WiFi Router vs Modem: What’s the Difference and Do You Need Both?
WiFi Router vs Modem: What’s the Difference and Do You Need Both?
Published on 05/15/2025. Edited by Asai Andrade.
If you're setting up your home internet, you might wonder, do I need a modem, a router, or both? The answer depends on what each device does. Let’s clear up the confusion.
What is a Modem?
A modem is your gateway to the internet. It connects to your Internet Service Provider (ISP) through a coaxial, DSL, or fiber line and converts that signal into a digital format your home network can use.
Think of a modem like a translator. It speaks the language of your ISP and converts it to something your devices can understand.
What is a Router?
A router takes the internet connection from your modem and shares it with your devices. Either wirelessly (WiFi) or via Ethernet. It’s responsible for managing all the devices in your home network.
- Wireless connectivity: Sends internet to phones, laptops, TVs, etc.
- Security: Acts as a firewall and can include parental controls or guest networks.
- Network management: Controls how bandwidth is distributed.
Do You Need Both?
Yes, unless you use a combo device. Most homes need both a modem and a router. Some devices combine the two, but separate units often perform better, especially when you want to upgrade your WiFi.
Not Sure What You Need? Start With a Speed Test
Check your current internet speed to see if it’s your modem, your router or your plan holding you back.
Run the WiFi Speed Test →Modem vs Router: Key Differences
| Feature | Modem | Router |
|---|---|---|
| Connects to ISP | ✅ | ❌ |
| Provides WiFi | ❌ | ✅ |
| Distributes to devices | ❌ | ✅ |
| Needed for internet? | Yes | Yes (for WiFi) |
| Combo devices? | Available | Available |
Budget-Friendly Picks
Here are some great value devices whether you want a combo unit or prefer separate ones:
- Modem: ARRIS SURFboard SB6183 – Solid DOCSIS 3.0 modem.
- Router: TP-Link AX1800 – WiFi 6 under $100
- Combo: NETGEAR Nighthawk C7000 – 2-in-1 modem + router combo for simplicity.
Some links in this comparison are affiliate links. We may earn if you buy, but it won’t cost you anything extra. 🔗
Final Thoughts
You can’t have WiFi without a router. But you also can’t reach the internet without a modem.
In short: you usually need both. But depending on your setup, a combo unit might simplify things. For performance and future upgrades, separate devices give you more flexibility.