Casper The One vs Saatva Rx
Detailed side-by-side comparison — pricing, specs, performance ratings, and our pick.
| Feature | Casper The One | Saatva Rx |
|---|---|---|
| Overview | ||
Type | Memory Foam | Hybrid |
Firmness 1 = softest, 10 = firmest | 6 / 10 | 5.5 / 10 |
Queen Price Current / sale price | $799 | $1,999 |
Trial Period Return window | 100 nights | 365 nights |
Warranty | 10 years | Lifetime |
| Performance Ratings | ||
Cooling Hot sleepers | Low | High |
Motion Isolation Partners, light sleepers | Excellent | Good |
Pressure Relief Hip/shoulder pain | Good | Excellent |
Edge Support Sit/sleep near edge | Fair | Excellent |
Durability Long-term performance | Good | Excellent |
| Compatibility & Features | ||
Adjustable Base Head/foot elevation | ✓ Yes | ✓ Yes |
Split King Support Two Twin XL per couple | ✓ Yes | ✓ Yes |
Dual Comfort Zones Different firmness per side | — | — |
Smart Features App, sensors, auto-adjust | — | — |
Financing | Affirm | Affirm |
| Materials & Safety | ||
Certifications Organic / non-toxic | CertiPUR-US | CertiPUR-US, GREENGUARD Gold |
Off-Gassing New-foam smell concern | CertiPUR-US certified foam | CertiPUR-US certified foam |
| Best For | ||
Ideal sleeper profiles |
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| Actions | ||
Need Help Deciding?
For most sleepers, we recommend the Saatva Rx over the Casper The One. It scores higher in pressure relief, edge support, durability and offers strong overall value at $1,999 (vs $799). The Casper The One is the better choice only if budget is paramount — it saves roughly $1200.
Casper The One vs Saatva Rx: What Actually Differs
The Casper The One is a memory foam build, while the Saatva Rx is a hybrid — that single difference drives most of the cooling, motion, and feel decisions below. The Saatva Rx stands 15" tall versus 11" for the Casper The One — a 4.0" gap that matters if you need deep-pocket sheets or are pairing with an adjustable base. Both sit at roughly 6/10 on the firmness scale — a medium-firm feel — so neither one is the answer if you need a dramatically different support level. The single largest performance gap is in edge support: the Saatva Rx rates noticeably higher than the Casper The One, which is the deciding factor if that dimension is high on your list. On a Queen, the Casper The One runs $799 versus $1,999 for the Saatva Rx — roughly $1,200 (60%) less, which is enough to factor into the decision unless the pricier model wins clearly on the specs you care about. Trial periods aren't symmetrical either: the Saatva Rx ships with a 365-night sleep trial versus 100 nights for the Casper The One, giving you a longer in-home runway to send it back if the feel doesn't land.
Which Is Better For Your Sleep Style?
Higher pressure-relief rating, which is what protects hip and shoulder contact points in the side position.
Firmness of 6/10 is closer to the medium-firm sweet spot back sleepers need for lumbar support (vs 5.5/10).
Firmer at 6/10 vs 5.5/10 — stomach sleepers need the extra support to keep the pelvis from sinking and arching the lower back.
Cooling rating not available for one or both mattresses — spec not available.
better long-term durability and stronger perimeter / edge support — the two specs heavier sleepers should weight most.
Softer at 5.5/10 vs 6/10 — lighter sleepers compress less, so they typically need the softer of two options to get proper contouring.
Higher motion-isolation rating, which means less disturbance when a partner moves or gets out of bed.
Price Comparison (Queen)
| Mattress | MSRP | Current | Sale? |
|---|---|---|---|
| Casper The One | $999 | $799 | Save $200 |
| Saatva Rx | $1,999 | $1,999 | At MSRP |
The Casper The One is the budget choice at $799 — $1,200 less than the Saatva Rx ($1,999). That's a 60% gap, which is worth weighing against the spec differences before deciding which delivers better value for your situation. Only the Casper The One is on sale right now.
Casper The One
Strengths
- ✓Zoned Support (shoulder/hip differentiation)
- ✓Solid motion isolation
- ✓Open-cell foam for breathability
- ✓100-night trial
Considerations
- —No active cooling
- —Fair edge support
- —All-foam (no coil bounce)
Saatva Rx
Strengths
- ✓Designed for back/joint pain relief
- ✓Patented lumbar zone support
- ✓365-night trial
- ✓Lifetime warranty
Considerations
- —Top-tier model in the lineup — premium specifications and materials compared to sibling models
- —Only one firmness level
- —Heavy at 15 inches
Who Should Buy Which?
Choose the Casper The One if you…
- →Couples / light sleepers
- →Budget-conscious shoppers
Choose the Saatva Rx if you…
- →Side sleepers / pressure relief
- →Sitting near the edge
- →Trial-period sensitive buyers
- →Organic / non-toxic priority shoppers