Every provider ranked here is ranked by real, disclosed buyer relationships — filings, case studies, and public customer lists — across 20 categories and thousands of analysed companies. Not vendor self-reporting, not a review-site composite.
Combines each provider’s disclosures across all 20 stack layers into one ranking — the question a single category leaderboard can’t answer on its own: who’s the most-used provider in the whole dataset, full stop.