I have been looking for something like Cogniflow for a long time. It gives me a ton of new ideas for projects where image, text, or even sound can get analyzed based on my database :D
I had to go for tier 5 on this one :)

Pros:
-The onboarding is great.
-Tons of potential
-Easy to use
-Nice User interface

Cons:
-No documentation or tutorial on how to integrate Cogniflow on, for example, your website.
-Should be possible to restrict the type of file the user uploads to be analyzed. For example, not allow video-files, only images to be uploaded.