Platform

Products

DeliverReal-time experiences at global scale
SecureProtect apps and APIs from AI-scale threats
DeployRun code milliseconds from your users
ObserveReal-time visibility, from origin to edge

Services

Professional ServicesExpert help to migrate or optimize your delivery service
Managed CDNFastly's managed cloud CDN deployed inside your own network
Managed Security24/7 expert-managed WAF, bot, and DDoS threat protection
Live EntertainmentReal-time monitoring & support for high-traffic events

Deliver fast, personalized experiences globally with Fastly CDN

Get everything you need from a modern CDN — from effortless scale and built-in security to programmable control and full visibility.

Solutions

Industries

Use Cases

High-performance streaming media

Fastly powers the world's leading media brands with an open edge cloud platform built to deliver flawless live and on-demand entertainment at any scale, to any screen, anywhere.

Resources

Learn

Insights

Support

Developers

Fastly vs. Cloudflare

See why enterprises are switching from Cloudflare to Fastly with 24% faster load times, 33% better TTFB, and stronger app security.

Company

News & Events

A new architecture for the modern internet

Explore Fastly's global network — 622 Tbps of capacity, fewer, more powerful POPs, and sub-millisecond TTFB at the 99th percentile.

Pricing

Try Fastly free Talk to an expert

Back to blog

Follow and Subscribe

Kazuho Oku

Principal OSS Engineer

Kazuho Oku is a Principal OSS Engineer at Fastly. He is the author of the H2O HTTP/2 and HTTP/3 server; quicly, the QUIC implementation for H2O; and picoTLS, the TLS library used by H2O. He has been building high-performance software since 1997.

Fastly's Resilience to HTTP/1.1 Desynchronization AttacksFrederik Deweerdt, Kazuho Oku, +2

Discover why Fastly's architecture protects against HTTP/1.1 desynchronization attacks, unlike other CDNs. Protect your applications with Fastly's secure platform.

August 07, 2025

SecurityCDN & Delivery+3

QUIC matches TCP's efficiency, says our research. | FastlyKazuho Oku, Jana Iyengar

Compare QUIC vs TCP to better understand the computational efficiency of both.

April 30, 2020

Industry insightsPerformance+2