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Robot Vacuums · Head to head

iRobot Roomba Plus 505 vs Roborock Saros 20

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from Amazon and official iRobot and Roborock sites.
2026 verdict
Thick rugs plus a robot that must slide under the sofa make the Roborock Saros 20 the one to buy.
Roborock Saros 20
Winner
Roborock Saros 20
$1479.99$1599.998% OFF
It lists 36,000 Pa, 200 minutes and a 79.8 mm body, with a dock that hot-washes the mops. The iRobot Roomba Plus 505 still washes and dries a mop and self-empties, at 7,000 Pa and 180 minutes, and it is the more affordable of the pair. Keep the Roborock Saros 20 for suction and low furniture. Keep the iRobot Roomba Plus 505 when the budget stops at a capable dock.
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FeatureiRobot Roomba Plus 505Roborock Saros 20Winner
Price$695.00$1479.99iRobot Roomba Plus 505
Battery Life180 minutes200 minutesRoborock Saros 20
Suction Power7000Pa36000PaRoborock Saros 20
Rating4.24.2Tie
Warranty1 year1 yearTie
Auto RechargeYESYESTie
Connectivity2.4 GHz WiFi, 5 GHz WiFi, Bluetooth2.4 GHz WiFi, 5 GHz WiFiTie
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
Obstacle DetectionYESYESTie
Cliff DetectionYESYESTie
Multi-Room MappingYESYESTie

What the differences mean

Suction

The Roborock Saros 20 is rated at 36,000 Pa. The iRobot Roomba Plus 505 is rated at 7,000 Pa. That is not a rounding gap. On a thick rug with pet hair ground in, the Roborock number is the reason the sheet picks it. Both still lift the mop, wash it, dry it and empty the bin, so the dock chores are shared.

Height and runtime

The Roborock Saros 20 is 79.8 mm tall and rated for 200 minutes, charging in about 2.5 hours. The iRobot Roomba Plus 505 is 106 mm tall and rated for 180 minutes, charging in about 4.5 hours. Twenty minutes of runtime is modest. The height and the charge time are what you feel: more furniture cleared, and a faster return after a top-up.

Hot water and the tank

Roborock Saros 20 owners describe dual spinning mops washed at 212 F, and the robot carries a 4 L water system with automatic detergent. The iRobot Roomba Plus 505 washes and dries the mop and lifts it, and it does not list an automatic detergent dispenser. If hot water is the reason you trust a mop, the Roborock is the one whose owners name a temperature.

What they share

Both support Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter, and both support 5 GHz Wi-Fi. Smart home is not a reason to separate them. Separate them on suction and height instead. The Roborock Saros 20 also lists 63 dB, and its owners call overnight runs comfortable, which is a different claim from the Plus 505 dock cycle owners call loud.

Which one to buy if

What owners say

Owners of both like a dock that empties and washes, then they notice different kinds of power. iRobot Roomba Plus 505 owners praise fast LiDAR maps, pet-hair pickup on carpet and hard floors, and obstacle avoidance around cords, while they say the dock cycle is loud and some units develop navigation or bumper-stuck errors after a few months. Roborock Saros 20 owners single out very high suction on embedded dust, a slim body under sofas, quiet overnight runs, and hot-water mop washing, and they complain that detergent is an extra purchase, threshold climbing can be inconsistent, deep-clean runs drain the battery faster, and the mop will not automatically re-scrub a still-dirty patch.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • iRobot Roomba Plus 505
  • Roborock Saros 20

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Frequently Asked Questions

Which is better overall: iRobot Roomba Plus 505 or Roborock Saros 20?

The Roborock Saros 20. It has 36,000 Pa against 7,000 Pa, 200 minutes against 180, and a 79.8 mm body against 106 mm, with hot-water mop washing. The iRobot Roomba Plus 505 is the more affordable robot that still empties, washes and dries a mop and supports Apple Home and Matter.

What is the biggest difference between the iRobot Roomba Plus 505 and the Roborock Saros 20?

Suction. The Roborock Saros 20 is rated at 36,000 Pa and the iRobot Roomba Plus 505 at 7,000 Pa. The Roborock is also shorter, at 79.8 mm against 106 mm, and charges in about 2.5 hours against 4.5. Both mop, self-empty and support Matter.

Do the iRobot Roomba Plus 505 and the Roborock Saros 20 both mop?

Yes. Both mop, lift the mop on carpet, and use a dock that washes, dries and empties. The Roborock Saros 20 adds a 4 L water system, automatic detergent and owner reports of 212 F washing. The iRobot Roomba Plus 505 does not list an automatic detergent dispenser.

Which is better under a low sofa?

The Roborock Saros 20, at 79.8 mm tall, against 106 mm for the iRobot Roomba Plus 505. Both use LiDAR and obstacle detection. Height is what decides whether the space under the sofa is cleaned or skipped.

Who should buy the Roborock Saros 20?

Homes with thick rugs, pet hair and low furniture that want 36,000 Pa, a hot-water mop and Matter or Apple Home, and that can accept a flagship robot.

Who should buy the iRobot Roomba Plus 505?

Buyers who want the bin emptied and the mop washed, with Apple Home and 5 GHz Wi-Fi, and who do not need 36,000 Pa or a sub-80 mm body.

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