Company / About
About InternetSpeedX
Last updated: November 2026
InternetSpeedX is a free internet speed test and a library of practical guides for people whose home internet isn't doing what it should. You can check your speed in about 30 seconds, see what the numbers mean for your plan, and follow step-by-step fixes when something is wrong.
Why we built it
Most speed tests give you a number and stop there. A number alone doesn't tell you whether 380 Mbps is good on a 500 Mbps plan, whether the problem is your WiFi or your provider, or what to do next. We built InternetSpeedX to answer those questions on the same page as the test.
What we cover
- Xfinity speed test: our main tool, with plan comparisons, the Xfinity app test, and fixes for slow Xfinity and Comcast internet.
- Guides: in-depth articles on slow internet, WiFi, upload speed, ping and home network setup.
Who writes our content
Our guides are researched and written by Tino Ropar, a Computer Science graduate and technology researcher, and reviewed for technical accuracy by Marco Elizondo. We base every step on the provider's own support documentation and current plan information, check the steps on real home connections, and review pages regularly. You can read exactly how the test works and how we check our content on our How we test page.
Independence
InternetSpeedX is independent. We are not affiliated with, endorsed by or paid by Comcast, Xfinity or any other internet provider. Provider names are used only to describe the services our guides cover. We don't run ads on our pages today, and nobody pays us to recommend a plan or product.
Contact us
Found a mistake, or have a question about a guide? Email us at [email protected]. We read every message. For help with your own Xfinity account, billing or service, contact Xfinity directly, as we can't access customer accounts.