary support foam that is designed to keep your spine aligned.
  • Support Layer: Lull’s base layer is 7” of polyurethane foam that prevents sinkage and sagging.

Compare Mattress Advisor Scores

Here’s how each of these mattresses performed in our comprehensive mattress review process. The final scores are a weighted total of all 14 categories. 

Purple Lull
Shipping 7 10
Trial Period 9 9
Return Policy 10 10
Warranty 9 9
Set-Up Test 6 8.5
Motion Transfer Test 7.5 9
Edge Support Test 8.5 9.25
Pressure Relief Test 8.5 9
Spinal Alignment Test 9.5 9.5
Responsiveness Test 7 8
Cooling Evaluation 8 7.5
Durability Evaluation 9 8
Customer Service Score 9 10
Social Impact Score 4 5
TOTAL SCORE 8.4/10 8.9/10

Sleeping Position

Most people change position throughout the night, but can identify a dominant sleeping position. If you are primarily a side sleeper, pay special attention to the scores for pressure relief, since they indicate how well a bed supports the contouring of your body. Purple and Lull both scored very high in this category, with Lull earning 0.5 point more than Purple.

Responsiveness is an important factor for combo sleepers. It is measured by how quickly the mattress surface responds to changes in your position. Purple scored average in this category: 7/10. Lull received an above average score: 8/10 – so if you have a tendency to toss and turn, the Lull may be a better fit.

Spinal alignment is important for all sleep positions. Our spinal alignment test measures how well a mattress sustains good posture. The Purple and Lull mattresses scored the exact same in this category – a near-perfect 9.5/10. Back, side, and stomach sleepers will experience excellent support on both beds.


If you sleep with a partner or pet, a mattress that scores high for motion isolation is important for getting uninterrupted sleep. We conducted a motion transfer test on both of these beds, which measures how well the mattress surface isolates movement. Purple scored an average 7.5/10, and Lull scored 9/10, so Lull is better for couples and light sleepers.

Those who sleep hot should pay attention to the cooling scores. Lull earned an average score in this category, which is typical for a memory foam mattress. The gel-infused top layer adds an extra boost of cooling, but hot sleepers will likely feel a little more comfortable on the Purple.


Fortunately, neither of these models will break the bank if you’re willing to invest a little more in a durable mattress. With that said, Lull mattresses are $50-$300 cheaper than original Purple mattresses. The cost difference is smaller for Twin, Twin XL, and Full sizes. Both companies offer financing and occasional discounts if you can’t swing the standard price point

Verdict: Which Mattress is the Winner?

We recommend the original Purple mattress for side sleepers, back sleepers, and those who get hot at night. The Lull mattress works for all sleep positions, particularly stomach sleepers, as well as cost-conscious shoppers, couples, and combo sleepers. The sleep trials and warranties for these models are the same.

It’s also worth noting that Lull is a safer choice for cautious shoppers because Purple’s Smart Grid is unique and takes getting used to. Lull has a more familiar memory foam feel, but if you’re interested, you can test out Purple beds at hundreds of retail stores in the USA. We love both of these mattresses, and whichever you choose, we’re confident that you’ll share our enthusiasm!

 More Purple and Lull Comparisons

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