Most robotic lawn mowers still fall into two camps: they either need a boundary wire you bury or peg along the edge, or they advertise wire-free navigation using cameras, LiDAR, RTK/GPS, or a mix. Neither is automatically “better”; your lot, budget, and patience for setup matter more than marketing labels.
Boundary-wire robot mowers
A buried or pinned wire tells the mower exactly where to stop. Pros: predictable edges on complicated shapes, fewer arguments with flower beds if the wire is placed carefully, and often lower purchase price than premium wire-free units. Cons: first-time install takes time, you may need repairs if the wire breaks, and moving boundaries means re-doing wire work.
If you want a compact urban lawn and are fine installing a kit, a wire-based robot mower for sale is still a solid default—example listings include models like the Gardena SILENO City #AD (verify coverage for your square footage on the product page).
Wire-free (perimeter-free) robot mowers
Wire-free machines try to learn or map your lawn without a continuous loop. Vision-heavy units care about lighting and obstacles; RTK/GPS setups may need clear sky view or reference stations. Pros: no trenching, easier if you rent or expect to move. Cons: steeper learning curve in the app, edge cutting may need tweaking, and not every yard is a good match for every sensor stack—tight passages, heavy shade, or metal fences can matter.
Quick decision hints
- Odd-shaped beds and islands: wire or a wire-free system with proven multi-zone mapping—read recent reviews for your lawn size.
- Small flat lot, simple rectangle: boundary wire is often the cheapest path to a boring, reliable schedule.
- You hate DIY: hire help for wire install, or budget more for a wire-free model and expect a few weeks of tuning.
When you’re ready to shop, our robotic mower directory lists wire-free and wire-based robot mowers for sale with retailer links. If you’d rather push mow yourself, the electric push mower list is the companion page for walk-behind battery and corded models.
Related: Choosing an electric mower (corded vs battery walk-behinds).