PDF.ai is an AI-powered platform that enables users to interact with their PDF documents conversationally, allowing users to ask questions and receive instant, accurate answers directly from the content of their documents. Reviews of PDF.ai are mixed to negative, with users reporting billing frustrations, hard-to-cancel trials, poor support, and unreliable outputs—missing document titles, emails, and multi-PDF functions. The platform does work well for quick document summarization and initial exploration. However, several users note errors, vague model disclosures, and concerns about sustainability of lifetime pricing. For teams building production workflows around the API, the accuracy degradation and lack of transparency about which underlying models power extraction are material blockers.