H2O is a fast and secure HTTP/2 server written in C by Kazuho Oku.
Websites using H2O
These are the top websites usings H2O based on traffic.
Get the full list of websites and companies using H2O.
Create relevant reports for H2O to find sales leads or learn more about your target audience.
H2O usage trend
This graph shows the growth of H2O since November 2022.
A breakdown of countries and languages used by H2O websites.
Alternatives to H2O
These are the most popular H2O alternatives in 2022.
See the full list of H2O alternatives.
Wappalyzer works with the tools you use every day.
Wappalyzer is trusted by thousands of professionals world-wide
Wappalyzer has proven to be a great tool to help us break down the aggregate analysis of how the web is doing by various technologies.Ilya Grigorik
Principal Engineer at Shopify
These days you need advanced marketing tools to stand out from the competition. Wappalyzer help us do just that.Thomas Alibert
Growth Engineer at PayFit
I use Wappalyzer all the time and it's been invaluable in being relevant in my outreach.Michael Petselas
Customer Growth Specialist at HubSpot
Wappalyzer is an integral part of our sales process, enabling us to optimise lead segmentation at scale. It’s a total game changer for our organisation.Roman Schweiger
Head of Business Development at Boomerank
Wappalyzer has been such a useful part of the HTTP Archive dataset. It's enabled us to slice the data in new ways and discover more interesting insights about the state of the web.Rick Viscomi
Senior DevRel Engineer at Google
Wappalyzer is helping our sales teams to understand prospects better and faster by having a clear view on their tech stack.Rabin Nuchtabek
Chief Growth Engineer at Skedify
Subscribe to receive occasional product updates.