Fastly site speed
How fast Fastly websites load on a phone, from Google PageSpeed tests of 510 Fastly sites, and which popular ones are slowest. Use it to benchmark your own site, or to find Fastly sites that need speed work.
Real users: 23% of the 422 Fastly sites with Chrome UX Report data are rated fast overall (good loading, responsiveness and layout stability).
Slowest popular Fastly sites
Lowest mobile PageSpeed scores among Fastly sites in the Tranco top million. One lab test each, so a score can move from day to day.
| Site | Industry | Mobile score | LCP | Page weight |
|---|---|---|---|---|
Alaska Airlines alaskaair.com | – | 0 | 20.0s | 6.2 MB |
ATCO atco.com | Electricity generation | 3 | 38.2s | 10.4 MB |
 All-Clad all-clad.com | – | 4 | 56.0s | 20.5 MB |
 Ascension ascension.org | Health care | 8 | 37.4s | 19.1 MB |
Celebrity Cruises celebritycruises.com | – | 9 | 22.2s | 12.6 MB |
 Angus & Coote anguscoote.com.au | Retail | 9 | 20.9s | 3.4 MB |
 Cuwest cuwest.org | – | 14 | 52.9s | 10.9 MB |
 Temple University temple.edu | – | 15 | 29.9s | 36.5 MB |
University of Louisville louisville.edu | – | 16 | 10.6s | 3.1 MB |
Bambora bambora.com | – | 16 | 20.6s | 9.6 MB |
 A.M. Leonard, Inc. amleo.com | – | 17 | 20.4s | 7.1 MB |
 GFS Chemicals gfschemicals.com | – | 18 | 33.6s | 4.9 MB |
 AtlantiCare Regional Medical Center City Division atlanticare.org | – | 19 | 23.8s | 8.1 MB |
 Covoya Specialty Coffee covoyacoffee.com | – | 19 | 45.9s | 17.1 MB |
 Bottlestore bottlestore.com | – | 19 | 25.4s | 4.7 MB |
 Allopneus allopneus.com | Q112165635 | 20 | 5.4s | 2.6 MB |
 Access Hardware accesshardware.com.au | – | 21 | 29.9s | 6.8 MB |
 Catch Restaurants catchrestaurants.com | – | 23 | 39.3s | 16.5 MB |
 2nd Swing 2ndswing.com | – | 24 | 42.8s | 25.9 MB |
 American Medical Association ama-assn.org | – | 25 | 19.6s | 7.3 MB |
Avient Colorants Singapore Pte. Ltd. (Singapore) avient.com | – | 25 | 36.1s | 20.6 MB |
.png){kind=small} Atkins Farm, Garden Machinery and Parts atkins.ie | – | 25 | 14.1s | 5.4 MB |
Addax addax.com.tr | – | 25 | 29.6s | 5.3 MB |
 Apollo Global Management apollo.com | Asset management | 26 | 42.3s | 19.0 MB |
 A-Max Auto Insurance amaxinsurance.com | – | 26 | 27.1s | 4.5 MB |
Every slow Fastly site, as a list
All Fastly sites scoring under 50 on mobile, filtered by industry, country or popularity, with what slows each one down, company details and contacts. Credits included to start.
Third parties Fastly sites load most
- Google Tag Manager72%
- Google Analytics55%
- Google/Doubleclick Ads51%
- Other Google APIs/SDKs46%
- Google Fonts44%
- Facebook28%
- Google CDN22%
- Sentry18%
- Bing Ads18%
- Optanon17%
Fastest popular Fastly sites
- Blauer blauer.com100
- Agryco agryco.com100
- Block.One b1.com100
- PicPay picpay.com97
- Carl Bechem Gmbh bechem.com89
- Brico Dépôt bricodepot.fr88
- AnMed anmed.org86
- 3D Systems (United Kingdom) 3dsystems.com85
- Neighbourly neighbourly.co.nz84
- CEB ceb.com82
How this is measured
Each site's home page is tested with Google PageSpeed Insights (Lighthouse, simulated mid-range phone on a slow 4G connection) when it's enriched; real-user ratings come from the Chrome UX Report where Google has enough visits. Only sites in the Tranco top million are named. See also websites using Fastly. Updated October 2026.
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