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Each cell counts sites that run Spectra, fall in that traffic tier, and carry that site category. The 7 largest categories for Spectra get a column; everything else is in Other.
| Traffic tier (est. monthly visits) | Business Services | Software & Technology | Health & Medicine | Nonprofit & Community | Real Estate & Construction | Education | Travel & Transportation | Other or none | Tier total |
|---|---|---|---|---|---|---|---|---|---|
| 1B+ | — | — | — | — | — | — | — | — | 0 |
| 100M to 1B | — | — | — | — | — | — | — | — | 0 |
| 10M to 100M | — | — | — | — | — | — | — | — | 0 |
| 1M to 10M | 3 | 6 | 2 | 2 | 1 | 6 | 5 | 35 | 60 |
| 100K to 1M | 40 | 84 | 26 | 95 | 6 | 159 | 64 | 875 | 1,349 |
| 10K to 100K | 625 | 444 | 534 | 649 | 264 | 1,079 | 735 | 24,384 | 28,714 |
| Under 10K | 682 | 231 | 1,191 | 420 | 334 | 607 | 417 | 51,327 | 55,209 |
| Long tail | 15,783 | 11,630 | 6,842 | 4,983 | 5,037 | 3,481 | 3,628 | 424,309 | 475,693 |
| Spectra total | 17,133 | 12,395 | 8,595 | 6,149 | 5,642 | 5,332 | 4,849 | 500,930 | 561,025 |
Traffic tiers use our estimated monthly visits for September 2026. 85,332 of the 561,025 Spectra sites have an estimate. The long tail is the rest.
Site categories are ours, one per site. 98,106 Spectra sites carry one. The other 462,919 have none yet and count under Other, as do adult sites.
A free account doubles this list and turns on country and language filters. Paid plans download the whole list as a file.
