WebCopilot

WebCopilot is a Chrome extension that lets users chat with their own documents while browsing any website. Users upload PDFs, text files, notes and URLs into a knowledge base, and the service chunks, embeds and indexes the content so it can be searched by meaning rather than exact keywords. The extension can then be opened on any page to ask questions and get answers drawn from the user's own material. It is aimed at researchers, knowledge workers and teams who keep notes, documentation and reference material and want it available alongside whatever they are reading. Features include support for multiple knowledge bases, so work, research and side projects can be kept apart, natural conversation with follow up questions, and source citations that link each answer back to the specific document and page. A full REST API allows developers to embed a knowledge base in their own applications. The site presents the product as a personal second brain that travels with the user across the web. Pricing is published on the vendor's pricing page. The Free plan costs $0 per month and includes one knowledge base, 10 document uploads and 50 AI queries per month, with community support. Premium is $19 per month, or $169 per year, and removes those limits with unlimited knowledge bases, uploads and queries, plus priority support and API access. Team licenses are available by contacting the vendor. A refund policy is linked from the pricing page.