Leesa vs Casper: Which Should You Buy?

Both were US brands that entered Britain during the boxed mattress boom, and both were built on the same proposition: an all-foam mattress sold direct, in a box, with a long trial and a ten year guarantee.

If you own one and are replacing it, the table at the bottom is what you came for. If you are still weighing them up, the comparison has expired, and the more useful question is what their departure tells you about the next mattress you buy.

Four brands, one pattern

All four sold ten year guarantees on a product expected to last eight to fifteen years. None of them was a bad mattress. The problem was never the foam.

What this should teach you about buying a mattress

A mattress is an eight to fifteen year purchase and a young mattress brand is frequently a much shorter proposition. That mismatch is the lesson here.

A guarantee is only worth the company behind it. A ten year guarantee from a brand that is liquidated in year three is worth nothing, whatever the certificate says.

Your statutory rights sit with the retailer, not the manufacturer. Under the Consumer Rights Act 2015 you can claim against whoever sold it to you for up to six years in England, Wales and Northern Ireland, and five in Scotland. That is why buying through an established third party splits the risk, where buying direct concentrates it in one company.

Check the trading entity at Companies House. It is free, it takes two minutes, and it tells you how long the company has traded and whether accounts are filed.

Keep the proof of purchase. After the first six months the burden of proof shifts to you.

None of this means avoid new brands. It means weigh the guarantee at what it is actually worth, and prefer construction you can verify today over promises about year eight.

If you already own one

Your statutory rights are against the retailer, not the manufacturer. Under the Consumer Rights Act 2015 goods must be of satisfactory quality and last a reasonable length of time, and you have up to six years to bring a claim in England, Wales and Northern Ireland, five in Scotland.

So if you bought through a department store or a marketplace that is still trading, that is who you approach, and the brand's disappearance does not extinguish the claim. If you bought direct from the brand, there is generally no one left to claim against.

Keep the proof of purchase and the date. After the first six months the burden of proof shifts to you, so photographs and an independent assessment help.

Citizens Advice is the right starting point for a specific situation. This is general information rather than legal advice.

What to check on the next one

How long has the company traded? Free to check at Companies House in two minutes, along with whether accounts are filed.

Are you buying direct or through a retailer? Direct usually buys more mattress per pound and concentrates both risks in one company. A third party splits them.

Is the specification published? Depth, spring count for your size, whether springs are pocketed or linked, and foam density. A brand that publishes those is one you can judge today rather than trusting about year eight.

Is the construction verifiable? A deep pocket spring core is a physical fact. A ten year guarantee is a promise about a company.

That last distinction is the whole lesson of this page: prefer construction you can verify now over promises about a decade away.

What to buy instead

Where to go next

How this list is made, and who made it

Who writes this. Kyle Klinkradt has worked in the mattress and bedding industry for over ten years across retail, distribution and brand partnerships, and has handled, sold or assessed products from every major UK bed-in-a-box brand. Every review on this site is written by one person, so the scores mean the same thing from page to page.

What the assessment is. Construction specifications against what they physically do: spring height and where in the mattress it sits, spring count for the size, gauge, whether the base is sprung or foam, foam density where it is published, comfort layer depth and material. Then the commercial terms that decide what you are actually buying: trial against returns policy, guarantee length against the company's UK trading history at Companies House, and the regulatory record.

What it is not. This is not a laboratory. I do not publish pressure-mapping data or claim to have slept eight years on every mattress here, because nobody has and pages that imply otherwise are not telling you the truth. Where a judgement rests on construction rather than long-term use, the review says so.

What gets a product removed. Leaving the UK market, a specification change that makes the review inaccurate, or a corrected fact. Brands that have withdrawn are kept on the site with the score removed rather than quietly deleted, because people still search for them.

See editorial independence, corrections and the author page.

How this comparison is made

Both products are scored on the same criteria used across this site: support, pressure relief, motion isolation, edge support, temperature, durability and value. The scores in the table are the ones on each product's own review page, and they do not change to suit a comparison.

Where a brand publishes a specification, it is quoted. Where it does not, that is stated rather than estimated, because an absent specification is itself information: foam density and spring count for your own size are the two most commonly withheld.

Prices move constantly in this category and both brands discount heavily, so cash prices are given as a guide and the comparison rests on construction rather than on a percentage off.