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iRobot Roomba j7+ vs Dreame L40s Ultra AE Robot Vacuum

The Dreame L40s Ultra AE is the stronger cleaner: 19,000Pa suction, a mop that washes itself in 167°F water, and a liftable brush for hair. The Roomba j7+ is the safer pick for obstacle avoidance and the only one with a pet-waste replacement promise. At $119.99 at Woot as of November 7, 2026, the j7+ costs about $421 less than the L40s Ultra AE at $541.49 at Dreametech.

Today the iRobot Roomba j7+ costs $421.50 less at its best price.

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iRobot
iRobot Roomba j7+ Self-Emptying Robot Vacuum

iRobot Roomba j7+

iRobot Roomba j7+ Self-Emptying Robot Vacuum

3.8(526 ratings)
$119.99at Woot
Observed at 2:27 PM
See all prices and details
Visit Woot

Choose the Roomba j7+ if you want a proven obstacle-avoiding vacuum with a pet-waste guarantee for a fraction of the price, and you can live without mopping.

Pros
  • Lowest price by a wide margin at $119.99 at Woot
  • PrecisionVision object avoidance with a pet-waste replacement promise
  • Self-empties into enclosed bags
  • Smart maps with Keep Out and Clean Zones, works with Alexa and Google Assistant
  • Light at 7 lb
Cons
  • No mopping
  • Weaker suction than the Dreame
  • 3.8 out of 5 from 526 ratings
  • Released November 2021, older platform
  • Price history is volatile: $39.99 low to $799.95 high since November 1, 2026
Dreame
Dreame L40s Ultra AE Robot Vacuum

Dreame L40s Ultra AE Robot Vacuum

4.4(37 ratings)
$541.49at DreametechObserved at 3:47 PM
See all prices and details
Visit Dreametech

Choose the Dreame L40s Ultra AE if you need real mopping, strong suction on carpet, and hair-cutting brushes, and the $541.49 price is acceptable.

Pros
  • 19,000Pa suction for carpet and large debris
  • Self-washing and hot-air-drying mop pads
  • TriCut brush cuts long hair
  • Up to 180 minutes and 1,808 sq ft per charge
  • 4.4 out of 5 from 37 ratings
Cons
  • $541.49 at Dreametech, roughly 4.5x the j7+ price
  • 27 lb robot and base are heavy to move
  • Only 37 ratings so far
  • Buyers report spots left on stubborn food stains on ceramic
  • Only 3 stores price it new

What separates them

iRobot Roomba j7+Dreame L40s Ultra AE Robot Vacuum
Price$119.99 at Woot as of November 7, 2026$541.49 at Dreametech as of November 7, 2026
Suction3-Stage system, 10x the Roomba 600 series19,000Pa Vormax
MoppingNoneMopExtend mop, pads washed in 167°F water and hot-air dried
Obstacle avoidancePrecisionVision avoids cords, socks, shoes and pet waste, with P.O.O.P. replacement promiseBuyers call obstacle avoidance superb
Hair handlingDual multi-surface rubber brushesLiftable rubber brush plus TriCut brush with hair-cutting blade
Self-empty capacityClean Base with enclosed bags3.2L bag, up to 100 days
Battery and coverageNot published in the listing5,200mAh, up to 180 min and 1,808 sq ft per charge
Weight7 lb27 lb

Price history

$799.95$39.99
Nov 1Nov 7
  • iRobot Roomba j7+: lowest $39.99 on Nov 6 at eBay; $119.99 on Nov 7.
  • Dreame L40s Ultra AE Robot Vacuum: lowest $541.49 on Nov 3 at Dreametech; $541.49 on Nov 7.

Prices at every store

iRobot Roomba j7+

  • WootNew

    In stock

    $119.99Observed at 2:27 PM
    Visit Woot
  • eBayNew

    Availability unknownSold by buy-from-here

    $174.90Observed at 2:27 PM
    Visit eBay
  • Back MarketNew

    Availability unknown

    $274.00Observed at 2:27 PM
    Visit Back Market
  • DatavisionNew

    Availability unknown

    $579.00Observed at 2:27 PM
    Visit Datavision

Also available at

  • Electronic ExpressCheck price at Electronic Express
  • JoyusCheck price at Joyus
  • NT ElectronicsCheck price at NT Electronics

Store links may earn us a commission.

All 8 stores and price history →

Dreame L40s Ultra AE Robot Vacuum

  • DreametechNew

    In stock

    $541.49Observed at 3:47 PM
    Visit Dreametech
  • Best BuyNew

    In stock

    $669.99Free shippingObserved at 10:48 AM
    Visit Best Buy
  • eBayPre-owned

    Availability unknownSold by amdealsus

    $299.00Observed at 1:05 PM
    Visit eBay

Also available at

  • Grooves-Inc.comCheck price at Grooves-Inc.com
  • ShopCheck price at Shop

Store links may earn us a commission. Some prices via Klarna.

All 3 stores and price history →

Specs compared

SpeciRobot Roomba j7+Dreame L40s Ultra AE Robot Vacuum
CordlessYesYes
ColorGrayWhite
Weight7 lb27 lb
BaglessYes—
For PetsYes—
Assistant SupportGoogle Assistant, Amazon Alexa—
Release DateNovember 2021—
Capacity—0.79 gal
Features—Self-Emptying

What reviewers say

iRobot Roomba j7+

  • 3.8 / 5526 ratings

Ratings average 3.8 out of 5 from 526 buyers, a middling score for a premium robot vacuum. Owners tend to like the self-empty base and the object avoidance, while complaints cluster around navigation quirks and reliability over time.

What people mention
  • Self-empty basePraisedOwners say the Clean Base lets them go weeks without touching the bin.
  • Obstacle avoidancePraisedReviewers report it reliably steers around pet waste, cords and shoes.
  • NavigationMixedSome owners find mapping accurate; others say it gets stuck or loses rooms.
  • ReliabilityCriticisedA share of buyers report failures or degraded cleaning after a year or more.

Dreame L40s Ultra AE Robot Vacuum

  • 4.4 / 537 ratings

Rated 4.4 out of 5 from 37 ratings, owners describe a genuinely hands-off system that cleans overnight and handles pet and family hair well. Complaints center on occasional missed spots on stubborn kitchen stains.

What people mention
  • Hands-off cleaningPraisedOwners say they set it up and wake up to clean, polished floors.
  • Hair handlingPraisedThe TriCut brush handles long hair from family members well.
  • Obstacle avoidancePraisedBuyers call obstacle avoidance superb.
  • Pet hairPraised

Questions and answers

Which is better for pet hair?
The Dreame L40s Ultra AE. Its 19,000Pa suction and TriCut hair-cutting brush handle heavy shedding better. The j7+ counters with PrecisionVision pet-waste avoidance and iRobot's replacement promise.
Do I need the Dreame if I have mostly hard floors?
Yes, if you want mopping. The j7+ only vacuums. The Dreame washes its pads in 167°F water and dries them, which matters on tile and wood.
Is the Roomba j7+ worth it at $119.99?
Yes, for a vacuum-only robot with object avoidance. At that price at Woot as of November 7, 2026, it is about $421 cheaper than the Dreame.
Which lasts longer?
Neither maker publishes a lifespan. The j7+ dates to November 2021 and has a large review base; the Dreame is newer with few ratings. Bag and brush costs apply to both.
Which is better for a large home?
The Dreame. It covers up to 1,808 sq ft and 180 minutes per charge. iRobot does not publish comparable figures for the j7+.
Which is quieter or easier to move?
The j7+ at 7 lb is far easier to lift than the 27 lb Dreame. Neither listing publishes decibel ratings.

More comparisons

  • Eufy E Series Omni Robot Vacuum with Self-Cleaning Station and Dust Bags vs iRobot Roomba j7+ Self-Emptying Robot Vacuum
  • Shark Detect Pro Robot Vacuum Self-Empty rv2820ae vs iRobot Roomba j7+ Self-Emptying Robot Vacuum
  • Eufy E Series Omni Robot Vacuum with Self-Cleaning Station and Dust Bags vs Dreame L40s Ultra AE Robot Vacuum
Owners say it is great for homes with heavy-shedding dogs.