The 2019 Ranking Digital Rights Corporate Accountability Index evaluated 24 of the world's most powerful internet, mobile and telecommunications companies on their disclosed commitments and policies affecting freedom of expression and privacy of internet users across the world. 

Now in its fourth iteration, the RDR Index has continued to expand each year. Beginning in 2015, RDR evaluated 16 internet and telecommunications companies using 31 indicators. Then in 2017, RDR evaluated 22 telecommunications, mobile and internet companies using a revised methodology made up of 35 indicators. Now the fourth edition of the RDR Index has grown to include two more companies, for a total of 24, and RDR is planning to once again revise its methodology and add companies for the next edition of the ranking, scheduled for 2021. 

 As a note: with the revision of Ranking Digital Rights' methodology in 2017, the 2015 scores are not easily comparable to the second, third and fourth rankings.

Companies' total score consists of the accumulated scores they received across all indicators in the categories 'Goverance', 'Freedom of Expression' and 'Privacy'

For most recent full results, methodology and background, see https://rankingdigitalrights.org/index2019/