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Robot Vacuums · Head to head

iRobot Roomba Max 705 Combo vs Roborock Saros 20 Sonic

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from Amazon and official iRobot and Roborock sites.
2026 verdict
Cleaning power and endurance put the Roborock Saros 20 Sonic ahead, and the ownership record behind each one matters too.
Roborock Saros 20 Sonic
Winner
Roborock Saros 20 Sonic
$1499.99$1699.9912% OFF
Buy on Amazon USA
The Roborock Saros 20 Sonic is rated at 36,000 Pa and 190 minutes against 13,000 Pa and 120 minutes on the iRobot Roomba Max 705 Combo, and it is 79.8 mm tall where the Roomba is 105 mm. The iRobot Roomba Max 705 Combo is the more affordable option and still runs the full routine, with its AutoWash dock emptying, heat-washing, drying and dosing a roller mop. Both support 5 GHz Wi-Fi, Bluetooth and the same six smart-home platforms. Choose the Roborock Saros 20 Sonic for suction, runtime and a low body, and the iRobot Roomba Max 705 Combo when the lower outlay matters most.
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FeatureiRobot Roomba Max 705 ComboRoborock Saros 20 SonicWinner
Price$799.00$1499.99iRobot Roomba Max 705 Combo
Rating3.64.2Roborock Saros 20 Sonic
Battery Life120 minutes190 minutesRoborock Saros 20 Sonic
Suction Power13000Pa36000PaRoborock Saros 20 Sonic
Warranty1 year1 yearTie
Auto RechargeYESYESTie
Connectivity2.4 GHz WiFi, 5 GHz WiFi, Bluetooth2.4 GHz WiFi, 5 GHz WiFi, BluetoothTie
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 and runtime

The Roborock Saros 20 Sonic is rated at 36,000 Pa and 190 minutes. The iRobot Roomba Max 705 Combo is rated at 13,000 Pa and 120 minutes. Both mop and self-empty, so the dock category is shared. The airflow and the run length are not, and that is where the pick is decided.

Body height

The Roborock Saros 20 Sonic is 79.8 mm tall, the iRobot Roomba Max 705 Combo 105 mm. Low sofas and bed frames are a target for one and a skip for the other, and that gap is the difference a buyer notices on the first run.

Charging

The Roborock Saros 20 Sonic recharges in about 2.5 hours, the iRobot Roomba Max 705 Combo in about 4.5. On a large floor the longer charge keeps the Roomba off the job sooner on a mid-run top-up.

Published dock figures

The Roborock Saros 20 Sonic documents a 4 L water tank, a 2.7 L dock bin, a 228 ml onboard bin and a 64 dB rating. The iRobot Roomba Max 705 Combo does not publish water, onboard, dock or noise figures, so those rows stay empty.

Water system

The Roborock Saros 20 Sonic carries a 4 L water system and doses detergent automatically. The iRobot Roomba Max 705 Combo also heat-washes, dries and doses detergent, but its tank size is not published. Both still need the dirty water dealt with after a mopping day.

Which one to buy if

What owners say

The only owner reviews here are for the iRobot Roomba Max 705 Combo, and they are a caution. The owners who are happy describe accurate LiDAR mapping with easy zone drawing, smooth navigation that slows around objects instead of hitting them, an extending roller mop that reaches edges and leaves floors fairly dry, and an AutoWash dock that empties, heat-washes and dries without hands. The larger group describes failures: false bin and dirty-water-tank errors on clean machines, docks that leak, puddles and streaks from the mop, schedules that break, a Wi-Fi setup that rejects special characters, a loud machine with a short-feeling run, and slow support. Several returned it, often for a rival.

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 Max 705 Combo
  • Roborock Saros 20 Sonic

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Frequently Asked Questions

Which is better overall: iRobot Roomba Max 705 Combo or Roborock Saros 20 Sonic?

The Roborock Saros 20 Sonic. It is rated at 36,000 Pa against 13,000 Pa, 190 minutes against 120, and stands 79.8 mm against 105 mm. The iRobot Roomba Max 705 Combo is the more affordable mop robot that still self-empties and hot-washes the roller.

What is the biggest difference between the iRobot Roomba Max 705 Combo and the Roborock Saros 20 Sonic?

Suction and height. The Roborock Saros 20 Sonic is rated at 36,000 Pa and 79.8 mm. The iRobot Roomba Max 705 Combo is rated at 13,000 Pa and 105 mm. Runtime is 190 minutes against 120. Both mop, wash, dry and self-empty.

Do the iRobot Roomba Max 705 Combo and the Roborock Saros 20 Sonic both work with Apple Home?

Yes. Both support Apple Home, Alexa, Google Home, SmartThings, Home Assistant and Matter, and both support 5 GHz Wi-Fi and Bluetooth. Smart home is not the split. Suction, runtime and body height are.

Which robot fits under a low bed?

The Roborock Saros 20 Sonic, at 79.8 mm, against 105 mm for the iRobot Roomba Max 705 Combo. That gap decides whether the space under the frame gets cleaned or simply left out.

Who should buy the Roborock Saros 20 Sonic?

Homes with low furniture and thick carpet or pet hair that want 36,000 Pa, a 190 minute battery and a sonic mop the dock washes.

Who should buy the iRobot Roomba Max 705 Combo?

Buyers who want a Roomba that mops, empties and hot-washes, with Apple Home and 5 GHz Wi-Fi, at the lower outlay, and who do not need 36,000 Pa or a sub-80 mm body.

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