Roborock Saros 20 vs Roborock Saros 20 Flow
Researched by Riley Hart · prices checked Oct 31, 2026
As of Oct 31, 2026, the Roborock Saros 20 costs $1,600 and the Roborock Saros 20 Flow costs $1,700, so the Roborock Saros 20 is $100 cheaper. The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.8 out of 10). Pick the Roborock Saros 20 for low furniture and tall thresholds. Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds.
- 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 →- Suction
- 36,000 Pa claimed
- Navigation
- Retractable LiDAR
- Mopping
- SpiraFlow 2.0 roller mop
- Runtime
- Not listed in minutes
A top end pick for homes with high thresholds, mostly hard floors and pets, since the roller mop and 3.46 in climbing set it apart. Reviewers praised its mopping and pet hair handling but noted weak corner and edge cleaning. Skip it if you want the cheapest way to get a self cleaning dock.
Full Roborock Saros 20 Flow review →Side by side
| Roborock Saros 20 | Roborock Saros 20 Flow | |
|---|---|---|
| Price | $1,600 | $1,700 |
| 3 year cost | $1,600 | $1,777 |
| Our score | 5.8/10 | 6.4/10 |
| Rank in Floors | #39 | #30 |
| Status | on sale | on sale |
| Warranty | 1 year limited (Roborock US store) | 1 year (Roborock US store) |
| Suction | 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow | 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came out about 90% clean |
| Navigation | StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret | Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side structured light (Roborock) |
| Obstacle avoidance | Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects avoided | Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3 cm wide and 3 cm tall (Roborock); House Digest saw it get lost once |
| Mopping | Yes, dual spinning pads with up to 13 N pressure, FlexiArm extending pad, 20 mm lift on carpet | SpiraFlow 2.0 roller mop, up to 240 rpm, 15 N pressure, 16 pressurized outlets, extends up to 44 mm for edges and lifts up to 15 mm on carpet (Roborock) |
| Self empty | Yes, auto empties into a disposable bag; Roborock says a bag lasts up to 65 days | Yes, auto empty into a bag, up to 65 days without manual emptying (Roborock); bag size not listed |
| Dock features | RockDock washes pads with water up to 212°F, dries at 131°F, auto refills water, doses detergent and dries the dust bag | Roller wash with water up to 212°F, 145°F warm air drying, auto detergent dosing, warm water refill of the robot tank (Roborock) |
| Runtime | 6,400 mAh battery; BGR cites about 200 min per charge and about 150 min to recharge | Not listed in minutes; Roborock says up to 200 m² per charge in standard vacuum and mop mode, 6,400 mAh battery, 150 min full charge |
| Dustbin | 260 mL onboard bin (Vacuum Wars) | n/a |
| Height | 3.14 in (79.8 mm) robot height per Roborock | 3.54 in robot height (Roborock landing page); the store page lists 89.8 mm |
| Pet hair | Vacuum Wars measured 88% flattened pet hair pickup and 0% hair wrap | House Digest said heavy pet fur left no hair balls on the dual anti tangle brushes |
| App | Roborock app with Matter, Alexa and Google Home support plus built in voice control | Roborock app; works with Alexa, Siri, Google Home and Matter; built in Hello Rocky voice assistant (Roborock) |
| Threshold | Up to 3.46 in double layer thresholds with AdaptiLift Chassis 3.0 (brand claim); Vacuum Wars cleared a 57 mm single step | Double layer thresholds up to 3.46 in (88 mm) with AdaptiLift Traverse 3.0 (Roborock); House Digest saw it clear a baby gate with a thud |
| Noise | n/a | No dB figure from Roborock or the reviews we read; House Digest says Carpet Boost is the loudest mode |
| Best for | low furniture and tall thresholds | hard floor homes with tall thresholds |
| Skip if | mopping is your top priority | you are on a budget or need spotless corners |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
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
Roborock Saros 20 Flow
- House Digest (9/10): Floors came out about 90% clean with some crumbs left in corners. Mopping fully removed ketchup and barbecue sauce and left wood almost dry. It cleared a baby gate but got lost once and had underwhelming edge cleaning. Source
- EFTM (92%): Australian review gave vacuuming 93%, mopping 93%, app 92% and features 93%. It cleaned dried jam and tomato sauce, needed two passes for Vegemite and struggled with crumbs near cabinets. Charging was slow. Source
Pros and cons
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
Roborock Saros 20 Flow
Pros
- Roller mop removed ketchup and sauce in testing
- Climbs double thresholds up to 3.46 in
- Dock washes the roller with near boiling water
- Strong pet hair handling with no hair balls
- Matter, Alexa, Siri and Google Home support
Cons
- High price at $1,699.99
- Corner and edge cleaning was weak in reviews
- App settings are hard to find
- Slow 150 min recharge
- Detergent sold separately
Questions buyers ask
Which is better, the Roborock Saros 20 or the Roborock Saros 20 Flow?
The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.8 out of 10). Pick the Roborock Saros 20 for low furniture and tall thresholds. Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds.
Which is cheaper?
The Roborock Saros 20 at $1,600, versus $1,700 for the Roborock Saros 20 Flow, checked Oct 31, 2026. Over 3 years with running costs: $1,600 vs $1,777.
What is the difference between the Saros 20 and the Saros 20 Flow?
Suction: 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow on the Saros 20, 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came… on the Saros 20 Flow. Navigation: StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret on the Saros 20, Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side… on the Saros 20 Flow. Obstacle avoidance: Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects… on the Saros 20, Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3… on the Saros 20 Flow.
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