the optimized HTTP/1.x, HTTP/2, HTTP/3 server

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H2O is a new generation HTTP server that provides quicker response to users with less CPU, memory bandwidth utilization when compared to older generation of web servers. Designed from ground-up, the server implements of HTTP/2 and HTTP/3 taking the advantages of features including new and old content prioritization schemes, server push, 103 Early Hints, promising outstanding experience to the visitors of the web site.

Explanation of the benchmark charts can be found in the benchmarks page.

Key Features


List of all the vulnerabilities having been fixed can be found here.