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    Comparison

    Sleepal vs Withings Sleep: Cost, Accuracy, Fit

    |8 min read
    D

    Dovy Paukstys

    Founder, Komori Care

    A bedside radar lamp versus an under-mattress pad. Different physics, different bills, different published studies. I am Dovy, founder of Komori Care. We are building a contactless bedside sleep monitor, coming 2027, wellness only.

    Quick answer

    3-year cost, if you keep Sleepal AI+ the whole time: Sleepal $399 device plus $69.99/yr = $608.97. Withings Sleep $199.95 with no subscription on the US product page. Run the same math in the sleep tracker cost calculator.

    • Sleepal AI Lamp is a bedside 60 GHz radar lamp. Use $399 as retail, cited to Tom's Guide. Other listed prices: $299 backer (Smart Home Scene), $449 Kickstarter launch (KR-Asia). AI+ is $5.99/mo or $69.99/yr on sleepal.ai/home. I am not stating a free-trial length. Sources conflict.
    • Withings Sleep is $199.95 on the US Sleep page. No subscription is shown there. The UK page is named Sleep Analyzer. I am describing the US consumer page only.
    • Published validation is not the same study. Sleepal: 1,022 adults versus PSG, 92.7% sleep/wake and 77.2% four-stage (Physiological Measurement). Withings: 117 healthy adults, home PSG, 87% sleep/wake and 63% four-stage (JMIR Human Factors 2026).
    • Who it suits. Want a lamp on the nightstand and radar you can buy now: Sleepal. Want a pad under the mattress and no subscription on the store page: Withings. Want no screen or light at the bedside, and tracking that does not need a phone in the room: Komori Care, coming 2027.

    The numbers live in one table on the sleep tracker validation scoreboard.

    Want a follow-up on this topic? Get a note when Komori launches (2027)

    One email when the contactless monitor ships, plus the occasional short follow-up on this topic. No spam, leave any time.

    3-year cost

    Sleepal's sticker is not one number. I use $399 because Tom's Guide published it as the review price. A backer price of $299 and a Kickstarter launch price of $449 also exist. Check the cart.

    AI+ is separate: $5.99/mo or $69.99/yr (sleepal.ai/home). Detailed sleep report, posture guidance, and the AI coach are AI+ only on that page. If you keep the yearly plan for three years: $399 + (3 x $69.99) = $608.97. That is not tax or shipping. It also assumes you pay AI+ every year. I am not subtracting a trial.

    Withings Sleep is $199.95 on the US store. No subscription is shown on that page. Three-year hardware cost in that framing: $199.95.

    Same formula as the cost calculator: sticker plus published fee times years. No invented fees.

    Published validation

    Do not stack these percentages as a winner. The studies are different.

    Sleepal. Peer-reviewed paper in Physiological Measurement: 1,022 adults versus in-lab PSG. Sleep/wake accuracy 92.7%. Four-stage accuracy 77.2%. Source: doi:10.1088/1361-6579/aeb104. A vendor preprint on the same work (arXiv 2604.16442) reports 92.8% sleep/wake and 78.5% four-stage in the Normal group, with 77.2% four-stage overall. Large N. Vendor-side authors. Not an independent trial.

    Withings Sleep. JMIR Human Factors 2026: 117 healthy adults, home PSG. Sleep/wake 87%. Four-stage 63%. Kappa 0.49. Smaller N, home setting, healthy cohort. Withings also wrote up the weak spots: overestimates light sleep by 1h21m, underestimates deep sleep by 46m (Withings post).

    Lab PSG on 1,022 adults is not the same design as home PSG on 117 healthy adults. Read the scoreboard and what "95% accurate" actually means before you treat either headline as a purchase rank.

    Setup and privacy

    Sleepal sits on the nightstand. Tom's Guide: plug in, scan a QR on the display, aim the head at your chest. The lamp has a screen and light. Sensors listed on sleepal.ai/home: 60 GHz radar, thermal, microphone, and environment sensors. A lamp at the bedside sees the room. If you want a dark nightstand, this is the wrong product.

    Withings Sleep is a pad you slide under the mattress. Nothing on the nightstand. No camera on the US product page. The sensor is in the bed, under the sleeper. Thick mattresses or toppers can make placement harder. One pad, one sleeper is the usual limit on this shelf.

    Privacy here is placement, not a slogan. A bedside lamp with a mic and a thermal sensor is a different object than a pad under the mattress. I am describing what the sources list, not scoring a winner.

    Who each one suits

    Sleepal if you want contactless radar you can buy now, you like a lamp and sunrise on the nightstand, and you will pay $399 (Tom's Guide) plus optional AI+ for the coach features. Verify what the app actually labels for posture before you treat it as a position timeline. See is the Sleepal AI Lamp worth it.

    Withings Sleep if you will put a pad under the mattress, you want the $199.95 US store price, and you want no subscription shown on the product page. It is the established under-mattress pick in our contactless comparison. Other mats: Withings Sleep Analyzer alternatives.

    Neither, if the job is a back/side/stomach timeline with no screen or light and no phone in the room. That is the Komori Care lane, and it is not for sale yet.

    Komori Care (coming 2027)

    Komori Care is coming in 2027. It is designed as a contactless bedside sleep-position monitor. No screen or light at the bedside. Designed to keep tracking without a phone in the room. General wellness only. Not a medical device. Join the waitlist.

    FAQ

    What is the 3-year cost of Sleepal vs Withings Sleep?

    Sleepal $399 (Tom's Guide) plus AI+ $69.99/yr (sleepal.ai/home) is $608.97 over three years if you keep AI+. Withings Sleep is $199.95 on the US store, with no subscription shown on that page. Use the cost calculator for the same formula.

    Is Sleepal more accurate than Withings?

    The published papers are not the same test. Sleepal's journal paper is 1,022 adults versus PSG: 92.7% sleep/wake, 77.2% four-stage. Withings is 117 healthy adults at home versus PSG: 87% sleep/wake, 63% four-stage. Different N, different setting, different cohort. See the validation scoreboard.

    Does either one need a subscription?

    Sleepal AI+ is $5.99/mo or $69.99/yr for the extra report and coach features. I am not stating a free-trial length. Withings Sleep shows no subscription on the US product page.

    Does Komori ship now?

    No. Coming 2027. Waitlist. For something tonight: Sleepal or Withings.

    Keep reading

    Komori Care is a contactless sleep monitor in development. Camera-free position tracking, coming 2027. Wellness only. Join the waitlist.

    Want a follow-up on this topic? Get a note when Komori launches (2027)

    One email when the contactless monitor ships, plus the occasional short follow-up on this topic. No spam, leave any time.

    Keep reading

    Want to see your sleep position data?

    Join the free waitlist for launch updates. Or lock in founder pricing with the Insider Pass ($49, credited toward your purchase).

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