Research

Free AI tool that summarizes text, PDFs, Word docs, PPTs, and videos using NLP, with a free tier of 30 credits and support for 50+ languages.

Open-source AI tool for screening and labeling literature.

AI search engine for scientific research with free daily queries.

AI-powered web search API built for agents and developers, offering 20,000 free requests per month with token-efficient, cited results across docs, repos, and the open web.

Upload academic PDFs and highlight confusing sections to get instant, simple AI explanations in plain language, with a free tier for unlimited highlights and follow-up questions.

Google's AI research assistant that builds source-grounded notebooks from uploaded PDFs, websites, and audio; free tier includes up to 100 notebooks and audio overviews.

Free AI PDF and document assistant that answers questions across uploaded files with cited sources, offering a free tier with up to 60 pages per month.

Interactive literature maps with AI suggestions for related papers.

AI answer engine with cited sources. Free tier with pro features available.

AI-powered gadget finder that uses an LLM to evaluate and compare CPUs, screens, and other specs across handhelds, tablets, and phones, free to use.

AI-assisted systematic review screening; free for academic use.

AI-driven paper recommendations and collection tool; free to use.

AI research agent that chats with PDFs, generates literature reviews, and provides citation-backed answers, with a free tier for basic research tasks.

Smart citations and AI analysis of how papers are cited; free tier.

AI-powered academic search engine that indexes hundreds of millions of research papers and surfaces citations, trends, and author profiles; completely free to use.