This index is editorially independent. The rules below govern how it stays that way.
No company can pay, or has paid, to appear on this list, to be ranked higher, or to be excluded. Ranking order is produced entirely by the weighted methodology.
Our analyst discloses any commercial relationship with a listed company before publication. Where sponsorship is accepted elsewhere on the site, it is labeled and never affects ranking order or score.
Claims are checked against a primary public source — a certification registry, an analyst report, a CVE database, or the vendor's own published documentation — before being cited. See sources & data.
Factual errors are corrected as soon as they're verified, with a visible update note. Report one via our contact page.
The full index is rescored quarterly. A company can be added, removed or re-tiered between cycles if a material change is verified.
Reach the editorial team directly, or read the disclaimer that governs how this content should be used.