Koa
Koa is an expressive HTTP middleware framework for 
Node.js that uses ES2017 async functions.
Designed by the team behind 
Express, it offers a modular architecture, allowing developers to compose middleware functions for routing, error handling, and context management, providing fine-grained control over the request-response cycle.
According to our data, Koa ranks 49th among the backend frameworks we track.
It has 0.006% of the backend framework market share and is detected on 0.001% of all websites.
- 🏠 Website
- </> Source code
- 👨👩👦👦 Community
Stack Overflow💸 Pricing
Koa is available for free.
📊 Rankings and Market Share
- Backend Frameworks
- Rank: 49
- Market share: 0.006%
⚡ Sites Built With Koa
We have data on 39 websites that use the Koa backend framework. Here is a list of some of the top ranked ones.
The highest rated site using Koa is prisjakt.nu.
| # | Website | Rank | Country | Language |
|---|---|---|---|---|
| 1 | #22,537 | Sweden | Swedish | |
| 2 | #29,823 | Norway | Norwegian Bokmål | |
| 3 | #60,944 | United Kingdom | British English | |
| 4 | #71,812 | Sweden | French | |
| 5 | #87,251 | English | ||
| 6 | #164,853 | English | ||
| 7 | #180,227 | New Zealand | English | |
| 8 | #183,218 | Sweden | Finnish | |
| 9 | #200,622 | English | ||
| 10 | #225,288 | United States | English | |
| 11 | #260,460 | English | ||
| 12 | #290,694 | Denmark | Danish | |
| 13 | #371,122 | English | ||
| 14 | #397,305 | Sweden | Swedish | |
| 15 | #508,348 | English | ||
| 16 | #579,380 | United Kingdom | English | |
| 17 | #600,096 | English | ||
| 18 | #790,531 | United States | English | |
| 19 | #904,020 | Netherlands | Dutch | |
| 20 | #922,788 | United Kingdom | English |
📈 Usage Statistics
Most of the sites that use Koa:
- are located in the United States
- have content in English
- use the .com domain extension
- fall into the Marketing/Merchandising category.
Most of the sites using Koa are from the United States, Sweden, and the United Kingdom.
- United States 23.3%
- Sweden 16.7%
- United Kingdom 16.7%
- China 6.7%
- New Zealand 6.7%
- Czech Republic 3.3%
- Denmark 3.3%
- Finland 3.3%
- Germany 3.3%
- Other 16.7%
Most Koa users speak English or Swedish.
- English 64.9%
- Swedish 8.1%
- Russian 2.7%
- German 2.7%
- French 2.7%
- Dutch 2.7%
- Chinese 2.7%
- Danish 2.7%
- Finnish 2.7%
- Other 8.1%
The Koa backend framework is especially popular on .com, .org, and .co.uk top-level domains.
- .com 35.9%
- .org 10.3%
- .co.uk 10.3%
- .co.nz 5.1%
- .nu 5.1%
- .se 2.6%
- .cz 2.6%
- .dk 2.6%
- .kz 2.6%
- Other 22.9%
The primary market segments for websites utilizing Koa include marketing and merchandising, online shopping, and business.
- Marketing/Merchandising 29.4%
- Online Shopping 23.5%
- Business 17.6%
- Education/Reference 11.8%
- Health 11.8%
- Content Server 5.9%
🕵️ Similar Technologies
These are some of the best Koa alternatives.
🆚 Compare Alternatives
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💬 Frequently Asked Questions
Is Koa free?
Yes, it is a free backend framework.
It is also an open-source solution and its code can be found on 
GitHub.
Which country uses Koa the most?
The majority of Koa users are from the United States.
Who uses Koa?
According to our data, Koa is used on at least 39 sites, including such established ones as prisjakt.nu,
prisjakt.no, and
pricespy.co.uk.
How does Koa stack up against the competition?
Koa is a moderately popular backend framework, ranking ahead of 20 other backend frameworks we track.
🗃️ 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 4,001,723 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.