Social media platform X was down for thousands of users in the US, according to Downdetector.
More than 5,600 people reported issues with the social media platform on Tuesday morning.
Cloudflare, a web infrastructure company, also had problems impacting other services.
It is unclear whether the outages were related.
“We are working to understand the full impact and mitigate this problem. More updates to follow shortly,” Cloudfare said on its status page.
OpenAI, Facebook, AWS (Amazon Web Services), bet365, Canva, Spotify, BrightHR and League of Legends also suffered outages, according to Downdetector.com.
Graeme Stuart, head of the public sector at Check Point, a cybersecurity firm credited with creating the first firewall, said: “Cloudflare going down today sits in the same pattern we saw with the recent AWS and Azure outages. These platforms are vast, efficient and used by almost every part of modern life.
“The upside is obvious. Their scale keeps costs low, makes security tools more accessible and gives even small organisations the kind of performance that would once have been impossible.
“The downside is just as clear. When a platform of this size slips, the impact spreads far and fast and everyone feels it at once.”
Mr Stuart said that the reported outages didn’t happen because each organisation failed on its own, but because “a single layer they all rely on stopped responding”.
“People saw a simple error page, but the break reached into the systems that hold up essential services,” he added.
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