AI tools for research, document summarization, and knowledge discovery.
AI search engine with cited sources.
Perplexity is an AI-powered search engine that gives direct answers with real-time web citations. Free tier offers unlimited basic searches and access to GPT-4o Mini.
AI research assistant for papers.
Elicit searches and summarises academic papers automatically. Find relevant studies, extract key findings, and build literature reviews without reading every paper. Free tier: 5,000 credits/month.
AI article summariser for students.
Scholarcy reads research papers, reports, and book chapters and creates interactive summary flashcards. Free browser extension available with daily summaries.
Research & Summarization tools powered by artificial intelligence are transforming the way individuals and teams work. Our directory lists only tools that offer a genuine free tier, free trial, or open-source licence — so you can start immediately with no credit card.
Every tool in this list has been manually reviewed to confirm the free tier is real and accessible. We update this list monthly to reflect pricing changes, new launches, and tool shutdowns.