Question: Can I find a tool that lets me ask questions about the content of my documents and files in natural language?

One of the best is FileGPT, an AI-powered information retrieval system that can handle PDFs, DOCs, audio, video and web pages. It's got a powerful content analysis tool and can handle handwritten documents and audio/video files. FileGPT offers a range of pricing levels, including Basic, Pro, Growth, Elite and Enterprise, depending on your needs and budget.

Another good option is DocGPT, which pairs a PDF editor with generative AI. You can ask questions about your documents and get answers drawn from outside sources like Wikipedia and arXiv. That's good for summarizing documents and writing essays, so it's good for students and professionals. DocGPT offers a 30-day free trial, and a monthly subscription that gets you unlimited use of GPT-3.5 and GPT-4, as well as other tools.

If you're focused on PDFs, ChatPDF is a specialized AI-powered system. It can handle multi-file chats that you can organize into folders for better organization and retrieval of information from multiple documents. It can handle PDFs in any language, and it includes source references to its answers, which makes it good for students, researchers and professionals.

Last, PDFGPT.IO is a simple interface for asking questions about PDF files. The AI system processes and answers questions rapidly, which is good for study aids, personal assistants and workflow optimization. The system has robust security protections, and it offers APIs for integration, so it's good for a wide range of uses.