Discord, Postmates, and other popular apps and websites were down for some users on Friday due to a Cloudflare outage

• The gaming chat app Discord and food delivery platform Postmates appeared to be among the apps that experienced an outage Friday.
• The outage appears to have been caused by problems with Cloudflare, a cloud networking platform that supports many major websites and apps.
• Cloudflare CEO Matthew Prince posted a tweet detailing how the company traced the outage to a router in Atlanta.
• Cloudflare has since implemented a fix to the outage.

Twitter users began to notice some apps and websites, including those of food delivery service Postmates, were down Friday.

Discord, a group chat app, tweeted Friday that "users are currently having trouble disconnecting to Discord due to an upstream internet issue. We've got all engineers on deck investigating the issue."

The outage appears to have been caused by problems with Cloudflare, a cloud technology that supports many websites and apps. Cloudflare tweeted that it was investigating the issue shortly after the outage was reported by some users.

The company's CEO, Matthew Prince, later posted a tweet acknowledging the issue, tracing it back to a router in Atlanta.

"We isolated the Atlanta router and shut down our backbone, routing traffic across transit providers instead," Prince said on Twitter. "There was some congestion that caused slow performance on some links as the logging caught up. Everything is restored now and we're looking into the root cause."

The company implemented a fix Friday evening and said it is "monitoring the results."

A Facebook bug caused a similar outage last week, with Spotify and Tinder among the apps that crashed for many users. The issue was traced to a glitch with Facebook's software developer kit, or SDK, that is embedded in some of those apps. The problem was later resolved.