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Key takeaways
- The SNOO has FDA De Novo authorization (DEN210039) to facilitate a back-sleeping position, for babies from birth to 6 months who can't roll over consistently.
- The FDA's summary says the SNOO is demonstrated to facilitate a supine position but has not directly demonstrated a reduction in the incidence of SIDS or SUID.
- Cradlewise's product and certifications pages list CPSC and ASTM standards but state no FDA authorization, and we found none.
- The SNOO is outgrown at 6 months, 33 lb or pushing up on hands and knees. Cradlewise lists use up to 24 months and 33 lb, with a move out of bassinet mode around 5 months or 18 lb.
- The AAP says to avoid commercial devices that claim to reduce SIDS risk, because there is no evidence any do. Back sleeping on a firm, flat surface in your room is the plan with either one.
At a glance
Happiest Baby SNOO
Suits: Families who want a motorized bassinet for the first months, with FDA De Novo authorization for keeping a baby on their back, and who are fine with a 6-month limit or a rental.
- Strength: FDA De Novo authorization (DEN210039) for facilitating a back-sleeping position
- Strength: Rental is available through Happiest Baby and authorized partners
- Strength: Used with a Sleep Sack that clips to the bed, which keeps baby on their back
- Trade-off: Stop at 6 months, 33 lb or when baby pushes up on hands and knees, whichever comes first
- Trade-off: The FDA says it has not directly demonstrated a reduction in SIDS or SUID
- Trade-off: You need another sleep space afterward
Cradlewise Smart Crib
Suits: Families who want one smart sleep space from birth through toddlerhood, with a built-in camera, and who'd rather buy once than rent.
- Strength: Converts from bassinet to crib, listed for birth to 24 months and up to 33 lb
- Strength: Built-in camera and sound machine
- Strength: Maker lists CPSC bassinet rule 16 CFR 1218 and the ASTM standards for bassinets and cribs
- Trade-off: We found no FDA authorization for it
- Trade-off: Needs WiFi for the app, and a yearly plan after the first 2 years for some features
- Trade-off: 88 lb and 40 by 25 inches, so it's a big piece of furniture
The SNOO and the Cradlewise smart crib both rock or bounce a baby back toward sleep, but they're built differently. The SNOO is a bassinet for roughly the first 6 months, with an FDA De Novo authorization for keeping a baby on their back. Cradlewise is a bassinet that converts to a crib, listed for use up to 24 months. If you're weighing Cradlewise vs SNOO, the biggest differences are FDA status, how long you can use each, and whether you rent or buy.
This page compares them from the makers' pages, the FDA's decision summary and federal and AAP safe sleep guidance. We research products; we don't test them, and we don't list prices. Our best bassinets guide covers non-smart options.
Cradlewise vs SNOO at a glance
| Model | Intended use | Stop using | Maximum weight | Restraint | FDA status | Power | Where to buy |
|---|---|---|---|---|---|---|---|
| Happiest Baby SNOO Smart SleeperMotorized smart bassinet | Birth to 6 months, until baby can roll over consistently | When baby can push up on hands and knees, or at 6 months, whichever comes first | 33 lb | Sleep Sack clips to built-in safety clips | De Novo authorization for facilitating a back-sleeping position; not shown to reduce SIDS/SUID (maker statement) | Plug-in motorized rocking | Check on AmazonAffiliate link |
| Cradlewise Convertible Smart Bassinet & CribMotorized convertible bassinet and crib with camera | Birth to 24 months, up to 33 lb | Not stated | Not stated | Not stated | None stated on the maker's product or certifications pages | Not stated | Check on AmazonAffiliate link |
| Happiest Baby SNOO | Cradlewise Smart Crib | |
|---|---|---|
| Type | Motorized bassinet with Sleep Sack | Smart bassinet that converts to a crib |
| Intended use | Birth to 6 months, before baby can roll over consistently [1] | Birth to 24 months, up to 33 lb [3] |
| Stop using when | Pushes up on hands and knees, 6 months, or 33 lb, whichever is first [1][2] | Bassinet mode: around 5 months or 18 lb, or hands and knees; manual sets crib limits [3] |
| FDA status | De Novo, Class II, DEN210039 [1] | None stated; none found |
| Camera | Not part of the FDA-authorized device | Built-in camera and sound machine [3] |
| Safety standards the maker lists | Not listed on the pages we checked [2][6] | ASTM F2194 and 16 CFR 1218 (bassinets), ASTM F406 and 16 CFR 1220 (non-full-size cribs), ASTM F2933 (mattresses) [4] |
| Rent or buy | Both; rental through Happiest Baby or partners [6] | Buy; financing and a 60-night trial listed [3] |
| Plan or app fees | Free Premium subscription with purchase (9 months) or rental [6] | Nurture Core free for 2 years on new cribs, then a yearly plan [3][5] |
| Connection | WiFi app | WiFi required for the app, 2.4 and 5 GHz [3] |
Is the SNOO FDA approved?
The SNOO has an FDA De Novo authorization, which creates a new device type. The FDA defines it as an "infant supine sleep system," Class II, under 21 CFR 880.5690. The De Novo request was received September 20, 2021 [1].
The FDA's indication says the SNOO bassinet and the SNOO Sleep Sack are "jointly intended to facilitate a supine position during sleep." It is for home use by caregivers of infants from birth to 6 months who are not yet able to roll over consistently [1].
Then the limits, in the FDA's words [1]:
"The SNOO is demonstrated to facilitate a supine position during sleep; however, the SNOO has not directly demonstrated a reduction in the incidence of SIDS/SUID."
It also says not to use the SNOO if the infant can push up on hands and knees, can roll over consistently, or has reached 6 months, and that the device is not a substitute for adult supervision [1]. Happiest Baby lists a maximum weight of 33 lb [2]. The Sleep Sack comes in three sizes, from 5 to 25 lb [1].
Is Cradlewise FDA approved?
We found no FDA authorization for Cradlewise. Its product page and its certifications page list CPSC and ASTM standards and a third-party verification from the Baby Safety Alliance, and neither mentions the FDA [3][4]. We also didn't find a De Novo decision for Cradlewise in our search.
That isn't a safety finding. A crib or bassinet doesn't need FDA authorization to be sold, and Cradlewise doesn't claim it. It does mean Cradlewise can't point to the kind of FDA indication the SNOO has. Ask Cradlewise directly if this matters to you.
How long does each last?
This is the largest practical gap.
- SNOO: from birth to 6 months at most. The limit is whichever comes first: pushing up on hands and knees, 6 months, or 33 lb [1][2]. After that you need another sleep space, such as a crib. Our crib vs bassinet guide covers the switch.
- Cradlewise: listed for 0 to 24 months and up to 33 lb. In bassinet mode, Cradlewise says babies typically move to crib mode around 5 months or 18 lb, or when they can push up on hands and knees, whichever comes first [3]. Read the manual for the crib-mode limits.
Neither maker's limit is a developmental promise. Babies reach milestones at different times, so move up when the label's limit or milestone arrives, not when the calendar says so.
Rent or buy
Happiest Baby says SNOO rentals are ordered directly from it or from an authorized partner, and that renters get the free Premium subscription for the rental period plus one month [6]. Buyers after July 15, 2024 get it free for 9 months [6]. Renting suits a bed you'll only use for a few months.
We didn't find a rental program on Cradlewise's pages. It lists financing, a 60-night trial that starts on the baby's first night, and HSA/FSA eligibility [3]. After the 2 free years of Nurture Core, it lists a yearly plan. Check the plan page for the current terms [5].
What federal rules apply?
Bassinets sold in the U.S. must meet the CPSC's bassinet and cradle rule, 16 CFR 1218, which incorporates ASTM F2194 [7][8]. The CPSC describes a bassinet as a small bed for infants whose sleep surface can't tilt more than 10 degrees from horizontal at rest [8]. Cradlewise states that it meets 16 CFR 1218 for bassinets and 16 CFR 1220 for non-full-size cribs [4]. The rule applies to every bassinet, smart or not, so a smart label doesn't change the baseline.
What the AAP says about smart sleepers
The AAP's advice is the same for both:
- Put your baby on their back for every sleep, on a firm, flat surface, with a fitted sheet and nothing else [9].
- Room-share without bed-sharing, ideally for at least the first 6 months [9].
- Avoid commercial devices that claim to reduce SIDS risk. The AAP says there is no evidence that any of these devices reduce these deaths, and that they may give a false sense of security [10].
So treat either bed as a place to sleep, not a safety system. The FDA's own SNOO language and the AAP's are consistent on this [1][10].
Who each one fits
The SNOO may fit if you want a bed for the first 6 months, are comfortable with a rental, and want the FDA-authorized back-sleeping design. Cradlewise may fit if you'd rather buy one product for birth through toddlerhood, want a camera built in, and accept that it has no FDA authorization we could find.
Skip both if the cost doesn't fit or you only want a safe place to sleep. Any bassinet or crib that meets CPSC standards works. See our best cribs and best bassinets guides, or check whether you qualify for a free crib.
Recalls and safety
We searched the CPSC recall database on October 16, 2026 for SNOO, Happiest Baby and Cradlewise and found no recalls [11]. Search results change, so check the CPSC recall list before you buy or take a hand-me-down. Always stop at the limits on the label, keep the bed on a flat surface, and don't add anything to the sleep space.
Where to buy
- SNOO: Check price on Amazon Affiliate link. Also sold and rented on Happiest Baby's site.
- Cradlewise: Check price on Amazon Affiliate link. Also sold on Cradlewise's site.
Questions people ask
What is the difference between Cradlewise and SNOO?
The SNOO is a bassinet you use for about the first 6 months with a Sleep Sack that clips in, and Happiest Baby sells and rents it [2][6]. Cradlewise is a smart bassinet that converts to a crib, listed for birth to 24 months [3]. The SNOO has an FDA De Novo authorization, and we found none for Cradlewise [1][4].
Is the SNOO FDA approved?
The FDA granted the SNOO a De Novo authorization (DEN210039) as an infant supine sleep system, Class II [1]. That covers facilitating a back-sleeping position. The FDA's summary also says the SNOO has not directly demonstrated a reduction in the incidence of SIDS or SUID [1].
Is Cradlewise FDA approved?
Not that we could find. Cradlewise's product and certifications pages list CPSC and ASTM standards and a third-party safety verification, and say nothing about FDA authorization [3][4]. Ask Cradlewise directly if this matters to you.
How long can a baby use Cradlewise?
Cradlewise lists use from birth to 24 months and up to 33 lb. In bassinet mode, it says babies typically move to the crib around 5 months or 18 lb, or when they push up on hands and knees, whichever comes first [3]. Follow the manual's limits over any general figure.
Can you rent a SNOO?
Yes. Happiest Baby says rentals are ordered directly from it or from an authorized partner, and renters get a free Premium subscription for the length of the rental plus 1 month [6]. We didn't find a rental program on Cradlewise's pages.
Do smart bassinets prevent SIDS?
No smart bassinet has been shown to. The AAP says to avoid commercial devices that claim to reduce SIDS risk, because there is no evidence that any of them do [10]. Back sleeping on a firm, flat surface is what the AAP recommends [9].
Sources
Numbers in brackets in the guide link to these sources.
- 1.De Novo Classification Request for SNOO Smart Sleeper (DEN210039)U.S. Food and Drug Administration, 2023
- 2.SNOO FDA De Novo authorization, indications and safety informationHappiest Baby, 2026
- 3.Cradlewise Convertible Smart Bassinet & CribCradlewise, 2026
- 4.Cradlewise CertificationsCradlewise, 2026
- 5.Cradlewise Nurture plansCradlewise, 2026
- 6.SNOO Smart SleeperHappiest Baby, 2026
- 7.16 CFR Part 1218: Safety Standard for Bassinets and CradlesElectronic Code of Federal Regulations (eCFR), 2026
- 8.Bassinets and Cradles (Business Guidance)U.S. Consumer Product Safety Commission (CPSC), 2026
- 9.How to Keep Your Sleeping Baby Safe: AAP Policy ExplainedAmerican Academy of Pediatrics (HealthyChildren.org), 2026
- 10.Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep EnvironmentAmerican Academy of Pediatrics (Pediatrics 150(1)), 2022
- 11.RecallsU.S. Consumer Product Safety Commission (CPSC), 2026
