by Our Top Mattress Pick
Whatever sleep technology you use, it only works as well as the mattress underneath you. Saatva's handcrafted innerspring hybrid tops our testing for support, temperature regulation, and durability.
Three Smart Mattress Philosophies
The smart mattress category has consolidated around three distinct approaches, each solving sleep differently. Eight Sleep targets temperature regulation through active cooling and heating. Sleep Number targets personalized firmness through air-chamber adjustment. Saatva Solaire targets adaptive comfort through precision air control layered on a premium innerspring foundation.
None of these are cheap. The real question is which technology actually moves the needle on sleep quality for a meaningful number of people — and whether the ongoing costs make sense long-term.
Pros and Cons
What We Like
- Luxury innerspring with excellent lumbar support
- Multiple firmness options available
- Free white-glove delivery and mattress removal
- 365-night trial and lifetime warranty
What Could Be Better
- Higher price than many online brands
- Heavier than foam mattresses
- Not compressed in a box
- Some off-gassing possible initially
Eight Sleep Pod 4 (and Pro): Active Temperature Control
Eight Sleep's core innovation is the Pod Cover — a water-circulating pad that sits between your mattress and fitted sheet, and actively cools or heats each side of the bed independently to within 2-3 degrees Fahrenheit of your target temperature. The Pod 4 (2024) improves on previous generations with faster temperature changes and improved sensor accuracy.
Eight Sleep also embeds sensors that track heart rate, HRV, respiratory rate, and movement through the mattress surface — meaning sleep data without wearing a wearable. The Sleep Fitness score (0–100) and Autopilot feature can automatically adjust temperature across the night based on your sleep stage.
Cost: Pod Cover starts at $2,195 (queen, cover only, no mattress). The Hub subscription for advanced features costs $19/month or $199/year. You still need to buy a compatible mattress separately, making total investment easily $3,500–$6,000+.
What the evidence says: Eight Sleep's own studies and independent user reports consistently show improved deep sleep and reduced time awake — the company cites 34% more deep sleep on average. These are not blinded studies, but the temperature mechanism is physiologically sound: core body temperature must drop 1–2°F to initiate and maintain deep sleep, and active cooling accelerates that process.
Sleep Number 360 Smart Bed: Adjustable Firmness
Sleep Number's approach is different — it adjusts air pressure in dual chambers (one per sleeper) to achieve personalized firmness, measured on a 0–100 "Sleep Number" scale. The 360 Smart Bed line adds sensors for biometric tracking (breathing rate, heart rate, movement) and SleepIQ scoring.
Sleep Number has been at this longer than anyone — the company was founded in 1987 — and the air-chamber technology is genuinely mature. The 360 p6 and i8 models add lumbar support adjustment and responsive air technology that firms the mattress when it detects you're sitting on the edge.
Cost: Sleep Number 360 beds range from $1,499 (c2 Smart, queen) to over $6,000 for the i10 FlexFit 3 bundle. The SleepIQ app and basic tracking are included at no extra cost; Climate360 (active heating and cooling, available on select models) adds substantial cost.
What the evidence says: Firmness personalization is the most extensively validated variable in sleep quality research. Finding your optimal firmness genuinely reduces pressure points, improves spinal alignment, and correlates with better sleep continuity. Sleep Number's SleepIQ accuracy for sleep staging is comparable to other consumer trackers.
Saatva Solaire: Luxury Hybrid with Precision Air
Saatva Solaire combines a premium innerspring-and-memory-foam construction with dual-sided air-chamber adjustment in the top comfort layer. Each side adjusts in 50 firmness increments via the Saatva app, from ultra-soft to extra-firm, without the mattress feeling like a blown-up air bed at any setting.
Unlike Sleep Number's all-air construction, Solaire builds the air chambers on top of Saatva's standard innerspring foundation — meaning you get the support and durability of a quality coil system with the personalization of air adjustment. There's no ongoing subscription, no hub hardware, and no sensor ecosystem — just a premium mattress with app-controlled firmness.
Cost: Saatva Solaire starts at $2,695 for a queen. No subscription. No required companion hardware. White-glove delivery and old mattress removal are included in the price (a $100–$200 value most competitors charge for).
What the evidence says: The Solaire sits in the middle ground — not the active temperature tech of Eight Sleep, not the sensor ecosystem of Sleep Number, but a genuinely high-quality mattress that you can adjust to match either partner's needs. For couples with very different firmness preferences, it's the cleanest solution.
Side-by-Side Comparison
| Feature | Eight Sleep Pod 4 | Sleep Number 360 | Saatva Solaire |
|---|---|---|---|
| Active temperature control | Yes (water cooling/heating) | Climate360 models only | No |
| Firmness adjustment | No | Yes (0–100 scale) | Yes (50 increments per side) |
| Sleep tracking sensors | Built-in (no wearable needed) | Built-in (SleepIQ) | None |
| Monthly subscription | $19/mo or $199/yr | None (basic) | None |
| Starting price (queen) | ~$2,195 (cover only) | $1,499 | $2,695 |
| Trial period | 30 nights | 100 nights | 365 nights |
Our Verdict: Which Smart Mattress to Choose
For hot sleepers who run warm, Eight Sleep's active cooling delivers measurable deep sleep improvement and is worth the premium if the subscription model doesn't bother you. For couples with different firmness preferences, Saatva Solaire provides the cleanest implementation of dual-zone adjustment on a quality mattress without ongoing software costs. Sleep Number is ideal for those who want established technology and the SleepIQ ecosystem at a range of price points.
If you don't run hot and aren't in a couple with opposed firmness needs, a high-quality traditional mattress like the Saatva Classic often delivers equivalent sleep quality at lower total cost. Also see our best cooling mattress guide and sleep setup optimization guide for more context.
Our Top Mattress Pick
Whatever sleep technology you use, it only works as well as the mattress underneath you. Saatva's handcrafted innerspring hybrid tops our testing for support, temperature regulation, and durability.
Frequently Asked Questions
Is Eight Sleep worth the money?
Eight Sleep is worth the investment for people who run consistently warm during sleep and struggle with heat-related sleep disruption. The active cooling technology is physiologically sound and user-reported outcomes are strong. The ongoing subscription cost ($19/month) and reliance on water-circulation hardware add long-term considerations.
What is the Sleep Number SleepIQ score?
SleepIQ is Sleep Number's proprietary sleep score (0–100) measured by sensors built into the mattress. It tracks heart rate, breathing rate, and movement to estimate sleep quality without a wearable. Accuracy for sleep staging is comparable to wrist-worn trackers.
Can you use a regular mattress with Eight Sleep?
Yes, the Eight Sleep Pod 4 is sold as a cover that goes on top of your existing mattress. It requires a mattress between 9–13 inches thick and recommends memory foam or hybrid construction. You don't need to purchase Eight Sleep's own mattress.
How long does a Saatva Solaire last?
Saatva warrants the Solaire for 15 years, which is longer than most mattresses. The air chamber mechanisms are the components most likely to require service; Saatva offers repair rather than replacement in the first 15 years. The innerspring foundation should last 10–15+ years with normal use.
Which smart mattress has the best trial period?
Saatva Solaire offers 365 nights — a full year — which is the longest trial in the smart mattress category. Sleep Number offers 100 nights. Eight Sleep Pod offers 30 nights. Longer trials are especially important for expensive smart mattresses where the learning curve takes several weeks.