Greenworks AiMowbot C20Z
#9 in 1/4 to 1 acreFull review
For flat-to-moderate half-acre lawns where a mainstream brand and app-set cutting height matter. It costs more than rivals with similar specs.
Amazon $1,299.99$1,299.99
The Greenworks AiMowbot C20Z is the better robot lawn mower overall, rated 4.0 to 3.0. The Greenworks AiMowbot C20Z leads on navigation, slopes and value. The Greenworks AiMowbot C20Z costs $200 less ($1,299.99 vs $1,499.99).
Worx Landroid L 1/2 Acre (WR155)
#24 in 1/4 to 1 acreFull review
For owners of simple lawns up to 1/2 acre who don’t mind installing a perimeter wire and want a mower that runs on Worx PowerShare batteries.
Worx $1,499.99$1,499.99
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Greenworks AiMowbot C20Z for navigation (RTK + vision, no boundary wire vs Boundary wire), slopes (45% (24°) slopes vs 30% (17°) slopes) and value ($2,600 per rated acre vs $3,000 per rated acre).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 1/4 to 1 acre robot lawn mower; a clear win is highlighted. How we rank explains each one.
| Factor weight | Greenworks AiMowbot C20Z | Worx Landroid L 1/2 Acre (WR155) |
|---|---|---|
| Overall rating | 4.0/5 | 3.0/5 |
| Value 30% | 76 $2,600 per rated acre | 67 $3,000 per rated acre |
| Navigation 20% | 80 RTK + vision, no boundary wire | 10 Boundary wire |
| Slopes 20% | 36 45% (24°) slopes | 9 30% (17°) slopes |
| Features 15% | 100 5 of 5 | 60 3 of 5; no 4G, height set in the app |
| Warranty 10% | 67 3-year warranty | 67 3-year warranty |
| Noise 5% | 100 54 dB(A) rated | 73 59 dB(A) rated |
Specifications
| Greenworks AiMowbot C20Z | Worx Landroid L 1/2 Acre (WR155) | |
|---|---|---|
| Coverage | ||
| Lawn size (rated) | 0.5 acres (21,800 sq ft) | 0.5 acres (21,780 sq ft) |
| Max slope | 45% (24°) | 30% (17°) |
| All-wheel drive | No | No |
| Battery | - | 20 V 5 Ah |
| Navigation | ||
| Navigation | RTK + vision | Boundary wire |
| Boundary wire needed | No | Yes |
| Obstacle avoidance | AI cameras + ToF camera + night-vision sensors (200+ object types) | - |
| Multiple zones | Yes | Yes |
| No-go zones | Yes | - |
| Cutting | ||
| Cutting width | 7.9 in (200 mm) | 8 in (203 mm) |
| Cutting height | 0.8–3.5 in | 1.5–3.5 in |
| Height adjustment | In the app | By hand (knob) |
| Blades | - | 3 blades on a self-leveling disc |
| Edge mowing | Edge mowing to within 4 in | Cut-to-Edge border cutting |
| Smart features | ||
| Connectivity | - | Wi-Fi, Bluetooth |
| Rain sensor | - | Yes |
| Build | ||
| Noise (rated) | 54 dB(A) | 59 dB(A) |
| Water resistance | IPX6 | - |
| Weight | - | 25.8 lb (11.7 kg) |
| Warranty | 3 years | 3 years |