Roborock Saros 20 Sonic
For homes that want the Saros 20’s slim build and threshold climbing with a retractable LiDAR and a sonic mop.
AmazonThe Roborock Saros 20 Sonic and the Narwal Freo 20 are evenly matched, rated 4.2 and 4.2. The Narwal Freo 20 wins on mopping.
Narwal Freo 20
Narwal’s cheaper FlowWash robot, with top-tier carpet cleaning and enough range for very large homes. A strong pick for big homes with hard floors to mop.
Amazon $1,099.99$1,099.99
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Narwal Freo 20 for mopping (Roller, extends to edges vs Vibrating pad, leaves its mop at the dock for carpet).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | Roborock Saros 20 Sonic | Narwal Freo 20 |
|---|---|---|
| Overall rating | 4.2/5 | 4.2/5 |
| Cleaning 30% | 82 measured 92% of sand from carpet, 77.8% of pet hair, no hair tangled | 89 measured 93% of sand from carpet, 87.5% of pet hair, no hair tangled |
| Value 25% | 50 no current price (neutral score used) | 30 $1,100 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent, optional water hookup | 94 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying |
| Navigation 15% | 100 LiDAR + camera | 100 LiDAR + camera |
| Mopping 10% | 46 Vibrating pad, leaves its mop at the dock for carpet | 85 Roller, extends to edges |
Independent tests
Roborock Saros 20 Sonic
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 92% | 77.8% | 0 | 1,225 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Narwal Freo 20
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 93% | 87.5% | 0 | 2,489 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Roborock Saros 20 Sonic | Narwal Freo 20 | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 36,000 Pa | 31,000 Pa |
| Main brush | DuoDivide anti-tangle brush | Floating roller brush (DualFlow tangle-free system) |
| Dustbin | 228 mL | - |
| Extending side brush | Yes | No |
| Mopping | ||
| Mop | Vibrating pad, leaves its mop at the dock for carpet | Roller, extends to edges |
| Mop lift | 8 mm | - |
| Leaves mop at dock | Yes | No |
| Extending mop | No | Yes |
| Water tank | 70 mL | - |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | - | 2.4 L |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | Yes | No |
| Water hookup option | Yes | - |
| Navigation & app | ||
| Navigation | LiDAR + camera | LiDAR + camera |
| Obstacle avoidance | Reactive AI 3.0 obstacle recognition | Dual RGB cameras with AI, recognises 300+ objects; structured-light edge sensors |
| Climbs thresholds | 88 mm | 40 mm |
| Matter | Yes | - |
| Voice assistants | Alexa, Google Assistant, Siri Shortcuts | - |
| Build | ||
| Height | 3.1 in (79.8 mm) | 3.7 in (95 mm) |
| Retracting LiDAR | Yes | - |
| Battery | 6,400 mAh | 5,900 mAh |
| Run time | Up to 3 h 10 min | - |
| Warranty | 1 year | 1 year |
| Released | - | 2026-08 |