CDN and edge-services company. In Pawel Pokrywka's talk, Cloudflare is used as the reverse proxy in front of Planuj Wesele to implement Signed Exchanges via a ~$20/month subscription that includes the Automatic Signed Exchanges feature. Also provides early-hints link generation, Cloudflare Workers (used to strip Rails' Link header for SXG responses and rewrite CDN URLs to the main domain), and a Bot Fight Mode that blocks bot-like requests (must be disabled to debug SXG with curl). Returns different responses to Googlebot versus normal clients, which complicates black-box testing.