Astro site speed
How fast Astro websites load on a phone, from Google PageSpeed tests of 74 Astro sites, and which popular ones are slowest. Use it to benchmark your own site, or to find Astro sites that need speed work.
Real users: 36% of the 59 Astro sites with Chrome UX Report data are rated fast overall (good loading, responsiveness and layout stability).
Slowest popular Astro sites
Lowest mobile PageSpeed scores among Astro 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 |
|---|---|---|---|---|
Bandainamcoent bandainamcoent.asia | – | 16 | 34.7s | 15.1 MB |
Neuberger nb.com | Financial services | 17 | 18.3s | 7.7 MB |
 Campaign Monitor campaignmonitor.com | Marketing | 27 | 17.9s | 4.0 MB |
 Daily Maverick dailymaverick.co.za | – | 29 | 10.5s | 3.9 MB |
AudioEye audioeye.com | – | 32 | 11.9s | 5.8 MB |
99 99app.com | Taxi service | 32 | 19.4s | 2.8 MB |
 Calendly calendly.com | – | 34 | 36.7s | 8.5 MB |
 Billie billie.io | – | 39 | 13.1s | 3.7 MB |
Illinois Bell att.com | Telecommunications | 40 | 6.1s | 5.6 MB |
Babymarkt babymarkt.com | – | 43 | 11.8s | 3.3 MB |
Buzzballz buzzballz.com | – | 43 | 8.0s | 3.1 MB |
Minneapolis Institute of Art artsmia.org | – | 44 | 17.6s | 2.5 MB |
 Crowdin crowdin.com | Software as a service | 45 | 21.0s | 3.8 MB |
 Buildkite buildkite.com | – | 47 | 19.4s | 3.3 MB |
Claris claris.com | Software | 47 | 14.3s | 11.5 MB |
AssemblyAI assemblyai.com | – | 48 | 27.9s | 9.2 MB |
 Atlan atlan.com | Data governance | 48 | 12.3s | 1.5 MB |
8x8 8x8.com | – | 54 | 16.0s | 2.8 MB |
Clubautomation clubautomation.com | – | 55 | 13.6s | 11.0 MB |
 HFSS ansys.com | – | 56 | 14.3s | 2.3 MB |
Camisadimona camisadimona.com.br | – | 57 | 6.3s | 2.6 MB |
 Astronomer astronomer.io | Artificial intelligence | 58 | 10.3s | 1.7 MB |
Perficient perficient.com | Business and other management consultancy activities | 59 | 5.4s | 4.5 MB |
 Tuta tutanota.com | – | 60 | 10.4s | 2.0 MB |
 Dover dover.com | – | 60 | 7.7s | 850 KB |
Every slow Astro site, as a list
All Astro 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 Astro sites load most
- Google Tag Manager62%
- Google/Doubleclick Ads47%
- Google Analytics43%
- Other Google APIs/SDKs31%
- Facebook22%
- Cloudflare16%
- Google Fonts14%
- LinkedIn Ads14%
- Bing Ads14%
- Optanon12%
Fastest popular Astro sites
- AfterShip aftership.com83
- AlixPartners alixpartners.com76
- Castingwords, LLC castingwords.com75
- Cdt cdt.cl73
- Association of Mature American Citizens amac.us72
- Cadence cadence.care71
- Altair Engineering altair.com70
- Close close.com70
- Ava Labs avalabs.org70
- Avalanche avalanche.com70
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 Astro. Updated October 2026.
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