Open Paper (application: https://openpaper.ai/ and documentation: https://github.com/khoj-ai/openpaper) allows you to read, annotate and query academic research articles.

The imported pdf document is displayed next to the chatbot that answers questions asked in the conversation or directly on highlighted parts.

Answers anchored in the source text with accurate and verifiable citation.
Annotations and highlights possible.

Generation of audio summaries available, summary or key points in multiple durations.

In the user dashboard, there is a “project” function that allows you to group several documents in the same folder.

A search function is also proposed.

Note: specify for all features “generates in French

Open source.
The free plan allows the import of 10 documents per month, 5,000 chatbot credits per week, 5 audio summaries per week, and 2 projects for 200 MB of space.