I have been testing a number of different AI apps for researching within multiple documents. Some are clunky and just not easy to setup and ask questions within multiple documents.

Within a few minutes I had uploaded about 40 documents and created a folder to drop them in. The ask all feature is nice and I also like the highlighting and referencing with links.

Among the 4-5 apps I have tested, this have been one of the best in terms of functionality and organizing my files. It's clean.