Flask vs Ruby on Rails
Head-to-head usage across the sites we track.
Top sites by authority
Flask · Ruby on Rails · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
3
89
Open Page Rank 8+
12
1,427
Open Page Rank 7+
33
4,476
Open Page Rank 6+
47
7,577
Open Page Rank 5+
66
11,599
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Flask · Ruby on Rails · share of sites in each country using one or the other
United States
279
77,772
United Kingdom
138
30,362
India
242
29,983
Canada
119
26,938
Germany
214
23,823
France
291
23,442
Japan
93
19,999
Spain
272
19,085
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Flask | Ruby on Rails |
|---|---|---|
| LCP | 1.8 s | 1.7 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 700 ms |
Median site's p75 values from the Chrome UX Report, Aug 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.
Flask to Ruby on Rails
| Domain | When |
|---|---|
| hotels-in-budva.com | Nov 2025 |