Roborock Saros 20 Flow vs Roborock Saros Z70
Researched by Riley Hart · prices checked Nov 11, 2026
As of Nov 11, 2026, the Roborock Saros 20 Flow costs $1,700 and the Roborock Saros Z70 has no store price on file. The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.9 out of 10). Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds. Pick the Roborock Saros Z70 for early adopters with mostly hard floors. The Roborock Saros 20 Flow wins 3 of 6 points we can measure (1 tied).
Who wins, point by point
The Roborock Saros 20 Flow wins 3 of 6 points we can measure (1 tied). Built from today's prices, the specs and independent tests for these two robots.
| Saros 20 Flow | Saros Z70 | Winner | |
|---|---|---|---|
| Warranty | 1 year | 1 year | Tie |
| Suction | 36,000 Pa | 22,000 Pa | Saros 20 Flow |
| Runtime per charge | 150 min | 3 h | Saros Z70 |
| Climbs thresholds up to | 3.46 in | 1.57 in | Saros 20 Flow |
| Robot height (fits under furniture) | 3.54 in | 3.14 in | Saros Z70 |
| Release year | 2026 | 2025 | Saros 20 Flow |
- You care most about suction (36,000 Pa vs 22,000 Pa)
- You care most about climbs thresholds up to (3.46 in vs 1.57 in)
- You want the newer model (2026 vs 2025)
- Best for hard floor homes with tall thresholds
- You care most about runtime per charge (3 h vs 150 min)
- You care most about robot height (fits under furniture) (3.14 in vs 3.54 in)
- Best for early adopters with mostly hard floors
- Suction
- 36,000 Pa claimed
- Navigation
- Retractable LiDAR
- Mopping
- SpiraFlow 2.0 roller mop
- Runtime
- Not listed in minutes
Flagship roller mop robot that climbs 3.46 in thresholds
Full Roborock Saros 20 Flow review, pros and cons →- Suction
- 22,000 Pa
- Navigation
- StarSight 2.0 camera
- Mopping
- Yes
- Runtime
- 6,400 mAh battery
Slim Roborock flagship with a folding arm that picks up small items off the floor
Full Roborock Saros Z70 review, pros and cons →Side by side
| Roborock Saros 20 Flow | Roborock Saros Z70 | |
|---|---|---|
| Price | $1,700 | n/a |
| 3 year cost | $1,777 | n/a |
| Our score | 6.4/10 | 5.9/10 |
| Rank in Floors | #43 | #48 |
| Status | on sale | on sale |
| Warranty | 1 year (Roborock US store) | 1 year limited per Roborock US store listings for its other robot vacuums; the Saros Z70 US page was not reachable to confirm |
| Suction | 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came out about 90% clean | 22,000 Pa (brand claim); Vacuum Wars measured 0.3 kPa at the intake, below average, and 16 CFM airflow |
| Navigation | Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side structured light (Roborock) | StarSight 2.0 camera and 3D ToF system with no LiDAR turret |
| Obstacle avoidance | 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 | AI object recognition with VertiBeam side sensing; Vacuum Wars scored 22 of 24 |
| Mopping | 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) | Yes, dual spinning pads with an extending pad, 22 mm lift on carpet, pads detach for vacuum only runs |
| Self empty | Yes, auto empty into a bag, up to 65 days without manual emptying (Roborock); bag size not listed | Yes, into a disposable bag (2.7 L per Vacuum Wars, 2.5 L per TechRadar) |
| Dock features | Roller wash with water up to 212°F, 145°F warm air drying, auto detergent dosing, warm water refill of the robot tank (Roborock) | Washes pads with 176°F water, dries at 131°F, doses detergent; 4 L clean and 3 L dirty tanks |
| Runtime | 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 | 6,400 mAh battery, 180 min official runtime per Vacuum Wars; Vacuum Wars estimated 1,115 sq ft per charge |
| Height | 3.54 in robot height (Roborock landing page); the store page lists 89.8 mm | 3.14 in per Android Authority and Vacuum Wars |
| Pet hair | House Digest said heavy pet fur left no hair balls on the dual anti tangle brushes | Vacuum Wars measured 83% flattened pet hair pickup against a 92% average, and hair still tangled |
| App | Roborock app; works with Alexa, Siri, Google Home and Matter; built in Hello Rocky voice assistant (Roborock) | Roborock app with remote arm control, multi floor maps and pet features |
| Threshold | 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 | Up to 1.57 in (40 mm) per Roborock as reported by Android Authority and TechRadar |
| Noise | No dB figure from Roborock or the reviews we read; House Digest says Carpet Boost is the loudest mode | n/a |
| Dustbin | n/a | 180 mL onboard bin, the smallest Vacuum Wars has tested |
| Best for | hard floor homes with tall thresholds | early adopters with mostly hard floors |
| Skip if | you are on a budget or need spotless corners | you have a lot of carpet |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
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
Roborock Saros Z70
- Vacuum Wars (3.17/5): Lab tests found top tier mopping with a combined score of 269 against a 171 average and 22 of 24 obstacles avoided, but only 67% sand removal from carpet and 83% pet hair pickup; the arm worked about half the time. Source
- TechRadar: Vacuuming was excellent on carpet and lino and mopping strong at edges, but the arm had no fully successful autonomous pickup and the review unit rattled while cleaning. Source
Questions buyers ask
Which is better, the Roborock Saros 20 Flow or the Roborock Saros Z70?
The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.9 out of 10). Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds. Pick the Roborock Saros Z70 for early adopters with mostly hard floors.
What is the difference between the Saros 20 Flow and the Saros Z70?
Suction: 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came… on the Saros 20 Flow, 22,000 Pa (brand claim); Vacuum Wars measured 0.3 kPa at the intake, below average, and… on the Saros Z70. Navigation: Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side… on the Saros 20 Flow, StarSight 2.0 camera and 3D ToF system with no LiDAR turret on the Saros Z70. Obstacle avoidance: Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3… on the Saros 20 Flow, AI object recognition with VertiBeam side sensing; Vacuum Wars scored 22 of 24 on the Saros Z70.
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