I attended a presentation by Cloudflare last week about how they helped X (formerly Twitter) improve their reliability and network performance.

To my knowledge, you will not find this information anywhere else online.

It was presented by Alex Krivit (PM), David Huber (Director, Product Management), and Sachin Fernandes (Engineering Manager) at the Cloudflare Connect 2025 partner and customer summit.

Here are my detailed notes from the session for anyone who might find it helpful.

X deployed several Cloudflare products as part of their infrastructure modernization:

* CDN and content delivery as the primary focus

* Argo for dynamic performance optimization and congestion solutions (with custom tuning)

* PNI and CNI (Private Network Interconnect and Cloudflare Network Interconnect) for direct connectivity

* Extensive peering work to improve global connectivity

* Security tools though these were mentioned as being outside the scope of this particular presentation and possibly under NDA

The engagement discussed in the presentation focused heavily on both network-level products and CDN delivery optimization.