In our 23-criteria evaluation of cognitive search and knowledge discovery solution providers, we identified the nine most significant ones — Attivio, Coveo, Elastic.co, Hewlett Packard Enterprise (HPE), IBM, Lucidworks, Mindbreeze, Sinequa, and Squirro — and researched, analyzed, and scored them. This report shows how each provider measures up and helps application development and delivery (AD&D) professionals make the right choice. This is an update of a previously published report; Forrester reviews and updates it periodically for continued relevance and accuracy.