HOBOT
Hobot 298
- Autonomy
- IIAssisted
- Score
- 65/100Capable
- Readiness
- Ready Now
- Price
- $249list
ComparisonHobot 298 and Mamibot iGLASSBOT W120-T
Mamibot
Mamibot iGLASSBOT W120-T
- Autonomy
- IIAssisted
- Score
- 53/100Limited
- Readiness
- Ready Now
- Price
- $179list
Up to three
Autonomy Ladder
- IManual
- IIAssisted
- IIIConditional
- IVEnvironmental
- VGeneralized
All robot window cleaners. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.
Where each one suits you.
The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.
| Condition | Hobot 298 | iGLASSBOT W120-T |
|---|---|---|
| Window style | ||
| Standard residential | GoodOptimized for 6-12 sq ft panes on standard residential frames. Ultrasonic spray performs consistently across typical glass. | GoodFlat glass panes are the design target. Auto-path performs reliably on standard rectangular windows. |
| Large panes (8 ft+) | DependsSquare pad (5×5 in) leaves corner gaps on panes above 15 sq ft. Multiple passes or manual corner cleaning typical. | DependsWater reservoir capacity limits single-mount coverage to approximately 16 sq ft; repositioning required for larger panes. |
| Specialty / texturedthey differ | DependsCurved or heavily tinted tempered glass challenges edge detection. Optical sensors less reliable; manual intervention increases. | PoorCurved, tempered, or unusual geometries cause suction loss. Unit is rated for standard flat glass only. |
| Frame style | ||
| Frameless / minimalthey differ | DependsFrameless glass reduces optical contrast for edge detection. Robot may drift or reposition unpredictably without visual boundary. | GoodFrameless glass relies on suction seal alone; the W120-T is designed for direct glass-surface attachment. |
| Standard mullions | GoodStandard wood, aluminum, or vinyl frames provide clear visual boundaries. Vacuum edge detection works reliably. | GoodStandard framed windows allow rope anchoring to the frame. Manufacturer design assumes frame-mounted tether point. |
| Heavy bezels | DependsMetal frames with deep recesses trap moisture and spray residue. Frequent inspection needed to prevent water pooling and motor intake clogging. | DependsHeavy or aluminum frames may complicate rope routing and tether anchor points; rope must clear frame edges safely. |
| Building height | ||
| Single-story | GoodGround-level and platform-accessible windows are primary use case. Safety and power cord management straightforward. | GoodGround-level windows require no cable extension. Power outlet and tether point management are straightforward. |
| 2 – 3 storiesthey differ | GoodSecond-story windows (15-20 ft) feasible with careful rope rigging and power cord routing from extension outlet. | Depends2-3 story access requires extension cord management. Tether length and cable routing add setup complexity. |
| 4+ storiesthey differ | DependsHeights above 25 feet stretch cable runs and suction reliability limits. External anchor and secondary tether strongly recommended. | PoorUpper-floor windows exceed practical tether and power cable reach. Height access beyond third story is not recommended. |
| Power preference | ||
| Corded OK | Good30-meter power cable with outdoor-rated connector. Requires outlet access; extension cord use discouraged by manufacturer. | GoodW120-T is mains-powered and designed for corded operation. Proximity to power outlet is the only constraint. |
| Cordless preferred | PoorHobot 298 is corded only; no battery option available. | PoorUnit has no battery option. Cordless-only requirement is incompatible with this model's design. |
| No preference | GoodCorded operation is standard; cordless alternative not offered by manufacturer. | GoodCorded operation is the only available mode. Users flexible on power source will find it suitable. |
A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.
What the score is built from.
Nine inputs across three pillars, each weighted as shown and each scored so more is better. A robot can lead on one and trail on another, which is the point of showing them apart.
Capability
Task completion16% of score
Does it finish the job it is sold to do, unattended
5875
- Hobot 29858
- Mamibot iGLASSBOT W120-T75
18median 72 across 433 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
5270
- Hobot 29852
- Mamibot iGLASSBOT W120-T70
0median 70 across 421 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
5655
- Hobot 29856
- Mamibot iGLASSBOT W120-T55
18median 52 across 320 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
5738
- Hobot 29857
- Mamibot iGLASSBOT W120-T38
28median 68 across 397 scored robots100
Dependability
Field failure rate16% of score
Documented hardware failures per owner-year
8570
- Hobot 29885
- Mamibot iGLASSBOT W120-T70
6median 70 across 359 scored robots100
Software stability14% of score
Whether updates fix more than they break
7133
- Hobot 29871
- Mamibot iGLASSBOT W120-T33
15median 65 across 342 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
8230
- Hobot 29882
- Mamibot iGLASSBOT W120-T30
0median 62 across 429 scored robots100
Ownership burden
Routine maintenance12% of score
Hands-on time it asks for in normal operation
3225
- Hobot 29832
- Mamibot iGLASSBOT W120-T25
22median 67 across 434 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
6669
- Hobot 29866
- Mamibot iGLASSBOT W120-T69
8median 69 across 434 scored robots100
How far apart is a long way?
A number only means something next to the spread it sits in. Each track is the real range across every classified robot in the class, with the median marked.
Price21 with a published figure
$249$179
- Hobot 298$249
- Mamibot iGLASSBOT W120-T$179
$150median $349$850
Adhesion (mode not stated)19 with a published figure
2,800 Pa2,800 Pa
- Hobot 2982,800 Pa
- Mamibot iGLASSBOT W120-T2,800 Pa
2,800 Pamedian 3,800 Pa10,000 Pa
Noise20 with a published figure
65 dB65 dB
- Hobot 29865 dB
- Mamibot iGLASSBOT W120-T65 dB
63 dBmedian 68 dB75 dB
Weight22 with a published figure
2.6 lbs3 lbs
- Hobot 2982.6 lbs
- Mamibot iGLASSBOT W120-T3 lbs
1.3 lbsmedian 3.1 lbs4.8 lbs
Height24 with a published figure
3.5 in3.9 in
- Hobot 2983.5 in
- Mamibot iGLASSBOT W120-T3.9 in
2.2 inmedian 3.2 in9.4 in
Not compared, because fewer than two of these robots carry a published figure: Runtime, Charge time.
What the numbers leave out.
Written on each record, and the only thing here every robot on the site carries.
The trade-off
What each design gives up to be good at what it is good at.
Hobot 298
Mains power removes recharge cycles, and an embedded UPS holds the robot in place for 20 minutes through an outage, but the 4 meter cord ties the machine to a socket within a few paces of the pane.
Mamibot iGLASSBOT W120-T
Auto-path on uniform framed glass is reliable; suction on textured panes and the manual’s outright prohibition on frameless glass are the binding constraints, not cleaning quality.
Sub-$200 dual-pad scrubbing is accessible, but rope anchoring, hand-wetted pads and per-panel remounting keep the owner in the loop every session.
Who each one is wrong for
Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.
Hobot 298
- High-rise or multi-story installations requiring extended reach
- The power cord is 4 meters and the supplied safety rope is 4.5 meters, so both the socket and the rope's indoor anchor point have to sit close to the pane being worked. Windows further from an interior socket than that are outside what this model reaches.
- Homes without adjacent power outlets or outdoor outlets within cable run
- Extension cord use is discouraged by manufacturer for safety. Interior outlet management becomes critical; wet-environment electrical safety is owner's responsibility.
- Specialty or curved glass surfaces
- Square pad geometry and fixed nozzle positioning leave corners uncleaned. Tempered or heavily tinted windows challenge optical edge detection; manual repositioning is frequent.
Mamibot iGLASSBOT W120-T
- Frameless glass, and textured, frosted or curved surfaces
- Mamibot's manual prohibits use on frameless glass outright, which is the flat case owners most often assume is fine. Suction loss on textured and frosted surfaces is separately documented across owner reports.
- Users expecting fully autonomous multi-panel cleaning runs
- The unit is remounted and the rope re-anchored between separate panels. There is no dock, no multi-panel routing and no resume.
- Homes with upper-floor windows far from power outlets
- The unit is mains-powered and ships with an adapter and extension cable. Windows beyond that run are impractical, and the tether sets the working height as much as the glass does.
- Owners needing cordless battery-only operation
- The W120-T runs from mains power. The 600 mAh cell on board is a backup that holds the unit on the glass if power is cut, not a runtime battery, so use is restricted to windows near an outlet.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
Hobot 298
- Weekly: Rinse pad and inspect nozzle for mineral deposits; test suction by listening for motor speed consistency.
- Monthly: Clean intake ports and motor filter with soft brush; soak nozzle in distilled vinegar if spray pattern weakens.
- Every 3-4 months: Replace cleaning pads (~$20-25 per pair); inspect power cable for insulation damage.
- Annually: Replace motor intake filter (~$15); deep-clean nozzle assembly by soaking in 50/50 vinegar-water solution.
- As needed: Replace vacuum motor assembly if suction falls below specification (~$80, typical at 5-6 year mark with regular use).
Mamibot iGLASSBOT W120-T
- Before every use: Confirm the backup battery is fully charged, and tie the safety rope to a secure indoor fixture.
- After every use: Rinse and wring the microfiber pads; allow to air-dry before storage.
- Weekly: Inspect the safety rope along its length for fraying, and check the fixture it is tied to.
- Monthly: Wipe the suction cup and intake filter with a damp cloth to maintain seal integrity. Do not spray or pour water onto the device.
- Every 30-50 sessions: Replace the microfiber cleaning pads (sold separately).
- As needed: Inspect the power cable and connector for wear near strain-relief points.
How much each of these is standing on.
Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| Hobot 298 | Provisional | 4 | Aug 2026 |
| Mamibot iGLASSBOT W120-T | Pending | 5 | Aug 2026 |
Evidence status counts the sources behind a classification, not their kind. A high count can be maker documentation and price coverage, so read it as how much was reviewed rather than as independent testing. How we weigh evidence.
Keep going.
The full recordHobot 298Specifications, evidence, the Fit Check in full, and every tracked change.
The full recordMamibot iGLASSBOT W120-TSpecifications, evidence, the Fit Check in full, and every tracked change.Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.
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