Fastly Polyfill

Fastly Polyfill is a service that reads the User-Agent header of each request and returns polyfills appropriate for the requesting browser.

According to our data, Fastly Polyfill ranks 97th among the JavaScript libraries we track.
It has 0.4% of the JavaScript library market share and is detected on 0.3% of all websites.

💸 Pricing

Fastly Polyfill is available for free.

Free ✔️Open source

📊 Rankings and Market Share

🏆 Fastly Polyfill Awards

⚡ Sites Using Fastly Polyfill

We have data on 9,336 websites that use the Fastly Polyfill JavaScript library. Here is a list of some of the top ranked ones.

The highest rated site using Fastly Polyfill is mi.com.

#WebsiteRankCountryLanguage
1 mi.com #182 China American English
2 aftonbladet.se #514 Sweden Swedish
3 1mg.com #544 India English
4 nintendo.com #587 United States American English
5 iubenda.com #1,063 Italy American English
6 flaticon.com #1,470 Spain Spanish
7 laravel.com #2,213 English
8 wizzair.com #2,379 English
9 is.fi #2,421 Finland Finnish
10 jdsports.co.uk #2,626 United Kingdom English
11 hs.fi #2,937 Finland Finnish
12 parcelsapp.com #3,446 English
13 replit.com #3,607 United States English
14 cvent.com #3,889 United States English
15 teepublic.com #6,529 English
16 dailycaller.com #6,660 American English
17 deliveroo.co.uk #6,800 United Kingdom English
18 milwaukeetool.com #7,124 American English
19 zennioptical.com #7,314 English
20 jdsports.fr #7,509 France French

📈 Usage Statistics

Most of the sites that use Fastly Polyfill:

Most of the sites using Fastly Polyfill are from the United States, the United Kingdom, and Japan.

  • United States 22.7%
  • United Kingdom 8.3%
  • Japan 5.9%
  • Germany 5.7%
  • Australia 5.4%
  • Brazil 5.1%
  • Canada 4.6%
  • France 3.6%
  • India 3.4%
  • Other 35.3%

Most Fastly Polyfill users speak English, German, or Japanese.

  • English 68.9%
  • German 5.4%
  • Japanese 4%
  • Portuguese 4%
  • Spanish 3.7%
  • French 3.2%
  • Italian 1.9%
  • Dutch 1.8%
  • Swedish 0.8%
  • Other 6.3%

The Fastly Polyfill JavaScript library is especially popular on .com and .org top-level domains.

  • .com 55.4%
  • .org 6.7%
  • .co.uk 3%
  • .de 2.8%
  • .com.br 2.7%
  • .com.au 2.7%
  • .net 1.8%
  • .ca 1.5%
  • .ch 1.2%
  • Other 22.2%

The primary market segments for websites utilizing Fastly Polyfill include online shopping, business, and marketing and merchandising.

  • Online Shopping 18.7%
  • Business 13.4%
  • Marketing/Merchandising 13%
  • Fashion/Beauty 6.2%
  • General News 5.9%
  • Education/Reference 5%
  • Entertainment 4.9%
  • Health 3.8%
  • Blogs/Wiki 3.5%
  • Other 25.6%

🕵️ Similar Technologies

These are some of the best Fastly Polyfill alternatives.

RankName
4
Polyfill

An open-source JavaScript library that provides modern web API features to older browsers that do not natively support them.

FreeOpen source
22
Regenerator
Menlo Park, California, United States

A JavaScript library from Facebook that allows the use of ES6 generators in older browsers.

FreeOpen source
51
Core-js

A modular standard library for JavaScript that provides polyfills for ECMAScript up to 2024: promises, symbols, collections, iterators, typed arrays, and proposals.

FreeOpen source
117
Babel

A JavaScript compiler mainly used to convert ECMAScript 2015+ (ES6) code into an older JavaScript (ES5) version to maximize browser compatibility.

FreeOpen source
254
ES6 Shim

Provides compatibility shims so that legacy JavaScript engines behave as closely as possible to ECMAScript 6.

FreeOpen sourceLegacy

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💬 Frequently Asked Questions

Is Fastly Polyfill free?

Yes, it is a free JavaScript library.
It is also open source and its code can be found on GitHub.

Which country uses Fastly Polyfill the most?

The majority of Fastly Polyfill users are from the United States.

Who uses Fastly Polyfill?

According to our data, Fastly Polyfill is used on thousands of sites, including such established ones as mi.com, aftonbladet.se, and 1mg.com.

Is Fastly Polyfill used on government websites?

In total, we found Fastly Polyfill on 5 government sites in the United States.

Do academic institutions use Fastly Polyfill?

Yes. In total, we know of 15 academic websites in the United States that use Fastly Polyfill.

How does Fastly Polyfill stack up against its competitors?

Fastly Polyfill is a moderately popular JavaScript library, ranking ahead of 213 other JavaScript libraries we track.

What are the alternatives to Fastly Polyfill?

Alternatives and possible competitors to Fastly Polyfill may include Polyfill, Regenerator, and Babel.

👉 See Also

Statistics were last calculated on .
For details, see our methodology and disclaimer.