http://sls.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/technologies/social-media-monitoring
Due to a lack of transparency on these tools, information is only gleaned from documents obtained via public records requests, some of which are several years old. It’s therefore not entirely clear which of these firms are still being used and by whom. There are likely other firms not on the list.