There are several ways to find rankings of SASE vendors. Firstly, you can search for industry reports and rankings published by major technology media and research institutions such as Gartner, Forrester, IDC, etc. These well-known institutions often release reports that include information on SASE vendor market share, trends, and rankings. Additionally, you can consult industry-specific websites like SDxCentral, Network World, etc., as they frequently publish rankings and analysis of SASE vendors. Furthermore, you can refer to professional market research companies such as ABI Research, IHS Markit, etc., as they also publish market research reports covering rankings of SASE vendors. Lastly, you can use search engines to search for keywords such as "SASE vendor rankings" or "SASE market reports" to find the latest industry ranking information.