Coral AI is a powerful tool that can extract information from PDFs in more than 90 languages. It also offers summarization, question answering, translation, citation generation and a study guide generation tool. The service is geared for people who want to quickly digest and understand lots of different documents.
DocsDNA is another strong contender, particularly when it comes to multilingual support for documents and with tools for analysis, collaboration and OCR. It offers user management and consulting services to help you integrate AI document management without worrying about data security and privacy.
If you're looking for a more research-oriented tool, Avidnote supports multiple languages and offers tools for writing research papers, rewriting text, generating literature reviews and summarizing documents. It also offers advanced AI templates for different research methods and protects your data with GDPR-compliant servers.