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Sites built with Fastly Polyfill

Free polyfill service mirror by Fastly, replacement for the compromised polyfill.io.

#141 of 1101 in Javascript Library Tracked since Apr 2026 Last seen: Sep 4, 2026
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561 sites

555 found by StackScope, 6 via launch platforms

StackScope Wider Web 551 StackScope Discovery (Indie) 4 Product Hunt 3 PeerPush 2 Hacker News 1
  • StackScope Wider Web 551
  • StackScope Discovery (Indie) 4
  • Product Hunt 3
  • PeerPush 2
  • Hacker News 1
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 0.0% -0.0pp
Most used with Cloudflare, Google Fonts, Google Analytics
Top product types E-commerce, Health, Content

Fastly Polyfill has been detected on 561 launches we've crawled, with 124 of those in September 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: Kids Court | Justice is coming!, today.

It's most commonly paired with Cloudflare, Google Fonts, and Google Analytics. By product type, the launches using it are most often E-commerce (24%), Health (24%), and Content (14%). By domain ending, launches using it are 2.1 times as likely as the average launch to live on a .com domain.

What kind of products ship with Fastly Polyfill

37 launches

E-commerce
24.32%
Health
24.32%
Content
13.51%
Design
10.81%
Education
5.41%
Marketing
5.41%
Productivity
5.41%
Developer Tools
2.70%
Finance
2.70%
Games
2.70%
Social
2.70%

Domain endings using Fastly Polyfill

558 sites

  • .com 90.50%
  • .net 3.58%
  • .org 1.08%
  • .app 0.36%
  • .br 0.36%
  • .ca 0.36%
  • .dev 0.36%
  • .fr 0.36%
  • .nl 0.36%
  • .online 0.36%
  • .uk 0.36%

Share of new sites using Fastly Polyfill

Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026.

0.0%
last 7 days
-0.0pp vs prior week
0.0%
September so far
124 of 279,047 sites
561
sites all time
since Apr 2026
Fastly Polyfill daily detection trend Before 8 July 2026: launch platforms only. We began crawling the wider web on this date, so the cohort this share is measured against changes here. 5% 2% 0% Apr May Jun Jul Aug Sep Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery. Weekly averages before this point, daily after. Jun 6 · 0 / 436 = 0.0% Jun 7 · 0 / 404 = 0.0% Jun 8 · 0 / 515 = 0.0% Jun 9 · 0 / 876 = 0.0% Jun 10 · 0 / 722 = 0.0% Jun 11 · 0 / 577 = 0.0% Jun 12 · 0 / 449 = 0.0% Jun 13 · 0 / 380 = 0.0% Jun 14 · 0 / 345 = 0.0% Jun 15 · 0 / 532 = 0.0% Jun 16 · 0 / 1052 = 0.0% Jun 17 · 0 / 907 = 0.0% Jun 18 · 0 / 674 = 0.0% Jun 19 · 0 / 547 = 0.0% Jun 20 · 0 / 443 = 0.0% Jun 21 · 0 / 383 = 0.0% Jun 22 · 0 / 576 = 0.0% Jun 23 · 0 / 900 = 0.0% Jun 24 · 0 / 737 = 0.0% Jun 25 · 0 / 618 = 0.0% Jun 26 · 0 / 534 = 0.0% Jun 27 · 0 / 431 = 0.0% Jun 28 · 0 / 383 = 0.0% Jun 29 · 0 / 503 = 0.0% Jun 30 · 0 / 801 = 0.0% Jul 1 · 0 / 795 = 0.0% Jul 2 · 0 / 604 = 0.0% Jul 3 · 0 / 499 = 0.0% Jul 4 · 0 / 411 = 0.0% Jul 5 · 0 / 367 = 0.0% Jul 6 · 0 / 551 = 0.0% Jul 7 · 0 / 1172 = 0.0% Jul 8 · 1 / 12591 = 0.0% Jul 9 · 0 / 23752 = 0.0% Jul 10 · 0 / 22553 = 0.0% Jul 11 · 0 / 15988 = 0.0% Jul 12 · 0 / 20295 = 0.0% Jul 13 · 0 / 20929 = 0.0% Jul 14 · 0 / 20418 = 0.0% Jul 15 · 1 / 17249 = 0.0% Jul 16 · 0 / 14270 = 0.0% Jul 17 · 0 / 19731 = 0.0% Jul 18 · 0 / 22709 = 0.0% Jul 19 · 0 / 26089 = 0.0% Jul 20 · 0 / 22592 = 0.0% Jul 21 · 0 / 21662 = 0.0% Jul 22 · 0 / 23209 = 0.0% Jul 23 · 1 / 16877 = 0.0% Jul 24 · 0 / 12860 = 0.0% Jul 25 · 0 / 8951 = 0.0% Jul 26 · 1 / 19988 = 0.0% Jul 27 · 1 / 33890 = 0.0% Jul 28 · 4 / 38232 = 0.0% Jul 29 · 10 / 50128 = 0.0% Jul 30 · 8 / 43972 = 0.0% Jul 31 · 8 / 51147 = 0.0% Aug 1 · 8 / 50536 = 0.0% Aug 2 · 12 / 49757 = 0.0% Aug 3 · 10 / 48272 = 0.0% Aug 4 · 4 / 37378 = 0.0% Aug 5 · 1 / 32721 = 0.0% Aug 6 · 5 / 36609 = 0.0% Aug 7 · 1 / 37907 = 0.0% Aug 8 · 6 / 39701 = 0.0% Aug 9 · 2 / 34236 = 0.0% Aug 10 · 2 / 28890 = 0.0% Aug 11 · 6 / 32048 = 0.0% Aug 12 · 2 / 33516 = 0.0% Aug 13 · 16 / 49985 = 0.0% Aug 14 · 12 / 51461 = 0.0% Aug 15 · 10 / 51545 = 0.0% Aug 16 · 8 / 51879 = 0.0% Aug 17 · 15 / 41478 = 0.0% Aug 18 · 10 / 53975 = 0.0% Aug 19 · 12 / 49562 = 0.0% Aug 20 · 11 / 66981 = 0.0% Aug 21 · 27 / 90497 = 0.0% Aug 22 · 30 / 91578 = 0.0% Aug 23 · 42 / 90314 = 0.0% Aug 24 · 28 / 78992 = 0.0% Aug 25 · 21 / 69444 = 0.0% Aug 26 · 14 / 65229 = 0.0% Aug 27 · 11 / 83578 = 0.0% Aug 28 · 16 / 83454 = 0.0% Aug 29 · 17 / 84380 = 0.0% Aug 30 · 19 / 92688 = 0.0% Aug 31 · 12 / 90264 = 0.0% Sep 1 · 66 / 91323 = 0.1% Sep 2 · 32 / 96774 = 0.0% Sep 3 · 26 / 90950 = 0.0%
Mar 30, 2026 90 days Sep 3, 2026

The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.

How StackScope detects technologies

⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.

Javascript Library leaders

Tool % of launches % of category
#1 – jQuery 14.36% 34.59%
#2 – React Router 6.78% 16.32%
#3 – Motion 6.67% 16.07%
#4 – TanStack Router 4.25% 10.24%
#5 – Swiper 3.63% 8.75%
…
#141 ▲80 Fastly Polyfill Current page 0.02% 0.05%

Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Fastly Polyfill is typically used alongside jQuery rather than instead of it.Among August launches it ranked #141 in Javascript Library, up from #221 in July. All 1101 in Javascript Library →

Often used with

Tool Sites
Cloudflare 476
Google Fonts 442
Google Analytics 438
Google Tag Manager 438
jQuery 434

Tools most often detected on the same sites as Fastly Polyfill.

Recent launches we can show

10 of the 561 sites using Fastly Polyfill are product launches we list individually. The other 551 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works

Kids Court | Justice is coming! Aug 28, 2026 8Doors - Metroidvania style 2D Action Platformer Aug 28, 2026 Games Screenshot of Creatio 10X "Unlimited" Release, a launch using Fastly Polyfill Creatio 10X "Unlimited" Release Aug 24, 2026 · score 8.1 Marketing Screenshot of ExactVerify, a launch using Fastly Polyfill ExactVerify Aug 24, 2026 · score 8.1 Senf لاله Aug 21, 2026 Education FinGraph AI — Institutional Equity Research Platform Aug 13, 2026 Finance Screenshot of Universal-3.5 Pro, a launch using Fastly Polyfill Universal-3.5 Pro Jul 8, 2026 · score 9.5 United States Developer Tools Screenshot of JEE-Verse, a launch using Fastly Polyfill JEE-Verse May 4, 2026 · score 1.7 Screenshot of BeautyPlus - AI Photo & Video Editor, a launch using Fastly Polyfill BeautyPlus - AI Photo & Video Editor May 2, 2026 · score 6.6 Design Screenshot of Aprilfeels, a launch using Fastly Polyfill Aprilfeels Apr 1, 2026 · score 9.2 Health

The StackScope API serves all 561 sites using Fastly Polyfill, filterable and exportable, from £15 a month.

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.