Eight Sleep vs Sleep Number vs Casper: Smart Mattresses Compared

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Quick Comparison Table

Introduction

The smart mattress market has evolved significantly, with three major players offering distinct approaches to technology-enhanced sleep. For the full range of mattress options, see our best mattresses guide. Eight Sleep focuses on active temperature regulation and biometric tracking. Sleep Number builds its brand around adjustable firmness through air chamber technology. Casper, originally a bed-in-a-box pioneer, has integrated smart features more modestly while emphasizing comfort engineering.

This comparison examines how each brand’s 2026 flagship models stack up across key decision factors: smart features, comfort technology, pricing, trial periods, and long-term ownership costs.

Eight Sleep Pod 4

Overview

Eight Sleep’s Pod 4 is the company’s most advanced sleep system to date. The core innovation remains active temperature regulation: the mattress uses a water-based system to heat or cool each side of the bed independently, ranging from 55 to 110 degrees Fahrenheit. The 2026 model features improved sensors, quieter operation, and enhanced AI-driven temperature adjustments.

Smart Features

Temperature Regulation: The Pod 4’s defining feature. The Active Grid technology circulates water through the mattress cover, allowing each sleeper to set their preferred temperature. The system can adjust automatically throughout the night based on biometric data, cooling down during deep sleep phases and warming up before the alarm.

Sleep Tracking: Built-in sensors track heart rate, heart rate variability (HRV), respiratory rate, time spent in each sleep stage, tosses and turns, and snoring detection. Data is presented through the Eight Sleep app with daily sleep fitness scores.

Autopilot AI: The optional Autopilot feature uses machine learning to optimize temperature settings based on individual sleep patterns, room temperature, and biometric data. It learns preferences over time and makes automatic adjustments.

Smart Alarm: Wakes users during the lightest sleep phase within a customizable window, aiming to reduce grogginess.

Comfort & Construction

The Pod 4 is a foam-based mattress (available in various firmness levels) paired with the Active Grid cover. The mattress itself uses multiple layers of polyurethane and memory foam. Comfort reviews generally rate it as medium-firm. The Active Grid cover adds a slight plushness to the surface.

Subscription Model

Eight Sleep offers an optional Autopilot AI subscription at $19 per month or $180 per year. Without the subscription, users can still manually control temperature and view sleep data, but they lose the AI-driven automatic adjustments and advanced analytics.

Pricing (2026)

• Pod 4 Cover Only (Queen): $1,499 (fits existing mattress)
• Pod 4 Mattress + Cover (Queen): $2,499
• Pod 4 Ultra (Queen): $3,999 (enhanced cooling, additional sensors)
• Sizes: Full through California King

[Affiliate Link: Eight Sleep Pod 4]

Pros and Cons

Pros:
– Best-in-class active temperature regulation
– Comprehensive sleep tracking without wearable devices
– Dual-zone temperature for couples
– Regular software updates add features
– Cover-only option available for existing mattresses

Cons:
– Autopilot AI requires ongoing subscription
– Hub unit requires placement near the bed
– Higher total cost of ownership with subscription
– Limited firmness options (foam-based, not adjustable)
– Setup is more complex than standard mattresses

Sleep Number 360 p6

Overview

Sleep Number has been a pioneer in adjustable-firmness mattresses since the 1990s. The 360 p6 is the company’s upper-mid-range smart mattress, combining adjustable air chambers with SleepIQ technology for sleep tracking and responsive adjustments. The 2026 model integrates improved sensors and a refined app experience.

Smart Features

Adjustable Firmness: The core Sleep Number experience. Each side of the mattress uses an air chamber that can be inflated or deflated to a “Sleep Number” setting between 1 and 100. This allows each partner to select their ideal firmness level independently.

SleepIQ Technology: Built-in sensors track sleep duration, restfulness, heart rate, and breathing. The system provides a daily SleepIQ score (0-100) with insights about sleep quality. The 2026 version includes improved accuracy and more detailed sleep stage breakdowns.

Responsive Air Technology: The mattress automatically makes micro-adjustments to firmness in response to body position changes, maintaining consistent support as sleepers shift throughout the night.

Snoring Detection and Response: When the system detects snoring, it can automatically raise the head of the mattress slightly (when paired with an adjustable base) to open airways.

Comfort & Construction

The p6 uses a combination of the proprietary air chamber system, memory foam layers, and a plush Euro pillow top. The adjustable firmness is the standout comfort feature, allowing sleepers to fine-tune support. The p6 leans toward a plush feel even at higher Sleep Number settings, which may not suit those who prefer very firm surfaces.

Subscription Model

Sleep Number does not require a subscription for any core features. SleepIQ tracking, responsive air adjustments, and snoring detection are all included in the purchase price.

Pricing (2026)

• 360 p6 (Queen): $2,799
• 360 p6 with adjustable base (Queen): $3,899-$4,499
• Optional DualTemp layer: $499 per side (add-on heating/cooling)
• Sizes: Twin XL through California King

[Affiliate Link: Sleep Number 360 p6]

Pros and Cons

Pros:
– Adjustable firmness suits a wide range of preferences
– No subscription required for any features
– Excellent for couples with different firmness preferences
– Long 15-year limited warranty
– Snoring response feature (with adjustable base)

Cons:
– No built-in temperature regulation (requires DualTemp add-on)
– DualTemp add-on increases cost significantly
– Air chambers create a slightly different feel than traditional mattresses
– Setup requires assembly (not a single-piece mattress)
– Pump/motor creates occasional noise during adjustments

Casper Nova Hybrid

Overview

Casper’s Nova Hybrid represents the brand’s premium comfort offering with modest smart features. Unlike Eight Sleep and Sleep Number, Casper does not build extensive technology into the mattress itself. Instead, the smart ecosystem is more limited, focusing on comfort engineering with optional connected devices.

Smart Features

App Integration: The Casper app provides sleep tips and basic tracking when paired with Casper devices. However, the Nova Hybrid itself does not have built-in sleep tracking sensors.

Casper Glow Light: A separate smart light device ($129) that helps regulate sleep-wake cycles with gradually dimming and brightening light. It integrates with the Casper app but is not included with the mattress.

Casper Hub: The 2026 Casper ecosystem is more focused on comfort than technology integration. The brand has positioned itself as a premium comfort company first, with smart features as supplementary rather than core.

Comfort & Construction

The Nova Hybrid uses a combination of memory foam, latex-like polymer, and pocketed springs. It is widely regarded as one of the most comfortable bed-in-a-box mattresses available. The zoned support system provides targeted pressure relief, with softer foam under the shoulders and firmer support under the hips and lower back.

The hybrid construction (foam + springs) provides a responsive, bouncy feel that many sleepers prefer over all-foam alternatives. Edge support is strong, and the mattress sleeps relatively cool due to the coil system’s airflow.

Subscription Model

No subscription is required or offered. All features are included in the purchase price, though the smart features are limited compared to competitors.

Pricing (2026)

• Nova Hybrid (Queen): $1,695
• Nova Hybrid Max (Queen): $2,295 (additional foam layers for plush feel)
• Casper Glow Light: $129 (optional)
• Sizes: Twin XL through California King

[Affiliate Link: Casper Nova Hybrid]

Pros and Cons

Pros:
– Most affordable option of the three
– Excellent comfort engineering with zoned support
– Hybrid design sleeps cooler than all-foam options
– Simple setup (arrives in a box)
– No subscription costs ever
– Strong edge support

Cons:
– No built-in temperature regulation
– No adjustable firmness
– Limited smart features compared to Eight Sleep and Sleep Number
– Sleep tracking requires separate wearable or device
– Not truly a “smart mattress” in the same category as the others

Head-to-Head Comparison

Temperature Regulation

Winner: Eight Sleep Pod 4. Active temperature regulation is Eight Sleep’s core competency, and the Pod 4 delivers the most sophisticated heating and cooling system available in a mattress. Sleep Number offers temperature management through the DualTemp add-on, but it is an additional cost. Casper offers no temperature features.

Adjustable Firmness

Winner: Sleep Number 360 p6. The adjustable air chamber system allows precise firmness control on each side of the bed. This is a feature that neither Eight Sleep nor Casper can match. For couples with significantly different firmness preferences, Sleep Number is the clear choice.

Sleep Tracking

Winner: Eight Sleep Pod 4. Eight Sleep’s built-in sensors provide the most comprehensive biometric data, including HRV, respiratory rate, and detailed sleep staging. Sleep Number’s SleepIQ is solid but less detailed. Casper does not offer built-in tracking.

Comfort

Winner: Tie between Casper Nova Hybrid and Sleep Number 360 p6. The Casper Nova Hybrid is widely praised for its out-of-the-box comfort. Sleep Number offers the flexibility to adjust firmness to personal preference. The best choice depends on whether adjustable firmness or refined foam engineering is more valued.

Value

Winner: Casper Nova Hybrid. At $1,695 for a queen, the Casper is significantly less expensive than both the Eight Sleep ($2,499+) and Sleep Number ($2,799+). For sleepers who do not need advanced smart features, the Casper offers the best comfort-to-price ratio.

Long-Term Cost of Ownership

Winner: Sleep Number 360 p6. Despite the higher purchase price, Sleep Number has no subscription requirements and the longest warranty (15 years). Eight Sleep’s optional Autopilot subscription adds $180-$228 per year. Casper has the lowest upfront cost but also the shortest warranty (10 years).

Who Should Choose Each Mattress

Choose Eight Sleep Pod 4 if:

• Temperature regulation is the top priority
• Comprehensive sleep tracking is desired without a wearable
• Couples have different temperature preferences
• You value AI-driven automatic adjustments
• Budget allows for the premium price point and optional subscription

Choose Sleep Number 360 p6 if:

• Adjustable firmness is essential
• You and your partner have very different firmness preferences
• You want smart features without subscription fees
• Snoring is a concern (especially with adjustable base)
• You prefer the longest warranty coverage

Choose Casper Nova Hybrid if:

• Comfort is the primary concern, not technology
• Budget is a significant factor
• You prefer a simpler sleep experience without apps and sensors
• You like the hybrid foam-and-spring feel
• You sleep hot and benefit from the coil airflow design

FAQ

Does the Eight Sleep Pod require a subscription?

No, the core features of the Eight Sleep Pod (manual temperature control, basic sleep data) work without a subscription. However, the Autopilot AI feature, which automatically adjusts temperature based on biometric data, requires a subscription at $19/month or $180/year.

How does Sleep Number’s adjustable firmness work?

Sleep Number mattresses use air chambers that can be inflated or deflated using a remote or app. Each side of the mattress has its own chamber, allowing couples to set different firmness levels (from 1, softest, to 100, firmest). The pump is housed in the mattress and makes occasional low-level noise during adjustments.

Is the Casper Nova Hybrid really a smart mattress?

The Casper Nova Hybrid has limited smart features compared to Eight Sleep and Sleep Number. It does not have built-in sensors or temperature regulation. The “smart” aspect comes from optional connected devices like the Casper Glow Light. It is best thought of as a premium comfort mattress with optional smart accessories.

How noisy are these smart mattresses?

Eight Sleep’s Pod 4 Hub produces a low hum when actively heating or cooling, similar to a white noise machine. Sleep Number’s pump makes brief noise when adjusting firmness. The Casper Nova Hybrid is completely silent. Most users report adapting to the ambient noise quickly.

Can I use my own mattress with Eight Sleep?

Yes. Eight Sleep offers the Pod 4 Cover as a standalone product ($1,499 for queen) that fits over most existing mattresses. This is a good option for those who want temperature regulation and sleep tracking without replacing their current mattress.

What happens during a power outage?

During a power outage, Eight Sleep loses temperature regulation and tracking (the mattress reverts to ambient temperature). Sleep Number loses the ability to adjust firmness, but the current air pressure is maintained. Casper is unaffected since it does not rely on power.

Are these mattresses returnable?

Yes. Eight Sleep offers a 30-night trial, Sleep Number offers 100 nights, and Casper offers 100 nights. All three have return policies, but the specifics vary. Eight Sleep’s shorter trial period is worth noting for those who want more time to evaluate. Return shipping and pickup logistics differ by brand.

Do smart mattresses require special bed frames?

Most smart mattresses work with standard bed frames. However, Sleep Number benefits from its own adjustable base for full feature access (snoring response, head elevation). Eight Sleep’s Hub unit needs to be placed near the bed and requires a power outlet within reach. Casper works with any standard frame or foundation.

Written by the Complete Wellness Hub Editorial Team. Last updated April 2026. Product prices and availability are subject to change.