The Best Wet-Cleaning Robots for Small Shops 2026

Introduction

For a small retail shop, the floor is cleaned either at the start or end of the day, and typically this is done by the same people who attend to customers. Floor mopping takes a lot of time that small teams do not always have, and narrow aisles between the shelves mean that bigger machines are not feasible. A small robot for wet cleaning can help only if it manages to clean well, access narrow aisles, and reduce the amount of time spent by staff on setting up and servicing the machine.

This ranking evaluates the PUDU ET1, Gausium Phantas, and KEENON KLEENBOT C20 robots for this application. All three are small enough for small retail shops; what they differ in is the extent to which they automate the process of water usage and maintenance.

The criteria are evaluated on a scale from 1 to 10 with regard to: wet cleaning capacity, autonomous operation, narrow routing capacity, station servicing and maintenance. Total scores and ranking are provided based on ROBOT24’s desk review methodology.

AT A GLANCE

Rank	Robot	Overall score	Standout specification	Best suited to
1	PUDU ET1	84.5/100	8-in-1 station with hot-water refill and auto drainage; 50 cm aisles	Shops that want the most hands-off water routine
2	Gausium Phantas	82.0/100	4-in-1 cleaning with optional automatic workstation	Shops with plumbing access or a back room for a station
3	KEENON KLEENBOT C20	78.5/100	35 cm-high body for cleaning under tables	Compact layouts where reaching under tables matters

The Robots Behind the Rankings

1. PUDU ET1: The most automated option

Overall score: 84.5/100

The PUDU ET1 takes first place with the strongest wet-cleaning score in the group, 9/10. Launched in August 2026 as the first model in PUDU’s new E Series, it is built specifically for commercial spaces of about 100 to 800 m², such as convenience stores, drugstores and small restaurants.

It combines sweeping, vacuuming, scrubbing and dust-mopping, with dry debris picked up at the front and scrubbing at the rear. Its docking station can fill it with water at up to 85°C, which PUDU says helps lift grease and sticky residue, and the robot recovers dirty water quickly to leave floors dry behind it. PUDU lists 8-litre clean and 7.2-litre waste tanks and a 30 cm scrubbing width.

Its biggest advantage for small shops is servicing. PUDU describes an 8-in-1 station that handles charging, clean-water refill, waste-water drainage, detergent dosing, roller and squeegee rinsing, roller spin-drying and water heating, plus automatic dust collection that PUDU says needs emptying about once a week. It scores 9/10 for narrow-route access, with a 50 cm minimum aisle width, and 8/10 for autonomous operation, station servicing and upkeep.

2. Gausium Phantas: The proven compact all-rounder

Overall score: 82.0/100

The Gausium Phantas finishes second, 2.5 points behind the ET1. It matches the ET1 on autonomous operation, narrow-route access, station servicing and upkeep, and trails only on wet cleaning, at 8/10.

Like the ET1, it is a 4-in-1 robot that vacuums, sweeps, scrubs and dust-mops. Gausium lists a 330 mm scrubbing width and a 600 mm minimum operating width, which sellers say can be reduced to 550 mm through a software update. TASKI, which sells a version of the Phantas, lists up to 4.5 hours of scrubbing per charge and a full recharge in about 2 hours.

Its servicing depends on the station chosen. The Phantas docks automatically to charge, and Gausium offers workstations that add automatic water handling; the WS-03 needs a water supply, a floor drain and power. Where plumbing is not available, Gausium also offers a mobile water tank. Shops should compare the station options side by side, because they change both the price and how much of the routine is automated.

The Phantas suits small shops with plumbing access or a back room where a workstation can be installed.

3. KEENON KLEENBOT C20: Compact, with more hands-on servicing

Overall score: 78.5/100

The KEENON KLEENBOT C20 completes the ranking, 6 points behind the leader. It earns the only perfect score in this comparison, 10/10 for narrow-route access, but trails on wet cleaning and servicing.

Its access score rests on its compact body. KEENON lists the C20 at 523 × 400 × 351 mm, so at 35 cm high it is far lower than the other two robots and can clean under tables and some low fixtures. Its minimum passage width is 60 cm. KEENON describes it as a 4-in-1 machine that sweeps, vacuums, scrubs and dries.

Its lower scores are for wet cleaning, station servicing and upkeep, each at 7/10. The reviewed documentation does not describe the same level of station automation as the ET1, so shops should expect more manual filling, emptying and cleaning, and confirm exactly what its station handles.

The KLEENBOT C20 suits very compact shops where getting under counters and tables matters more than full station automation.

The Best Fit Depends on the store

Optimum depends on service requirements and space considerations
The best robots in this category are the PUDU ET1 and Gausium Phantas robots for businesses wishing to automate their servicing process. ET1 is better at wet cleaning, provides the most automated station, and Phantas is an already proven option, providing different types of stations to choose from. However, KEENON KLEENBOT C20 is the smallest of these robots but requires more servicing.

In a small shop, the station is as important as the robot itself. An automated station will provide great convenience by allowing refilling and drainage without any effort on the part of staff daily but will take space and will require a water supply and drain connection. It is better to measure the available space including that of the station rather than only the robot.

Comparing prices, one should include all the accessories for each type of robot – the station, the water tank (if any), the plumbing kit (if any), additional displays, and other options the shop will use.

RANKING EXPLAINED

Parameter	What we assess	Weight
Wet cleaning	Scrubbing performance, water recovery and how dry and streak-free the floor is left.	25%
Autonomous operation	Mapping, navigation, scheduling and how little staff need to intervene.	25%
Narrow-route access	Ability to clean narrow aisles and reach under tables and fixtures.	20%
Station servicing	What the station automates: charging, refill, drainage, detergent and self-cleaning.	15%
Upkeep	Day-to-day staff effort for emptying, rinsing, filters and brushes.	15%

Each criterion is scored out of 10, and the weighted scores combine into an overall score out of 100. Wet cleaning and autonomous operation carry the most weight because they decide whether the floor is properly cleaned without staff stepping in.

SCORING DETAIL

Robot	C1: Wet cleaning	C2: Autonomous operation	C3: Narrow-route access	C4: Station servicing	C5: Upkeep	Overall score
PUDU ET1	9	8	9	8	8	84.5/100
Gausium Phantas	8	8	9	8	8	82.0/100
KEENON KLEENBOT C20	7	8	10	7	7	78.5/100

These scores are editorial assessments based on ROBOT24.com market data records.They are not the result of matched-condition independent testing. Real-world performance will vary with floor type, shop layout, soiling, station setup and configuration. Station footprint, plumbing needs, optional equipment and support terms should be confirmed with the manufacturer or supplier before purchase.