Fly.io vs Vercel
Head-to-head usage across the sites we track.
Top sites by authority
Fly.io · Vercel · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
2
31
Open Page Rank 8+
16
474
Open Page Rank 7+
59
1,887
Open Page Rank 6+
119
3,697
Open Page Rank 5+
186
6,428
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Fly.io · Vercel · share of sites in each country using one or the other
United States
2,117
60,657
India
954
43,180
Brazil
518
26,153
United Kingdom
775
22,220
Germany
583
18,480
Canada
691
17,811
France
535
17,732
Indonesia
427
15,061
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Fly.io | Vercel |
|---|---|---|
| LCP | 2 s | 2.1 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 500 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Fly.io to Vercel
| Domain | When |
|---|---|
| castmagic.io | May 2026 |
| hopecityflorida.com | Mar 2026 |
| postman.com | Feb 2026 |
| gracepointkitsap.com | Feb 2026 |
Vercel to Fly.io
| Domain | When |
|---|---|
| notellm.app | Jun 2026 |
| calculord.com | Mar 2026 |
| nimble.nexus | Feb 2026 |