Internet Speed Test in Seattle, WA

Internet Providers in Seattle, WA

The main broadband providers in Seattle, WA are Xfinity (Comcast), Quantum Fiber (Lumen), Wave/Astound, and Ziply Fiber. Wave/Astound and Ziply Fiber compete with Xfinity cable and Quantum Fiber in Seattle. Four major providers compete directly in parts of the city.

What Speeds to Expect in Seattle, WA

Seattle has strong broadband competition driven by the tech industry's demands. Ziply Fiber entered the market by acquiring former Frontier infrastructure and has been aggressively deploying fiber throughout the metro.

Typical measured speeds for Seattle, WA residents: 500 Mbps – 2 Gbps. Wi-Fi can easily hide 10–30% of your real line speed. An Ethernet test bypasses that, so anything you see there is a fair benchmark for what your ISP is delivering.

• Fiber: best-in-class symmetry and consistency — upload tracks download, and latency rarely spikes even under load
• Shared-medium plans (cable, DSL, mobile broadband): strong download numbers, but upload and peak-hour stability are the common weak spots
• Comparison rule of thumb: if your wired speed test comes in below 80% of your plan, something in the path — modem, router, line, or provider — is underperforming

ISPs at a glance

Measured speeds are wired-test ranges observed across consumer plans; actual figures depend on plan tier, address, and time of day. Always check each ISP's address-level availability tool for accurate plan and pricing information.

Speed Test Tips for Seattle, WA Residents

• Test on Ethernet to establish a baseline without Wi-Fi interference
• Run tests at both morning (off-peak) and evening (peak) hours — cable networks often slow significantly during prime time
• Check upload speed, not just download — upload is the limiting factor for video calls, live streaming, and cloud backup
• Run 3+ consecutive tests and note the minimum — your calls happen at real-time, not average performance

Frequently Asked Questions

What internet providers serve Seattle?

Xfinity (Comcast) is the largest. Quantum Fiber, Wave/Astound, and Ziply Fiber all provide fiber. Seattle has four-provider competition in many neighborhoods—excellent by US standards.

Is fiber available in Seattle?

Yes—multiple fiber providers serve Seattle. Ziply Fiber covers much of the city. Wave/Astound and Quantum Fiber also have significant coverage. Check your address since provider coverage varies by neighborhood.

What speeds can Seattle residents expect?

Fiber subscribers access 500 Mbps – 2 Gbps. Xfinity cable delivers 300–1200 Mbps. Seattle ranks among the top 15 US cities for broadband quality, driven by tech industry demand.

What is Ziply Fiber and how did it enter the Seattle market?

Ziply Fiber acquired Frontier's Pacific Northwest properties in 2020 and invested heavily in fiber upgrades. It is now a significant competitor to Xfinity and has expanded fiber coverage substantially in Seattle, Portland, and other NW cities.