Greenworks AiMowbot C20 vs Greenworks Optimow 33H
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Quick take: The Greenworks AiMowbot C20 costs $101 less; the Greenworks AiMowbot C20 skips the boundary-wire install entirely while the Greenworks Optimow 33H needs a perimeter wire laid but doesn't care about tree cover or satellite signal; the Greenworks AiMowbot C20 is rated for a larger lawn (0.5 acres); the Greenworks AiMowbot C20 is rated for steeper ground (45%); the Greenworks Optimow 33H cuts taller (up to 4"), which matters for fescue and warm-season grasses.
| Spec | Greenworks AiMowbot C20 | Greenworks Optimow 33H |
|---|---|---|
| Price | ~$998 | ~$1,099 |
| Rating | 3.1★ (45) | — |
| Navigation | RTK + Vision | Boundary Wire |
| Max Lawn Size | 0.5 acres (21,780 sq ft) | 14,520 sq ft (14,520 sq ft) |
| Max Slope | 45% (24°) | 34% (19°) |
| Cutting Width | 8" | 8.7" |
| Cut Height | 0.75"–3.5" | 2.4"–4" |
| Drive | FWD | RWD |
| Runtime | — | — |
| Charge Time | — | 130 min |
| Noise | 54 dB | — |
| Weight | 26.2 lb | 26.4 lb |
| Obstacle Detection | Smart cameras plus night-vision sensors that Greenworks says recognize 200-plus obstacle types, with a bumper and LED headlights for night mowing. | Bumper collision sensors and lift/tilt stops only; no camera or ultrasonic, so it bumps and turns. |
| Edge Cutting | No | No |
| Rain Sensor | No | Yes |
| Cellular | Yes | Yes |
| Anti-Theft | Account-locked operation plus an alarm when it leaves the mapped area; GPS tracking when the 4G plan is active | PIN code, lift alarm and 4G GPS tracking |
| Warranty | 3-year limited | 4-year limited (confirm with dealer) |
Pros & cons
Greenworks AiMowbot C20
- ✓Cheapest RTK plus camera mower from a US big-box brand
- ✓45% slope rating beats most 2WD RTK rivals
- ✓Very quiet at 54 dB and hose-washable (IPX6)
- ✓Electric cut-height adjustment from 0.75 to 3.5 in covers warm- and cool-season grass
- ✓26 lb body is easy to carry between zones
- ✓3-year warranty with Walmart returns
- ✗3.1 out of 5 from 45 Walmart ratings in its first season
- ✗4G and anti-theft tracking need a subscription with no published price
- ✗No published runtime or charge time, and edge cutting stops about 4 in short of borders
Greenworks Optimow 33H
- ✓High-cut 2.4-4.0 in range is right for fescue and bluegrass
- ✓4G plus GPS built in, so the app works away from home Wi-Fi
- ✓Proven wire-and-guide-wire platform with a wide dealer network
- ✓Long consumer warranty on the Optimow line
- ✗Dealer-only and sold out online; pricing and stock vary by dealer
- ✗GreenGuide app draws consistent complaints from Optimow owners
- ✗Cellular plan renews for a fee after the prepaid period
- ✗No edge mode and no camera obstacle avoidance
- ✗Random pattern and 130-minute charges make it slow on a full third acre