Factiva from Dow Jones is a data service that helps companies identify opportunities, accelerate decisions and manage a business's reputation, that includes global news and data accessible via the Dow Jones' research platform, on mobile devices or integrated via advanced feeds and APIs.
Each of the tools I have described share the same kind of premise: the main thing they do is source and collect media content. Then to varying degrees they run filters against this content and produce a range of data visualisations and ways of slicing the data and content. …
I have used Lexis Nexus and Thomson One. I find Factiva to be the most user friendly of these services. I much prefer Factiva's layout on their website when I search for articles and I also prefer its search builder over Lexis Nexus and Thomson One.
At the time, Factiva was already being used by the company I worked for - they had developed procedures specifically for using Factiva, so there wasn't really an option. I've used Lexis, Westlaw and Bloomberg exclusively for legal research, so there wasn't really an overlap …