If you want a virtual assistant that can help you find information on the web and research products, Unriddle is worth a look. This AI-powered service gives you immediate answers to questions, summarizes information and helps you grasp it better. It can handle big PDF files and works in more than 90 languages, so it's good for researchers who have to read and extract information from lots of documents.
You could also look at Layer, which is geared specifically to automating research. It's got features like Instant Extraction, Precise Answers, PDF Insights and a Notebook where you can store information that's relevant to your work. It's designed to speed up research, so it's good for researchers, journalists, scientists and strategists who need to get information as quickly as possible.