Websites Using H2O

H2O is a fast and secure HTTP/2 server written in C by Kazuho Oku.

Categories: Web server

Official website: https://github.com/h2o/h2o

H2O is ranked #35 of 94 in Web server by website adoption.

Web server alternatives ranked by popularity

1. Nginx — 73,608 websites
2. Apache HTTP Server — 43,253 websites
3. Apache — 42,120 websites
4. LiteSpeed — 12,083 websites
5. IIS — 7,633 websites
6. OpenResty — 4,354 websites
7. Caddy — 787 websites
8. Tengine — 694 websites
9. Google Web Server — 646 websites
10. Kestrel — 518 websites

How WhatStack detects H2O

WhatStack detects H2O by analyzing HTTP headers, HTML source code, JavaScript globals, meta tags, cookies, DNS records, and ads.txt entries using signature-based pattern matching across 10 different analyzers.

Frequently Asked Questions

What is H2O?

H2O is a fast and secure HTTP/2 server written in C by Kazuho Oku.

How many websites use H2O?

WhatStack has detected H2O on 0 websites in our database.

How do you detect H2O?

We analyze HTTP headers, HTML source, JavaScript globals, meta tags, cookies, DNS records, and ads.txt entries to identify H2O with high accuracy using signature-based pattern matching.