Question: Looking for a solution that allows me to extract information from PDF files by asking questions, do you know of any such tool?

If you're looking for a way to extract information from PDFs by asking questions, AskYourPDF is also worth a look. This AI chat app uses ChatGPT so you can use a conversational interface to interact with your documents. It has a Chrome extension for easy installation and works with other tools like a mobile app and a Zotero plugin. The tool is designed to boost productivity by quickly extracting information from long PDFs, and it offers several pricing plans depending on your needs.

Another option is ChatPDF, an AI information retrieval system based on GPT-4 technology. You can upload PDFs in batches and ask natural language questions, so it's good for students, researchers and lawyers. With its security controls and multilingual support, ChatPDF is designed to help you work more efficiently and make better decisions.

ChatPDF also offers a more powerful system for understanding PDFs, particularly academic papers and legal contracts. It can handle multi-file chats and offers answers that include citations to the original source material. That makes the answers more authoritative and actionable, and it's a good tool for anyone who needs to get a quick handle on complex information.

If you're looking for a more general-purpose tool, check out PDFGPT.IO. The system lets you ask questions and get answers from PDF documents. It's good for study aids, customer support and workflow improvements. With serious security controls and APIs for integration, PDFGPT.IO is a good option for personalized learning and data extraction.