Roborock Qrevo Slim vs Roborock Saros 20
Researched by Riley Hart · prices checked Oct 31, 2026
As of Oct 31, 2026, the Roborock Qrevo Slim costs $1,400 and the Roborock Saros 20 costs $1,600, so the Roborock Qrevo Slim is $200 cheaper. The Roborock Saros 20 has a published review score and ranks #39 in our robot vacuums ranking; the Roborock Qrevo Slim is not scored yet. Pick the Roborock Qrevo Slim for very low furniture. Pick the Roborock Saros 20 for low furniture and tall thresholds.
- Suction
- 11,000 Pa
- Navigation
- StarSight system
- Mopping
- Dual spinning mops
- Runtime
- Up to 180 min
Only worth it if you have very low beds or sofas that other robots cannot reach, since the 3.23 in body has no LiDAR turret. Tech Advisor found it fine for upkeep but weaker on carpet, and it costs more than newer slim Roborocks with stronger suction. Most buyers should look at the Qrevo Edge 2 or CurvX first.
Full Roborock Qrevo Slim review →- Suction
- 36,000 Pa
- Navigation
- 3D ToF and camera
- Mopping
- Spinning pads
- Runtime
- About 200 min
A strong pick for mixed carpet and hard floor homes with low furniture and tall door thresholds, since it is under 3.2 in tall and climbs higher steps than any robot Vacuum Wars has tested. Reviewers rate its suction and edge cleaning highly but split on mopping, and Tom's Guide found the pads streaky. If spotless mopping is your main goal, a roller mop model may suit you better.
Full Roborock Saros 20 review →Side by side
| Roborock Qrevo Slim | Roborock Saros 20 | |
|---|---|---|
| Price | $1,400 | $1,600 |
| 3 year cost | $1,502 | $1,600 |
| Our score | Not scored yet | 5.8/10 |
| Rank in Floors | #81 | #39 |
| Status | on sale | on sale |
| Warranty | 1 year (Roborock US store) | 1 year limited (Roborock US store) |
| Suction | 11,000 Pa (Roborock) | 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow |
| Navigation | StarSight system with solid state 3D ToF LiDAR, optical flow sensor and RGB camera, no top turret (Roborock) | StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret |
| Obstacle avoidance | 73 object types with 3D sensors and RGB camera (Roborock); Tech Advisor saw it bump a low hearth and swallow a cat toy feather | Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects avoided |
| Mopping | Dual spinning mops at 200 rpm on a FlexiArm, 10 mm auto lift, 30 water levels (Roborock, Vacuum Wars); Tech Advisor found dried sauce still sticky | Yes, dual spinning pads with up to 13 N pressure, FlexiArm extending pad, 20 mm lift on carpet |
| Self empty | Yes, 2.7 L bag, up to 7 weeks (Roborock, Vacuum Wars) | Yes, auto empties into a disposable bag; Roborock says a bag lasts up to 65 days |
| Dock features | 8 in 1 dock with hot water mop wash, warm air drying, dock self cleaning, auto refill and detachable base (Roborock) | 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 180 min (Roborock spec via Vacuum Wars); 5,200 mAh battery (Roborock) | 6,400 mAh battery; BGR cites about 200 min per charge and about 150 min to recharge |
| Dustbin | 220 ml (Roborock spec via Vacuum Wars) | 260 mL onboard bin (Vacuum Wars) |
| Height | 3.23 in (8.2 cm) (Roborock, Tech Advisor) | 3.14 in (79.8 mm) robot height per Roborock |
| App | Roborock app; 2.4 GHz Wi-Fi only; Hello Rocky offline voice control; Alexa, Siri and Google Home; Matter by future update (Roborock) | Roborock app with Matter, Alexa and Google Home support plus built in voice control |
| Threshold | Up to 20 mm (Roborock spec via Vacuum Wars) | Up to 3.46 in double layer thresholds with AdaptiLift Chassis 3.0 (brand claim); Vacuum Wars cleared a 57 mm single step |
| Pet hair | n/a | Vacuum Wars measured 88% flattened pet hair pickup and 0% hair wrap |
| Best for | very low furniture | low furniture and tall thresholds |
| Skip if | you have mostly carpet or want the best value | 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
Roborock Qrevo Slim
- Tech Advisor: Mostly good on vinyl but missed oats and flour, and left flour and oats on mid pile carpet even after a second max run. It bumped a low hearth and swallowed a large feather, but docked reliably and hair did not wrap the brushes. Source
- TechRadar: Measured noise from about 60 dB on Quiet to 70 dB on Max+, and 44 to 58 dB when mopping. Turbo picked up all the flour and nearly all the oats, while Quiet missed many oats. Hot sauce came off after two passes. It handled thick rugs and raised thresholds but missed edges in zone mode and the area in front of the dock. Source
- Vacuum Wars (3.21 Vacuum Wars stars): Picked up 80% of 2.5 inch pet hair on carpet against a 78% LiDAR robot average and scored 76% on carpet deep cleaning, the best among its peers. Scored 110 on the dried stain test and covered about 1,244 sq ft per charge. It mapped the test home in about 5 min. Raw suction and airflow readings were below average. 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
- CGMagazine (8.5/10): Performed strongly on pet hair, sand and fine dust on carpet and hard floors and fit under low furniture; reviewer flagged middling battery life, a small bin and trouble with loose cables. 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
Pros and cons
Roborock Qrevo Slim
Pros
- Very low 3.23 in body
- Extending side brush and mop for corners
- Offline Hello Rocky voice control
- Hair did not wrap the brushes in testing
- Full self cleaning dock
Cons
- Lower 11,000 Pa suction than newer models
- Weaker on carpet in testing
- Missed small obstacles
- High $1,399.99 price
- Sold out on the Roborock US store on 2026-10-30
Roborock Saros 20
Pros
- Very low 3.14 in body fits under most furniture
- Record threshold climbing in Vacuum Wars testing
- Strong suction and carpet pickup
- Excellent edge cleaning with extending arm and pad
- Dock washes pads in near boiling water
Cons
- Expensive at $1,599.99
- Mopping left streaks in Tom's Guide testing
- Small 260 mL onboard bin
- Still catches cables and gets stuck at times
Questions buyers ask
Which is better, the Roborock Qrevo Slim or the Roborock Saros 20?
The Roborock Saros 20 has a published review score and ranks #39 in our robot vacuums ranking; the Roborock Qrevo Slim is not scored yet. Pick the Roborock Qrevo Slim for very low furniture. Pick the Roborock Saros 20 for low furniture and tall thresholds.
Which is cheaper?
The Roborock Qrevo Slim at $1,400, versus $1,600 for the Roborock Saros 20, checked Oct 31, 2026. Over 3 years with running costs: $1,502 vs $1,600.
What is the difference between the Qrevo Slim and the Saros 20?
Suction: 11,000 Pa (Roborock) on the Qrevo Slim, 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow on the Saros 20. Navigation: StarSight system with solid state 3D ToF LiDAR, optical flow sensor and RGB camera, no… on the Qrevo Slim, StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret on the Saros 20. Obstacle avoidance: 73 object types with 3D sensors and RGB camera (Roborock); Tech Advisor saw it bump a… on the Qrevo Slim, Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects… on the Saros 20.
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