Narwal Flow vs Roborock Saros 20
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the Narwal Flow costs $1,500 and the Roborock Saros 20 costs $1,600, so the Narwal Flow is $100 cheaper. The Roborock Saros 20 has a published review score and ranks #44 in our robot vacuums ranking; the Narwal Flow is not scored yet. Pick the Narwal Flow for hard floor homes that mop often and have pets. Pick the Roborock Saros 20 for low furniture and tall thresholds. The Roborock Saros 20 wins 4 of 6 points we can measure.
Who wins, point by point
The Roborock Saros 20 wins 4 of 6 points we can measure. Built from today's prices, the specs and independent tests for these two robots.
| Flow | Saros 20 | Winner | |
|---|---|---|---|
| Price today | $1,500 | $1,600 | Flow |
| Suction | 22,000 Pa | 36,000 Pa | Saros 20 |
| Runtime per charge | 190 min | 200 min | Saros 20 |
| Onboard bin | 2.5 L | 260 mL | Flow |
| Climbs thresholds up to | 1.57 in | 3.46 in | Saros 20 |
| Robot height (fits under furniture) | 3.7 in | 3.14 in | Saros 20 |
- You want to spend less (saves $100)
- You care most about onboard bin (2.5 L vs 260 mL)
- Best for hard floor homes that mop often and have pets
- You care most about suction (36,000 Pa vs 22,000 Pa)
- You care most about runtime per charge (200 min vs 190 min)
- You care most about climbs thresholds up to (3.46 in vs 1.57 in)
- Best for low furniture and tall thresholds
- Suction
- 22,000 Pa
- Navigation
- dToF LiDAR inside
- Mopping
- FlowWash track mop
- Runtime
- Up to 190 min
Excellent mopping track mop robot, now the step below the Flow 2
Full Narwal Flow review, pros and cons →- Suction
- 36,000 Pa
- Navigation
- 3D ToF and camera
- Mopping
- Spinning pads
- Runtime
- About 200 min
Ultra slim Roborock flagship with top suction and threshold climbing
Full Roborock Saros 20 review, pros and cons →Side by side
| Narwal Flow | Roborock Saros 20 | |
|---|---|---|
| Price | $1,500 | $1,600 |
| 3 year cost | $1,500 | $1,600 |
| Our score | Not scored yet | 5.8/10 |
| Rank in Floors | #103 | #44 |
| Status | on sale | on sale |
| Warranty | n/a | 1 year limited (Roborock US store) |
| Suction | 22,000 Pa (Narwal); Vacuum Wars measured 1.88 kPa against a 0.96 kPa average | 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow |
| Navigation | dToF LiDAR inside the body (Narwal); TechRadar saw it push a chair, skip a room and report cleaning 0.0 square meters | StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret |
| Obstacle avoidance | Dual RGB cameras, AI chip and tri laser structured light, 200+ objects (Narwal); Vacuum Wars scored 18 of 24, and TechRadar saw it avoid a shoe, sock and USB cable | Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects avoided |
| Mopping | FlowWash track mop with warm water at 113F, 7 to 12 N pressure and 12 mm lift (Narwal); Vacuum Wars combined mopping score 268 against a 184 average | Yes, dual spinning pads with up to 13 N pressure, FlexiArm extending pad, 20 mm lift on carpet |
| Self empty | Yes, 2.5 L dust bag rated for up to 120 days (Narwal US store) | Yes, auto empties into a disposable bag; Roborock says a bag lasts up to 65 days |
| Dock features | Auto empty, mop washing at 113 to 176F, warm air drying, self cleaning; optional auto refill and drain version (Narwal US store); no auto detergent dispenser (TechRadar) | RockDock washes pads with water up to 212°F, dries at 131°F, auto refills water, doses detergent and dries the dust bag |
| Runtime | Up to 190 min (Narwal); Vacuum Wars estimated 2,068 sq ft per charge | 6,400 mAh battery; BGR cites about 200 min per charge and about 150 min to recharge |
| Dustbin | 2.5 L dock bag; Vacuum Wars describes a large robot bin with a removable section | 260 mL onboard bin (Vacuum Wars) |
| Height | 95 mm (3.7 in) per Narwal key features and Vacuum Wars; Narwal's spec table lists 107.7 mm | 3.14 in (79.8 mm) robot height per Roborock |
| Pet hair | Vacuum Wars measured 89% flattened pet hair pickup and 0% tangles in its 7 inch hair test | Vacuum Wars measured 88% flattened pet hair pickup and 0% hair wrap |
| App | Narwal app with up to 4 saved maps, schedules and voice assistant; works with Siri, Alexa and Google Assistant (Narwal US store); TechRadar found it overwhelming with some mistranslations | Roborock app with Matter, Alexa and Google Home support plus built in voice control |
| Threshold | 4 cm (1.57 in) (Narwal US store, TechRadar) | Up to 3.46 in double layer thresholds with AdaptiLift Chassis 3.0 (brand claim); Vacuum Wars cleared a 57 mm single step |
| Noise | TechRadar measured 58 dB in quiet mode to 76 dB at top suction; Tom's Guide measured 49 to 74 dB depending on floor | n/a |
| Best for | hard floor homes that mop often and have pets | low furniture and tall thresholds |
| Skip if | you want a simple, glitch free app | mopping is your top priority |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Narwal Flow
- Vacuum Wars (3.58 Vacuum Wars stars): Measured 1.88 kPa suction, 83% sand removal, 89% flattened pet hair pickup and 0% hair tangle. Combined mopping score was 268 against a 184 average, obstacle avoidance 18 of 24 and estimated coverage 2,068 sq ft per charge. Source
- Tom's Guide: Pickup was 83% overall on tile and 77% on carpet, with 70% to 75% hair pickup. Noise ranged from 49 to 74 dB depending on floor and power. Faults were a tricky app, random cleaning incidents and so so edge vacuuming. Source
Roborock Saros 20
- Vacuum Wars (3.81/5): Lab tests found 89% sand removal from carpet, 88% flattened pet hair pickup, 0% hair wrap, 17 of 24 obstacles avoided, a record 57 mm threshold climb and an above average combined mopping score; battery coverage was slightly below average at about 1,038 sq ft per charge. Source
- Tom's Guide: Picked up 100% of cereal and kitty litter on carpet and 70% of pet hair on carpet, but mopping left floors streaky and patchy and the pads fell off once crossing a cable. Source
Questions buyers ask
Which is better, the Narwal Flow or the Roborock Saros 20?
The Roborock Saros 20 has a published review score and ranks #44 in our robot vacuums ranking; the Narwal Flow is not scored yet. Pick the Narwal Flow for hard floor homes that mop often and have pets. Pick the Roborock Saros 20 for low furniture and tall thresholds.
Which is cheaper?
The Narwal Flow at $1,500, versus $1,600 for the Roborock Saros 20, checked Nov 4, 2026. Over 3 years with running costs: $1,500 vs $1,600.
What is the difference between the Flow and the Saros 20?
Suction: 22,000 Pa (Narwal); Vacuum Wars measured 1.88 kPa against a 0.96 kPa average on the Flow, 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow on the Saros 20. Navigation: dToF LiDAR inside the body (Narwal); TechRadar saw it push a chair, skip a room and… on the Flow, StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret on the Saros 20. Obstacle avoidance: Dual RGB cameras, AI chip and tri laser structured light, 200+ objects (Narwal); Vacuum… on the Flow, Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects… on the Saros 20.
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