Robot Vacuums · Head to head

Narwal Flow vs Roborock Saros 20 Sonic

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from Amazon and official Narwal and Roborock sites.
2026 verdict
The Narwal Flow wins this hard-floor matchup on value, runtime and the bigger clean-water tank.
Narwal Flow
Winner
Narwal Flow
$999.99

Last recorded price

Buy on Amazon USA
It brings a 5 L tank against the Roborock Saros 20 Sonic's 4 L, is rated for 200 minutes against 190, and it is the better reviewed of the two and the more affordable. The Roborock Saros 20 Sonic answers with a rated 36000Pa of suction against the Narwal's 22000Pa and a larger 2.7 L dock bin against 2.5 L. Both wash and dry their mops at the dock and both reach every major platform, so the Narwal Flow is the one for mopping-led homes and the Roborock Saros 20 Sonic is the one for maximum rated suction.
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FeatureNarwal FlowRoborock Saros 20 SonicWinner
Rating4.44.2Narwal Flow
Battery Life200 minutes190 minutesNarwal Flow
Suction Power22000Pa36000PaRoborock Saros 20 Sonic
Water Tank Capacity5L4LNarwal Flow
Dock Dustbin Capacity2.5L2.7LRoborock 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

What the differences mean

Rated suction

The Roborock Saros 20 Sonic is rated at 36000Pa and the Narwal Flow at 22000Pa, so the Roborock has far more suction on paper for carpets and heavy debris. The Narwal relies on its roller mop for hard floors.

Clean water tank

The Narwal Flow carries a 5 L clean water tank in the dock against 4 L on the Roborock Saros 20 Sonic. For a home that mops often, the difference is a few extra days between refills.

Dock dust bin

The Roborock Saros 20 Sonic holds a 2.7 L dock bin and the Narwal Flow a 2.5 L bag rated for up to 120 days. The two are close enough that neither owner would notice the gap.

Rated noise

The Narwal Flow is rated at 60 dB(A) and the Roborock Saros 20 Sonic at 64 dB. Four decibels is a small but audible step, which is why owners describe the Narwal as comfortable to run while at home.

Detergent handling

The Roborock Saros 20 Sonic doses cleaning solution from the dock automatically. The Narwal Flow has no separate dosing reservoir, so its solution is measured into the clean water tank by hand before a run.

Which one to buy if

Winner
Narwal

Narwal Flow

Prime exclusive deal
$999.99

Last recorded price

Buy on Amazon USA
  • + Rating: 4.4
  • + Battery Life: 200 minutes
  • + Water Tank Capacity: 5L
  • - Suction Power: 22000Pa vs 36000Pa
  • - Dock Dustbin Capacity: 2.5L vs 2.7L
Roborock

Roborock Saros 20 Sonic

Prime exclusive deal

Last recorded priceOct 1, 2026$1499.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Suction Power: 36000Pa
  • + Dock Dustbin Capacity: 2.7L
  • - Rating: 4.2 vs 4.4
  • - Battery Life: 190 minutes vs 200 minutes

What owners say

Owners of the Narwal Flow describe the same set of wins: the FlowWash track mop washes the floor rather than smearing it, dried spots and kitchen grease come up in a pass or two, and the dirty water tank makes the result visible. Pet owners credit the tangle-free roller with ending manual hair removal, and quiet running, a long runtime and fast dToF mapping with camera avoidance come up repeatedly. The complaints are specific and consistent: the app cannot be told by hand which areas are carpet, some owners see it mislabel bare floor as rug, and a minority report genuinely poor pickup on particular carpet types. A few also mention blocking off stairs during the first map and measuring detergent into the tank by hand.

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.

  • Narwal Flow
  • Roborock Saros 20 Sonic

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Frequently Asked Questions

Which is better overall: Narwal Flow or Roborock Saros 20 Sonic?

For a hard-floor home, the Narwal Flow, on its roller mop, its value, its longer runtime and its bigger water tank. The Roborock Saros 20 Sonic is the better choice for rated suction and a larger dock bin.

What is the biggest difference between the Narwal Flow and the Roborock Saros 20 Sonic?

The mop and the suction rating are opposites here. The Narwal Flow uses a self-rinsing roller and is rated at 22000Pa, while the Roborock Saros 20 Sonic is a conventional robot mop rated at 36000Pa.

How do the tanks of the Narwal Flow and the Roborock Saros 20 Sonic compare?

The Narwal Flow carries a 5 L clean water tank against 4 L on the Roborock Saros 20 Sonic. On the dock bin the Roborock holds 2.7 L against 2.5 L on the Narwal.

Do the Narwal Flow and the Roborock Saros 20 Sonic work with Apple Home and Matter?

Both do. Each is a Matter robot that reaches Apple Home, SmartThings and Home Assistant, and each also works with Alexa and Google Home directly.

Who should buy the Narwal Flow?

Owners of mostly hard floors who want the best mopping of the pair, quieter running, a larger water tank and one of the few robots with a roller that rinses itself continuously.

Who should buy the Roborock Saros 20 Sonic?

Buyers who want the highest rated suction, a bigger dock bin and automatic detergent dosing, on both Wi-Fi bands and Matter.

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