If you have a dead zone, you have two main options: a WiFi extender (also called a range extender or repeater) or a mesh system. They solve the same problem in very different ways, and picking the wrong one wastes money. Here is how to choose.

How a WiFi extender works

An extender catches your existing WiFi and rebroadcasts it farther out. It is cheap and plugs into a wall outlet, but it has two big drawbacks: it often creates a separate network name you have to switch to manually, and because it talks to your router over the same WiFi it rebroadcasts, it can roughly halve throughput on that segment. For the mechanics, see what exactly is a WiFi repeater.

How a mesh system works

A mesh system replaces your router with two or more nodes that act as a single network with one name. Your devices roam between nodes automatically as you move through the house. Better mesh systems use a dedicated backhaul band (or a wired connection) so adding coverage does not gut your speed.

The key differences

  • Network name: extenders often add a second SSID; mesh keeps one seamless network.
  • Roaming: mesh hands devices off automatically; with an extender you may have to switch manually.
  • Speed: a single-band extender can halve throughput; tri-band or wired-backhaul mesh holds speed.
  • Cost: extenders are $20-50; mesh systems start higher but scale cleanly.
  • Setup: both are app-driven now; mesh is generally more polished.

Which should you buy?

Choose a WiFi extender if you have a single stubborn dead spot, a tight budget, and a modern router that is otherwise fine. Choose a mesh system if you have a large or multi-story home, thick walls, many devices, or you want whole-home coverage with seamless roaming. For a buyer's checklist, see how to choose the best mesh WiFi system.

Try the free fixes first

Before buying anything, reposition your router and check your channel - our WiFi optimization guide often recovers a dead zone for free. If you do go mesh and can run an Ethernet cable to a node, wired backhaul is the single biggest speed upgrade you can make.