Dreame L40s Ultra
The value pick of Dreame’s range: strong measured carpet cleaning, long runtime and a full self-cleaning dock for about half the flagship price.
Amazon $499.97$499.97
The Dreame L40s Ultra is the better robot vacuum overall, rated 4.6 to 4.0. The Dreame L40s Ultra leads on mopping and cleaning. The iRobot Roomba Combo 10 Max wins on value. The iRobot Roomba Combo 10 Max costs $99.98 less ($399.99 vs $499.97).
iRobot Roomba Combo 10 Max
For pet owners who want camera obstacle avoidance and a mop that never touches carpet; check availability first, as it is now hard to find new.
Amazon $399.99$399.99
Prices were last checked October 27, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dreame L40s Ultra for mopping (Dual spinning pads, leaves its mop at the dock for carpet, extends to edges vs Static pad) and cleaning (measured 92% of sand from carpet, 91% of pet hair, no hair tangled vs measured 85% of sand from carpet, 100% of pet hair, some hair tangled (0.5)).
- Choose the iRobot Roomba Combo 10 Max for value ($400 vs $500).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dreame L40s Ultra | iRobot Roomba Combo 10 Max |
|---|---|---|
| Overall rating | 4.6/5 | 4.0/5 |
| Cleaning 30% | 88 measured 92% of sand from carpet, 91% of pet hair, no hair tangled | 64 measured 85% of sand from carpet, 100% of pet hair, some hair tangled (0.5) |
| Value 25% | 78 $500 | 92 $400 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent | 87 Self-empties the bin, washes the mop |
| Navigation 15% | 85 LiDAR + 3D light | 80 Camera + 3D light |
| Mopping 10% | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges | 10 Static pad |
Independent tests
Dreame L40s Ultra
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 92% | 91% | 0 | 1,538 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
iRobot Roomba Combo 10 Max
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 85% | 100% | 0.5 | 542 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Dreame L40s Ultra | iRobot Roomba Combo 10 Max | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 19,000 Pa | - |
| Main brush | HyperStream Detangling DuoBrush (bristled rubber brush plus TPU rubber brush) | dual rubber brushes |
| Dustbin | 310 mL | - |
| Extending side brush | Yes | - |
| Mopping | ||
| Mop | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges | Static pad |
| Mop lift | 10.5 mm | - |
| Leaves mop at dock | Yes | No |
| Extending mop | Yes | No |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | - |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | - |
| Hot-air drying | Yes | No |
| Detergent dosing | Yes | - |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | Camera + 3D light |
| Obstacle avoidance | 3DAdapt structured-light obstacle avoidance | PrecisionVision camera recognises and avoids cords, socks and pet waste |
| Climbs thresholds | 40 mm | - |
| Matter | - | Yes |
| Voice assistants | Alexa, Google Assistant | Alexa, Siri, Google Assistant |
| Build | ||
| Height | 3.8 in (97 mm) | 3.4 in (86 mm) |
| Battery | 5,200 mAh | 4,200 mAh |
| Run time | Up to 3 h 40 min | - |
| Weight | 9 lb (4.1 kg) | 11 lb (5 kg) |
| Warranty | 3 years | - |
| Released | 2025-08 | 2024-08 |