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Websites using Polyfill

2,856 websites detected · Updated Oct 31, 2026

What is Polyfill?

Polyfill is a technology in the Website Optimization category. 2,856 websites use Polyfill, detected by Hunter on Oct 31, 2026.

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The websites using Polyfill

A sample of the websites Hunter detects Polyfill on, ordered by web popularity.

Domain name Industry
1
theguardian.com
Book and Periodical Publishing 982 email addresses
2
iotechnologies.com
- 7 email addresses
3
virb.com
Technology, Information and Internet 4 email addresses
4
fosters.com
Newspaper Publishing 65 email addresses
5
jsonline.com
Book and Periodical Publishing 302 email addresses
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You have 2,856 sites. Now reach the people.

Hunter already holds email addresses at all 50 websites listed above.

  • Emilie H. · Senior Vice President The Guardian

    85%

  • Kimberley H. · Director Foster's Daily Democrat

    83%

  • David W. · Marketing Director Milwaukee Journal Sentinel

    70%

Real people at the websites listed above. Only the part before the @ is hidden here — the company domain is the real one.

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Who uses Polyfill

Websites running Polyfill, counted by industry and by country. Only the largest groups are shown.

By industry

Industry Websites
Professional Services 252
Technology, Information and Media 190
Manufacturing 129
Entertainment Providers 101
Consumer Services 99
Accommodation Services 77
Hospitals and Health Care 75
Financial Services 62
Education 54
Retail 51
Real Estate and Equipment Rental Services 46
Government Administration 42

By country

Country Websites
United States 640
United Kingdom 189
France 127
Germany 96
Canada 80
Netherlands 77
Australia 48
Japan 47
Poland 45
Russia 43
Spain 35
Belgium 34

Polyfill by country

The countries where we detected enough Polyfill websites to rank them.

Polyfill FAQs

Browse every technology

Hunter detects Polyfill on 2,856 websites. The figure comes from Hunter's own crawl of company websites and is rebuilt every night, so it moves as sites adopt and drop the technology.

The table on this page is a sample of the websites running Polyfill, ordered by web popularity, with the industries they are in and how many email addresses Hunter holds for each. Create a free account to search any of them and see the addresses.

The websites Hunter detects Polyfill on most often also run jQuery, PHP and Google Analytics.

Polyfill is one of the Website Optimization technologies Hunter tracks. Others it detects widely include Yoast SEO, Litespeed Cache and OWL Carousel.

Yes — that is what Hunter is for. The last column of the table shows how many email addresses Hunter already holds for a website, where it has found any. Sign up to see the addresses themselves, with the name and job title of the person behind each one.
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