Greenworks
Comparison · 2 robots
Greenworks Optimow 15 · Worx Landroid M 20V
All robot lawn mowers. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.
- Greenworks Optimow 15
- Worx Landroid M 20V
01 Classification
What each one does on its own.
The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.
V
Generalized
Any task, any setting
IV
Environmental
Handles new obstacles without help
III
Conditional
Finishes familiar jobs on its own
II
Assisted
Runs preset routines, needs rescue
Greenworks Optimow 15Worx Landroid M 20V
I
Manual
One action, on command
02 Assessment
Where they actually differ.
The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.
Capability
Task completion16% of score
Does it finish the job it is sold to do, unattended
7585
- Greenworks Optimow 1575
- Worx Landroid M 20V85
18median 72 across 429 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
5550
- Greenworks Optimow 1555
- Worx Landroid M 20V50
0median 70 across 417 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
6550
- Greenworks Optimow 1565
- Worx Landroid M 20V50
18median 52 across 318 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
7650
- Greenworks Optimow 1576
- Worx Landroid M 20V50
28median 68 across 393 scored robots100
Dependability
Field failure rate16% of score
Documented hardware failures per owner-year
6491
- Greenworks Optimow 1564
- Worx Landroid M 20V91
6median 70 across 355 scored robots100
Software stability14% of score
Whether updates fix more than they break
8274
- Greenworks Optimow 1582
- Worx Landroid M 20V74
15median 65 across 340 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
5893
- Greenworks Optimow 1558
- Worx Landroid M 20V93
0median 62 across 425 scored robots100
Ownership burden
Routine maintenance12% of score
Hands-on time it asks for in normal operation
4364
- Greenworks Optimow 1543
- Worx Landroid M 20V64
22median 67 across 430 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
7671
- Greenworks Optimow 1576
- Worx Landroid M 20V71
8median 69 across 430 scored robots100
03 Measured against the class
How far apart is a long way?
A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.
Charge time106 with a published figure
70 min90 min
- Greenworks Optimow 1570 min
- Worx Landroid M 20V90 min
30 minmedian 90 min300 min
Noise104 with a published figure
50 dB59 dB
- Greenworks Optimow 1550 dB
- Worx Landroid M 20V59 dB
50 dBmedian 60 dB82 dB
Weight116 with a published figure
24.3 lbs29.8 lbs
- Greenworks Optimow 1524.3 lbs
- Worx Landroid M 20V29.8 lbs
13 lbsmedian 30 lbs134 lbs
Height117 with a published figure
10.2 in10.4 in
- Greenworks Optimow 1510.2 in
- Worx Landroid M 20V10.4 in
7.5 inmedian 11 in16.5 in
Not compared, because fewer than two of these robots carry a published figure: Price, Suction, Runtime.
04 Ownership
What the numbers leave out.
The trade-off
What each design gives up to be good at what it is good at.
Greenworks Optimow 15
Wire installation is the price of entry: the Optimow 15 delivers genuine unsupervised mowing, but only after the owner commits several hours to perimeter-wire layout and staking.
Randomized cutting works, but systematic GPS-based mowing completes large areas faster and with more predictable pass distribution; the Optimow 15 trades path efficiency for a lower price tier.
Worx Landroid M 20V
Boundary wire containment eliminates extension cord tethering but locks mower to fixed yard geometry.
Cordless runtime provides freedom from outlets and gas but limits mowing area to 0.33 acres per charge cycle.
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.
Greenworks Optimow 15
- Yards exceeding 1,500 m² (0.37 acres)
- The 1,500 m² coverage ceiling is a documented hard limit. Larger properties require a higher-capacity model; exceeding the rated area results in incomplete coverage cycles.
- Owners who cannot or will not install perimeter wire
- The Optimow 15 requires perimeter wire for all boundary definition. No GPS or camera-based wire-free operation is supported. Wire installation is mandatory, not optional.
- Properties with dense obstacles or numerous internal garden beds
- Randomized-pattern mowers lack systematic zone mapping. Dense obstacle fields or numerous internal garden beds require extensive guide-wire loops, adding installation complexity and wire-break risk.
- Slopes exceeding 35% or areas with loose surface conditions
- The 35% gradient rating is the published hard limit. Steeper sections or slopes with wet clay at the boundary are outside the documented operating envelope.
- Households requiring Wi-Fi or local-network integration
- Connectivity runs over GSM (cellular module), not home Wi-Fi. Smart-home integrations dependent on local Wi-Fi are not supported on this model.
Worx Landroid M 20V
- Yards larger than a quarter acre
- Both US Landroid M models are rated for 1/4 acre. Larger properties fall outside the rated coverage and need multiple mowing days or a larger machine.
- Frequently changing yard layouts
- Boundary wire assumes fixed perimeter. Adding beds, pools, or storage sheds mid-season requires wire rerouting.
- Sloped or hilly terrain
- Worx rates the US Landroid M at 20 degrees, or 35 percent, on the WR140 page, and 30 percent, about 17 degrees, on the WR147 page. Ground beyond the rating for your unit risks stalling and manual retrieval.
- Owners opposed to mulching discharge
- No bagging or side-discharge option. Mulch-only operation unsuitable for allergies or aesthetic preferences.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
Greenworks Optimow 15
- After every use: Visually inspect blade disc for damage or grass clogging.
- Weekly: Clear accumulated clippings from the chassis underside and blade housing.
- Monthly: Inspect boundary wire and pegs along the full perimeter; re-stake any lifted sections.
- Every 3-6 months: Replace blade disc or individual blades; standard Greenworks Optimow replacement parts.
- Seasonally: Clean charging contacts on dock and mower body; verify boundary wire continuity before mowing season.
- Annually: Full perimeter wire inspection; replace degraded sections; charge battery to storage level before winter.
Worx Landroid M 20V
- After every use: Inspect the wheels for wrapped grass and debris.
- Weekly: Check boundary wire for physical damage or corrosion; test dock charging connection.
- Monthly: Clear compacted clippings from the underbody and check that the cutting disc turns freely.
- As blades wear: Rotate and flip all three blades together, then replace the full set. A spare set ships in the box; replacements sell twelve to a kit (WA0190).
- Every 3–6 months: Inspect battery contacts for corrosion; clean charging dock connectors.
- Annually: Replace boundary wire if exposed to winter salt or damage; service wheel bearings.
05 Evidence
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 |
|---|---|---|---|
| Greenworks Optimow 15 | Pending | — | Aug 2026 |
| Worx Landroid M 20V | Pending | 3 | Aug 2026 |
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