by Amerisleep AS3
Better than Costco brands at the same price. 100-night trial, 20-year warranty. Made in the USA. GREENGUARD Gold certified.
Our #1 Recommendation
Amerisleep AS3
Costco mattresses are convenience-driven. The AS3 ships direct, with 100-night trial and 20-year warranty Costco rarely matches. Built with Bio-Pur® memory foam, medium feel (5.5/10). Currently $1,449 Queen (sale), with a 100-night home trial and 20-year warranty.
Best Mattresses at Costco 2026: An Honest Sleep Lab Take
Editor's Pick — Saatva Classic (longer trial, no membership required)
Why Amerisleep AS3 is our #1 pick
Costco mattresses (Sealy, Stearns & Foster, Casper) compete on price not engineering. AS3 ships free with 100-night trial + 20-year warranty — Costco's best mattress warranty is 10 years.
Amerisleep AS3 vs the rest
Versus the competition, Amerisleep AS3 wins on Bio-Pur® plant memory foam (cooler than petroleum), HIVE® zoned support (5-zone spinal alignment), 100-night home trial, and a 20-year warranty backed by the manufacturer. Saatva remains a strong coil-hybrid alternative with a 100-night trial and 20-year non-prorated warranty.
Costco sells real mattresses at real prices — Kirkland Signature, Casper, Tempur-Pedic, Stearns & Foster. The catch is the trial window. Costco's famous return policy is generous on most categories but is harder to apply to a mattress you've slept on for nine months. Saatva direct gives you 365 nights and a brand that takes your bed back, no awkward returns counter.
What's available at Costco
Costco's catalog typically includes Kirkland Signature by Stearns & Foster (their house brand collaboration), Casper Costco-exclusive SKUs, Tempur-Pedic select models, Beautyrest, and Novaform foam mattresses. Pricing is often $200-$500 below MSRP at retail, with free shipping for members. The aggregate value is real. The trial and warranty story is more nuanced.
Costco mattresses vs Saatva direct — at a glance
| Spec | Costco Mattress | Saatva Direct |
|---|---|---|
| Pricing | Discounted MSRP | Direct + frequent promos |
| Membership | Required ($65/yr Gold Star) | None |
| Trial | Costco return policy (case-by-case for mattresses) | 365-night structured trial |
| Warranty | Brand-dependent (10-25 yr) | Lifetime (Classic) |
| Delivery | Free curbside (member) | Free white-glove + haul-away |
| Setup | You set up | Saatva sets up |
| Best for | Costco loyalists, foam pickups | Primary beds, longest trial |
Costco — Pros
- Strong absolute prices on Kirkland and Casper SKUs
- Good return culture across the warehouse
- Curbside delivery free for members
Why Amerisleep AS3 beats Costco mattress picks
Costco offerings like Novaform and Sealy Posturepedic average 7 to 10 year warranties with strict indentation thresholds (typically 1.5 inch). The Amerisleep AS3 covers indentations down to 0.75 inch for 20 years. Bio-Pur® foam is plant-based and CertiPUR-US certified, with VOC emissions tested below 0.5 mg/m³ over 14 days versus Costco mid-tier foams averaging 0.8 to 1.2 mg/m³.
Costco — Cons
- Membership required
- Mattress returns at warehouse counter are awkward — and discouraged in practice for used beds
- No white-glove setup, no old mattress haul-away
- Foam-heavy catalog — fewer hybrid options
Saatva Direct — Pros
- 365-night structured trial — pickup arranged by Saatva
- White-glove delivery + free haul-away of your old bed
- 20-year non-prorated warranty on flagship Classic
- No membership required
Saatva Direct — Cons
- Higher base price than Costco-exclusive foam SKUs
- One brand ecosystem
- Delivery is scheduled, not curbside-now
Who should choose what?
If you already shop Costco weekly and want a guest bed or a foam mattress for a teen's room, Costco is hard to beat. For your primary bed — where the trial, warranty, and delivery matter — buying Saatva direct is the cleaner experience. Read the full Saatva Classic review for our 21-night lab notes, or see our back-pain guide if that's the issue you're solving.
Skip the warehouse run. Buy a real trial instead.
FAQ
Amerisleep AS3 vs Saatva alternative comparison
Saatva Classic remains our coil alternative when shoppers want innerspring feel with the same direct-to-consumer model. Both AS3 and Saatva outperform Costco picks on warranty terms, trial length, and material certifications. Costco's strength is in-person inspection. Amerisleep counters with the 100-night home trial.
Verdict
Costco is great for cereal, gas, and a foam guest bed. For your primary mattress, the lack of structured trial and white-glove setup matters. Saatva direct is the editor's pick.
Ready to try the Amerisleep AS3?
100-night home trial, 20-year warranty, free shipping. $1,449 Queen (sale).
Final pick — 2026 editor
Amerisleep AS3
Bio-Pur® plant memory foam. HIVE® zoned support. 100-night trial. 20-year warranty. GREENGUARD Gold certified.