Fastly Polyfill on new websites
Free polyfill service mirror by Fastly, replacement for the compromised polyfill.io.
- Sites using Fastly Polyfill
- 1,392
- since Apr 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 19
no change on the 30 days before - Last 7 days
- 0.0%
- of new sites, 7-day average
no change on the week before
| In our data since | Apr 2026 |
|---|---|
| Last seen | Oct 19, 2026 |
| Website | polyfill-fastly.io |
What we found
- Fastly Polyfill appeared on about 290 new sites in the last 30 days.[1]
- Seven in ten new Fastly Polyfill sites also use jQuery.
Share of new sites using Fastly Polyfill
The line is the 7-day average share of new sites that use Fastly Polyfill, since 10 September.
Who uses Fastly Polyfill
| Type | Sites | Share | Bar |
|---|---|---|---|
| E-commerce | 82 | 54.0% | |
| Health | 27 | 17.8% | |
| Content | 8 | 5.3% | |
| Design | 7 | 4.6% | |
| Education | 6 | 4.0% | |
| Games | 6 | 4.0% | |
| Developer Tools | 5 | 3.3% | |
| Marketing | 4 | 2.6% | |
| Finance | 3 | 2.0% | |
| Productivity | 2 | 1.3% | |
| Social | 2 | 1.3% |
| Country | Sites | Share | Bar |
|---|---|---|---|
 US |
50 | 30.3% | |
 Brazil |
24 | 14.6% | |
 Canada |
17 | 10.3% | |
 Australia |
16 | 9.7% | |
 Pakistan |
12 | 7.3% | |
 UK |
10 | 6.1% | |
 India |
8 | 4.9% | |
 France |
7 | 4.2% | |
 Italy |
4 | 2.4% | |
 Japan |
3 | 1.8% | |
 Germany |
2 | 1.2% |
| Ending | Sites | Share | Bar |
|---|---|---|---|
| .com | 1,096 | 78.8% | |
| .store | 65 | 4.7% | |
| .site | 63 | 4.5% | |
| .net | 28 | 2.0% | |
| .online | 26 | 1.9% | |
| .org | 19 | 1.4% | |
| .ca | 18 | 1.3% | |
| .co | 11 | 0.8% | |
| .br | 10 | 0.7% | |
| .au | 8 | 0.6% | |
| .uk | 7 | 0.5% |
Javascript Library on new sites
| # | Movement | Tool | Share of category[3] | Bar | |
|---|---|---|---|---|---|
| 1 | – |
jQuery
|
34.5% | ||
| 2 | – |
React Router
|
16.2% | ||
| 3 | – |
Motion
|
14.6% | ||
| 4 | – |
TanStack Router
|
10.8% | ||
| 5 | – |
Swiper
|
8.3% | ||
| … | |||||
| 135 | ▲8 | Fastly Polyfill | 0.1% | ||
All-time shares across the new sites we track: of all of them, and of the sites using any Javascript Library tool. Among September launches it ranked #119 in Javascript Library, up from #127 in August. All 1551 in Javascript Library
Often used with Fastly Polyfill
Recently launched products built on Fastly Polyfill
7 of the 1,392 sites using Fastly Polyfill are product launches we list individually. The other 1,385 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.
South Korea
Russia
Watches, exports and the API give you all 1,392 sites using Fastly Polyfill, from £15 a month.
Notes
- These figures cover websites that went live since April 2026, not the web as a whole.
- Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
- Some products people expect to see here are filed under a related category: UI Library.
How this page is made
FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards Fastly Polyfill when we detect Fastly Polyfill on it at that look.
Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites