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
88
Open Page Rank 8+
13
1,419
Open Page Rank 7+
39
4,424
Open Page Rank 6+
52
7,483
Open Page Rank 5+
69
11,443
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
275
78,208
United Kingdom
137
31,164
India
251
29,980
Canada
116
27,669
France
301
23,963
Germany
206
23,967
Spain
278
20,107
Japan
96
20,165
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, Sep 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 |