Best Free AI Tools for Researching a Topic

Google's AI notebook that grounds every answer in your uploaded documents, PDFs and audio files with source citations.

An AI academic search engine that surfaces the degree of scientific agreement on a question from peer-reviewed papers.

Google's multimodal AI assistant with live web search and deep integration with Gmail, Docs and Drive.

An AI search assistant that answers questions with cited web sources and supports multi-step deep research reports.

Mistral AI's consumer chat product with fast models, web search, image generation and document upload.

AI search built for students and researchers.

Long-context assistant that reads huge documents.

OpenAI's AI assistant for questions, writing, coding and research, with a free tier and paid plans for more capable models.

Anthropic's AI assistant with a long context window, nuanced reasoning and strong performance on writing and analysis.

An AI assistant for everyday and work tasks, with chat, search, drafting and image creation.

An autonomous AI agent for teams and individuals that completes tasks and builds web apps from prompts.

AI research assistant that finds academic papers and drafts cited reports for researchers.