The tricky science of Internet measurement
2025-10-27
The Internet is one big open system composed of many closed boxes — which makes measuring the Internet difficult. In this post we explore Internet measurement as a science....
From .com to .anything: introducing Top-Level Domain (TLD) insights on Cloudflare Radar
2025-10-27
Cloudflare Radar has launched a new Top-Level Domain (TLD) page, providing insights into TLD popularity, traffic, and security. The top-ranking TLD may come as a surprise....
Data at Cloudflare scale: some insights on measurement for 1,111 interns
2025-10-27
While large cloud providers hold vast troves of passive network data, analyzing them is complicated. The scale, noise, and absence of definitive ground truth all create major hurdles. Yet by carefully quantifying these constraints and finding alternative forms of evidence, meaningful insights can still emerge....
Making the Internet observable: the evolution of Cloudflare Radar
2025-10-27
Cloudflare Radar has evolved significantly since its 2020 launch, offering deeper insights into Internet security, routing, and traffic with new tools and data that help anyone understand what's happening online....
Internet measurement, resilience, and transparency: blog takeover from Cloudflare Research and friends
2025-10-27
Coinciding with the ACM’s Internet Measurement Conference, the Cloudflare Research team is publishing a series of posts this week to share their research on building a more measurable, resilient, and transparent Internet. These posts will cover foundational concepts in Internet measurement, Internet resilience, cryptography, and networking. ...
How does Cloudflare’s Speed Test really work?
2025-10-27
In this blog post we’ll discuss how Cloudflare thinks about measuring Internet quality, how our own Cloudflare speed test works, and our future plans for providing Internet measurement tools that help everyone build a better Internet....
How Cloudflare’s client-side security made the npm supply chain attack a non-event
2025-10-24
A recent npm supply chain attack compromised 18 popular packages. This post explains how Cloudflare’s graph-based machine learning model, which analyzes 3.5 billion scripts daily, was built to detect and block exactly this kind of threat automatically....
Securing agentic commerce: helping AI Agents transact with Visa and Mastercard
2025-10-24
Cloudflare is partnering with Visa and Mastercard to help secure the future of agentic commerce....
A deep dive into BPF LPM trie performance and optimization
2025-10-21
This post explores the performance of BPF LPM tries, a critical data structure used for IP matching. ...
Load Balancing Monitor Groups: Multi-Service Health Checks for Resilient Applications
2025-10-17
Cloudflare Load Balancing now supports Monitor Groups, allowing you to combine multiple health monitors into a single, logical assessment. ...
Improving the trustworthiness of Javascript on the Web
2025-10-16
There's no way to audit a site’s client-side code as it changes, making it hard to trust sites that use cryptography. We preview a specification we co-authored that adds auditability to the web....
Unpacking Cloudflare Workers CPU Performance Benchmarks
2025-10-14
Cloudflare investigated CPU performance benchmark results for Workers, uncovering and fixing issues in infrastructure, V8 garbage collection, and OpenNext optimizations. ...
Introducing REACT: Why We Built an Elite Incident Response Team
2025-10-09
We're launching Cloudforce One REACT, a team of expert security responders designed to eliminate the gap between perimeter defense and internal incident response....
How we found a bug in Go's arm64 compiler
2025-10-08
84 million requests a second means even rare bugs appear often. We'll reveal how we discovered a race condition in the Go arm64 compiler and got it fixed....
Payload on Workers: a full-fledged CMS, running entirely on Cloudflare’s stack
2025-09-30
We demonstrate how the open-source Payload CMS was ported to run entirely on Cloudflare's developer platform....
Nationwide Internet shutdown in Afghanistan extends localized disruptions
2025-09-30
On September 29, 2025, Internet connectivity was completely shut down across Afghanistan, impacting business, education, finance, and government services....
15 years of helping build a better Internet: a look back at Birthday Week 2025
2025-09-29
Birthday WeekPartnersDeveloper PlatformWorkers LaunchpadPerformanceSecurityCacheSpeedDevelopersAI1.1.1.1Application SecurityApplication ServicesBotsCDNCloudflare for StartupsCloudflare OneCloudflare Zero TrustCloudflare Workers
Rust-powered core systems, post-quantum upgrades, developer access for students, PlanetScale integration, open-source partnerships, and our biggest internship program ever — 1,111 interns in 2026....
Cloudflare just got faster and more secure, powered by Rust
2025-09-26
We’ve replaced the original core system in Cloudflare with a new modular Rust-based proxy, replacing NGINX. ...
Introducing Observatory and Smart Shield — see how the world sees your website, and make it faster in one click
2025-09-26
We're announcing two enhancements to our Application Performance suite that'll show how the world sees your website, and make it faster with one click - available Cloudflare Dashboard!...
Monitoring AS-SETs and why they matter
2025-09-26
We will cover some of the reasons why operators need to monitor the AS-SET memberships for their ASN, and now Cloudflare Radar can help. ...
