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 61 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 54.2%
- Japan 27.1%
- Germany 13.6%
- Australia 1.7%
- Netherlands 1.7%
- Spain 1.7%
Most H2O users speak English, Japanese, or German.
- English 58.9%
- Japanese 25%
- German 8.9%
- Spanish 1.8%
- Dutch 1.8%
- Arabic 1.8%
- Basque 1.8%
The H2O web server is especially popular on .co.nz, .com, and .de top-level domains.
- .co.nz 49.2%
- .com 14.8%
- .de 6.6%
- .net 4.9%
- .org 4.9%
- .jp 4.9%
- .info 3.3%
- .es 1.6%
- .io 1.6%
- Other 8.2%
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 64.3% of sites where versions were detected.
- 2.2 64.3%
- 2.3 35.7%
🕵️ Similar Technologies
These are some of the best H2O alternatives.
OpenResty🆚 Compare Alternatives
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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 open source, 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 61 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.