H2O is a backend technology. H2O is a fast and secure HTTP/2 server written in C by Kazuho Oku.. Currently detected on 1 websites in the Glympt index.
Official website: github.com.
By scanning headers, HTML, JS globals, meta tags, and cookies. Detection is automated and non-intrusive.
Confidence averages 100% for H2O. ≥70% is highly reliable.
Yes. Pro and Business plans include CSV export with full filtering.
Major sites: ~7 days. Smaller domains: ~30 days. Trigger fresh scans from the dashboard.
H2O gained 1 domains in 30 days.
0–100 score indicating detection certainty. Multiple strong signals = high confidence.