Robot Vacuums · Head to head

Dreame L40 Ultra Gen 2 vs Roborock Saros 20

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from the official Dreame and Roborock sites.
2026 verdict
Longer warranty or more suction? The Dreame L40 Ultra Gen 2 is the better value robot vacuum and mop of the two, with a three-year warranty, a 231 minute battery and 25000Pa of suction.
Dreame L40 Ultra Gen 2
Winner
Dreame L40 Ultra Gen 2
$499.98$749.9933% OFF
Buy on Amazon USA
It also carries a 4.5L water tank and a 3.2L dock bag. The Roborock Saros 20 hits harder at 36000Pa, slides under furniture at 79.8 mm tall, adds 5 GHz Wi-Fi and already works with Apple Home, SmartThings, Home Assistant and Matter, where Dreame lists those four as coming in an update. Both docks empty the robot and wash, dry and lift the mops. Pick the Dreame L40 Ultra Gen 2 for long cover and value, and the Roborock Saros 20 for maximum suction, low furniture and Matter today.
Works with
Connectivity
  • Wi-Fi 2.4 GHz
vs
Works with
Connectivity
  • Wi-Fi 2.4/5 GHz
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FeatureDreame L40 Ultra Gen 2Roborock Saros 20Winner
Price$499.98£899.00Dreame L40 Ultra Gen 2
Rating4.44.2Dreame L40 Ultra Gen 2
Warranty3 years1 yearDreame L40 Ultra Gen 2
Battery Life231 minutes200 minutesDreame L40 Ultra Gen 2
Connectivity2.4 GHz WiFi2.4 GHz WiFi, 5 GHz WiFiRoborock Saros 20
Suction Power25000Pa36000PaRoborock Saros 20
Water Tank Capacity4.5L4LDreame L40 Ultra Gen 2
Onboard Dustbin Capacity250ml259mlRoborock Saros 20
Dock Dustbin Capacity3.2L2.5LDreame L40 Ultra Gen 2
Auto RechargeYESYESTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie

What the differences mean

Suction

36000Pa on the Roborock Saros 20 against 25000Pa on the Dreame L40 Ultra Gen 2. Both are strong for daily cleaning; the Roborock's extra power shows on thick carpet and embedded hair.

Height

The Roborock Saros 20 is 79.8 mm tall against 97 mm for the Dreame. Owners of the Saros 20 say it is the first robot that cleans under their sofa.

Smart home today

Both work with Alexa and Google Home. The Roborock Saros 20 already supports Apple Home, SmartThings, Home Assistant and Matter; Dreame lists all four as an upcoming update for the L40 Ultra Gen 2.

Warranty

Three years on the Dreame L40 Ultra Gen 2 against one year on the Roborock Saros 20, a significant difference on a robot with this much dock machinery.

Detergent dosing

The Roborock Saros 20 station doses detergent automatically. On the Dreame L40 Ultra Gen 2 the auto-detergent module is sold separately.

Which one to buy if

Winner
Dreame

Dreame L40 Ultra Gen 2

33% OFF
Prime exclusive deal
$499.98
$749.99
Buy on Amazon USA
  • + Price: $499.98
  • + Rating: 4.4
  • + Warranty: 3 years
  • - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, 5 GHz WiFi
  • - Suction Power: 25000Pa vs 36000Pa
Roborock

Roborock Saros 20

31% OFF
Prime exclusive deal
£899.00
£1299.00
Buy on Amazon UK
  • + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi
  • + Suction Power: 36000Pa
  • + Onboard Dustbin Capacity: 259ml
  • - Price: £899.00 vs $499.98
  • - Rating: 4.2 vs 4.4

What owners say

Owners of both robots praise fast, accurate mapping, strong pickup of dust and pet hair, a dock that makes cleaning nearly hands-off and a side brush that reaches corners. Dreame L40 Ultra Gen 2 owners single out value for the feature set, but report hair tangling in the wheels or brush, mop pads coming off mid-clean and an app with a real learning curve. Roborock Saros 20 owners talk about finally cleaning under their furniture, runs quiet enough for overnight, obstacle avoidance around cables and pets and a camera for checking on pets, while noting that no detergent is included, some thresholds defeat it and the battery drains faster on deep-clean and carpet runs.

Frequently Asked Questions

Which is better overall: Dreame L40 Ultra Gen 2 or Roborock Saros 20?

For value, the Dreame L40 Ultra Gen 2: it has a three-year warranty, a 231 minute battery and 25000Pa of suction. The Roborock Saros 20 is the stronger machine at 36000Pa, slimmer at 79.8 mm and already on Matter.

What is the biggest difference between the Dreame L40 Ultra Gen 2 and the Roborock Saros 20?

Suction and height against warranty. The Roborock Saros 20 has 36000Pa and a 79.8 mm body; the Dreame L40 Ultra Gen 2 has 25000Pa, a 97 mm body and three years of cover instead of one.

Does the Dreame L40 Ultra Gen 2 work with Apple Home and Matter?

Not yet. Dreame lists Apple Home, SmartThings, Home Assistant and Matter as an upcoming update for the Dreame L40 Ultra Gen 2. The Roborock Saros 20 supports all four today.

Do both robots wash and dry their mops?

Yes. The Dreame L40 Ultra Gen 2 and the Roborock Saros 20 both empty the robot and wash and dry the mops at the dock, and both lift the mops on carpet.

Who should buy the Dreame L40 Ultra Gen 2?

Buyers who want a full-featured self-washing robot with strong suction and three years of warranty, and who use Alexa or Google Home.

Who should buy the Roborock Saros 20?

Buyers who want the highest suction, a robot slim enough for low furniture and Matter or Apple Home support today, and who accept one year of warranty.

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