CodeIgniter vs Flask
Head-to-head usage across the sites we track.
Top sites by authority
CodeIgniter · Flask · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
11
3
Open Page Rank 8+
187
12
Open Page Rank 7+
731
33
Open Page Rank 6+
1,360
47
Open Page Rank 5+
2,426
66
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
CodeIgniter · Flask · share of sites in each country using one or the other
India
17,846
242
Indonesia
13,132
175
United States
9,656
279
Brazil
5,910
166
United Kingdom
5,381
138
Türkiye
4,412
85
Germany
3,335
214
France
3,230
291
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | CodeIgniter | Flask |
|---|---|---|
| LCP | 1.8 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 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.