Broadband Mapping and Data

Comcast Leads in Download Speed: Opensignal

Opensignal’s Q1 report on major ISPs found AT&T had the best upload speeds, and Charter had the highest network reliability score.

Jake Neenan

May 28, 2026 — 2 min read

Photo by Vitaly Gariev via Unsplash

WASHINGTON, May 28, 2026 – Comcast led in three categories in a new Opensignal study on fixed broadband service: consistent quality, download speed, and video experience. AT&T had the best upload speeds, and Charter had the highest reliability score.

Opensignal says its speed scores represent “the typical everyday speeds a user experiences across a provider’s network,” based on daily measurements from connected devices. The research group’s consistent quality metric measures how often a network “meets the requirements for common applications” and incorporates speed, latency, and other measurements, and reliability measures “the ability of a household to connect to the internet and to successfully complete 'uninterrupted' tasks across multiple devices,” according to the report.

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