Open Paper
Hi HN! Open Paper allows you to annotate and understand your research papers with an AI copilot. I wanted a paper-reading assistant that let met actually dig into papers in-place while benefiting from AI tooling. When it comes to studying, I'm not a fan of the typical chat interfaces that obfuscate uploaded files and turn them into black box 'content'. Hence, I've implemented a split-pane view. To mitigate the risk of hallucinations, all AI responses come with grounded citations that refer back to the source material in-flow. Some feature highlights: - Actually read your papers in one place…
Open Paper launched on May 31, 2025 with 289 votes, #92 of 7,905 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Open Paper is an AI-native workbench designed for reading, annotating, and understanding research papers. It combines document review tools with AI assistance, where each AI-generated response includes citations to the source material for verifiability. Available as both open-source and SaaS options, it targets researchers and academics seeking faster comprehension of complex papers through grounded AI analysis.
written from the facts on this page · September 2026
From the sources
Open Paper gives you a single place to read, annotate, and understand papers with the help of AI. Each AI response is grounded in citations, giving you info you can actually trust. We're building the fastest way to understand research.
The fastest way to annotate and deeply understand research papers.
In the maker’s words, at launch
Hi HN! Open Paper allows you to annotate and understand your research papers with an AI copilot. I wanted a paper-reading assistant that let met actually dig into papers in-place while benefiting from AI tooling. When it comes to studying, I'm not a fan of the typical chat interfaces that obfuscate uploaded files and…
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