Anthbot M9 Pro
For quarter-acre yards with heavy tree cover or tight spaces, where adding LiDAR to RTK is worth the premium over the M9.
Amazon $1,399 Anthbot $1,399$1,399
The Anthbot M9 Pro is the better robot lawn mower overall, rated 4.1 to 3.8. The Anthbot M9 Pro leads on features, warranty and navigation. The Sunseeker S4 wins on value. The Sunseeker S4 costs $247.37 less ($1,151.63 vs $1,399).
Sunseeker S4
#10 in Up to 1/4 acreFull review
For quarter-acre suburban yards with trees or walls that block satellite signal, where a LiDAR mower avoids RTK setup. Yards with steep slopes need an AWD model.
Amazon $1,151.63 Sunseeker $1,279.99$1,151.63
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 Anthbot M9 Pro for features (8 of 8 vs 6 of 8; no 4G, height set in the app), warranty (3-year warranty vs 2-year warranty) and navigation (LiDAR + RTK + vision, no boundary wire vs LiDAR + vision, no boundary wire).
- Choose the Sunseeker S4 for value ($4,610 per rated acre vs $5,600 per rated acre).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 1/4 acre robot lawn mower; a clear win is highlighted. How we rank explains each one.
| Factor weight | Anthbot M9 Pro | Sunseeker S4 |
|---|---|---|
| Overall rating | 4.1/5 | 3.8/5 |
| Value 30% | 71 $5,600 per rated acre | 82 $4,610 per rated acre |
| Navigation 20% | 100 LiDAR + RTK + vision, no boundary wire | 85 LiDAR + vision, no boundary wire |
| Slopes 20% | 36 45% (24°) slopes | 31 42% (23°) slopes |
| Features 15% | 100 8 of 8 | 75 6 of 8; no 4G, height set in the app |
| Warranty 10% | 67 3-year warranty | 33 2-year warranty |
| Noise 5% | 80 58 dB(A) rated | 67 60 dB(A) rated |
Independent tests
Anthbot M9 Pro
No independent test published yet.
Sunseeker S4
| Tested by | Conditions |
|---|---|
| Tom's Guide | On the first cut, a charge lasted about 90 minutes. The test lawn was about 5,875 sq ft in two zones, and the backyard took just under 2 hours of cutting. |
Specifications
| Anthbot M9 Pro | Sunseeker S4 | |
|---|---|---|
| Coverage | ||
| Lawn size (rated) | 0.25 acres (10,900 sq ft) | 0.25 acres (10,900 sq ft) |
| Max slope | 45% (24°) | 42% (23°) |
| All-wheel drive | - | No |
| Run time per charge | - | 1 h 30 min |
| Charge time | - | 1 h 20 min |
| Battery | 5 Ah | 20 V 4 Ah |
| Navigation | ||
| Navigation | LiDAR + RTK + vision | LiDAR + vision |
| Boundary wire needed | No | No |
| RTK station | Included | - |
| Obstacle avoidance | 360° LiDAR + AI cameras | 360° 3D LiDAR + monocular AI camera + bumper |
| Multiple zones | Yes | Yes |
| No-go zones | Yes | Yes |
| Cutting | ||
| Cutting width | 7.9 in (200 mm) | 7 in (178 mm) |
| Cutting height | 1.2–2.8 in (30–70 mm) | 1.6–3.2 in |
| Height adjustment | In the app | By hand (knob) |
| Blades | - | Six pivoting blades on a floating cutting disc |
| Edge mowing | EdgeWiz edge mowing | Ride-on boundary cutting mode |
| Smart features | ||
| Connectivity | 4G (1 year of 4G included) | Wi-Fi, Bluetooth |
| Rain sensor | Yes | Yes |
| Anti-theft | Anti-theft tracking | Optional 4G module with anti-theft tracking |
| Build | ||
| Noise (rated) | 58 dB(A) | 60 dB(A) |
| Water resistance | IPX6 | IPX6 |
| Weight | - | 26 lb (11.8 kg) |
| Warranty | 3 years | 2 years |