Question: Can you recommend a research tool that allows me to ask follow-up questions and get answers?

If you're looking for a research tool where you can ask follow-up questions and get follow-up answers, Layer is a great option. This AI-powered tool automates research with features like Instant Extraction, Precise Answers, PDF Insights and a Notebook where you can store information. It's geared for researchers, including journalists, scientists and strategists, who need to spend less time doing research and get more useful information, with a free trial option and a Pro option costing $30 per month.

Another option is ChatWithPDF, which streamlines research by summarizing PDFs, YouTube videos and other documents and letting you chat interactively to ask follow-up questions. It's free for up to three documents a day, but premium features come with a subscription. Its clean interface and AI technology makes it useful for researchers, professionals and students who need quick and accurate answers.

Unriddle is another option. This AI assistant works with any document to give you immediate answers and help you understand complex subjects quickly. It has features like summarization, note-taking and collaboration through shared workspaces. With support for more than 90 languages and a Chrome extension for easy integration, it's good for researchers who need to process a lot of information.

If you're focused on PDFs, ChatPDF is a powerful option. You can upload PDFs and ask questions, and you'll get answers and summaries. It can handle multi-file chats and cite sources, too, so it's good for students, researchers and professionals who need to get quick answers out of complex documents.