H2O
H2O is an optimized, open-source HTTP server that supports HTTP/1.x, HTTP/2, and HTTP/3.
According to our data, H2O ranks 30th among the web servers we track.
It has 0.003% of the web server market share and is detected on 0.002% of all websites.
- 🏠 Website
- </> Source code
💸 Pricing
H2O is available for free.
📊 Rankings and Market Share
- Web Servers
- Rank: 30
- Market share: 0.003%
🏆 H2O Awards
- ⭐ 10th most popular in New Zealand in the Web Servers category.
⚡ Sites Using H2O
We have data on 63 websites that use the H2O web server. Here is a list of some of the top ranked ones.
The highest rated site using H2O is mourjan.com.
| # | Website | Rank | Country | Language |
|---|---|---|---|---|
| 1 | #36,873 | Germany | Arabic | |
| 2 | #175,136 | Japan | Japanese | |
| 3 | #421,118 | Germany | English | |
| 4 | #459,889 | Japan | Japanese | |
| 5 | #592,209 | Germany | German | |
| 6 | #732,104 | Japan | English | |
| 7 | #811,011 | Japan | Japanese | |
| 8 | #818,111 | Japan | Japanese | |
| 9 | #906,264 | Japan | Japanese | |
| 10 | #1,217,656 | New Zealand | English | |
| 11 | #1,385,460 | Germany | German | |
| 12 | #1,505,103 | Japan | Japanese | |
| 13 | #1,880,362 | Japan | Japanese | |
| 14 | #3,409,095 | Germany | German | |
| 15 | #3,555,850 | New Zealand | English | |
| 16 | #3,641,912 | New Zealand | English | |
| 17 | #3,682,048 | New Zealand | English | |
| 18 | #3,866,022 | Japan | Japanese | |
| 19 | #4,166,088 | New Zealand | English | |
| 20 | Germany | German |
📈 Usage Statistics
Most of the sites that use H2O:
- are located in New Zealand
- have content in English
- use the .co.nz domain extension
- fall into the Job Search category.
Most of the sites using H2O are from New Zealand, Japan, and Germany.
- New Zealand 55.7%
- Japan 26.2%
- Germany 13.1%
- Australia 1.6%
- Netherlands 1.6%
- Spain 1.6%
- Other 0.2%
Most H2O users speak English, Japanese, or German.
- English 60.3%
- Japanese 24.1%
- German 8.6%
- Spanish 1.7%
- Dutch 1.7%
- Arabic 1.7%
- Basque 1.7%
- Other 0.2%
The H2O web server is especially popular on .co.nz, .com, and .de top-level domains.
- .co.nz 50.8%
- .com 14.3%
- .de 6.3%
- .net 4.8%
- .org 4.8%
- .jp 4.8%
- .info 3.2%
- .es 1.6%
- .io 1.6%
- Other 7.8%
The primary market segments for websites utilizing H2O include job search, blogs and wiki, and media sharing.
- Job Search 16.7%
- Blogs/Wiki 16.7%
- Media Sharing 16.7%
- Business 8.3%
- Marketing/Merchandising 8.3%
- Entertainment 8.3%
- Search Engines 8.3%
- Technical/Business Forums 8.3%
- Technical Information 8.3%
- Other 0.1%
🔢 H2O Versions
The most widespread version of H2O is 2.2, used by 62.1% of sites where versions were detected.
- 2.2 62.1%
- 2.3 37.9%
🕵️ Similar Technologies
These are some of the best H2O alternatives.
OpenResty🆚 Compare Alternatives
Compare H2O to…
- 🕵️ Similar servers
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Caddy💬 Frequently Asked Questions
Where is H2O's headquarters?
H2O is located in Tokyo, Japan.
Is H2O free?
Yes, it is a free web server.
It is also an open-source solution, and its code is available on 
GitHub.
Which country uses H2O the most?
The majority of H2O users are from New Zealand.
Who uses H2O?
According to our data, H2O is used on at least 63 sites, including such established ones as mourjan.com,
hari-study.com, and
rgbstock.com.
Do academic institutions use H2O?
Yes. The most notable of these is suma.ac.jp.
What are the alternatives to H2O?
Alternatives and possible competitors to H2O may include 
Nginx, 
Apache, and 
LiteSpeed Web Server.
🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,375,483 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.