Anthbot M9
For flat, tidy quarter-acre lawns on a budget, where it cuts neatly and quietly. Bumpy or overgrown yards will frustrate it.
Amazon $829 Anthbot $769$769
The Anthbot M9 rates 4.3 among up to 1/4 acre robot lawn mowers; the Sunseeker X3 Plus rates 3.6 among 1/4 to 1 acre ones. The Anthbot M9 costs $67.98 less ($769 vs $836.98).
Sunseeker X3 Plus
#15 in 1/4 to 1 acreFull review
For small, fairly flat, open suburban lawns where buyers want wire-free mowing on a budget. Hilly or heavily shaded yards should look elsewhere.
Amazon $836.98 Sunseeker $999.99$836.98
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.
Scores side by side
These two sit in different size classes (up to 1/4 acre and 1/4 to 1 acre), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Anthbot M9 | Sunseeker X3 Plus |
|---|---|---|
| Overall rating | 4.3/5 | 3.6/5 |
| Value 30% | 99 $3,080 per rated acre | 71 $2,790 per rated acre |
| Navigation 20% | 80 RTK + vision, no boundary wire | 80 RTK + vision, no boundary wire |
| Slopes 20% | 36 45% (24°) slopes | 9 30% (17°) slopes |
| Features 15% | 100 8 of 8 | 100 5 of 5 |
| Warranty 10% | 67 3-year warranty | 33 2-year warranty |
| Noise 5% | 80 58 dB(A) rated | 50 noise not published (neutral score used) |
Independent tests
Anthbot M9
| Tested by | Conditions |
|---|---|
| Notebookcheck | Covered almost 300 m² per charge. Recharging took about 2 hours, with just under 110 Wh drawn (peak 55 W) and about 7 W on standby. The cutting disc sits about 9 cm in from the body edge, which leaves an uncut strip. It struggled on rough or uneven ground. |
Sunseeker X3 Plus
No independent test published yet.
Specifications
| Anthbot M9 | Sunseeker X3 Plus | |
|---|---|---|
| Coverage | ||
| Lawn size (rated) | 0.25 acres (10,900 sq ft) | 0.3 acres (13,100 sq ft) |
| Max slope | 45% (24°) | 30% (17°) |
| Battery | 5 Ah | - |
| Navigation | ||
| Navigation | RTK + vision | RTK + vision |
| Boundary wire needed | No | No |
| RTK station | - | Included |
| Obstacle avoidance | Dual 150° HDR AI cameras | AI camera + ultrasonic |
| Multiple zones | Yes | Yes |
| No-go zones | Yes | Yes |
| Cutting | ||
| Cutting width | 7.9 in (200 mm) | 8 in (203 mm) |
| Cutting height | 1.2–2.8 in (30–70 mm) | 1.6–3.2 in |
| Height adjustment | In the app | - |
| Blades | 5 free-rotating blades on a 20 cm disc | Offset blade disc |
| Edge mowing | On-edge mowing mode | Ride-on-edge cutting with offset blade disc |
| Smart features | ||
| Connectivity | 4G | - |
| Rain sensor | Yes | - |
| Anti-theft | GPS tracking with alerts when the mower leaves its zone | GPS tracking and geofence alerts |
| Build | ||
| Noise (rated) | 58 dB(A) | - |
| Water resistance | IPX6 | - |
| Warranty | 3 years | 2 years |