Free AI Research · Updated August 2026

Free AI Research Tools (2026): Search, Papers & Citations

Find answers faster with sources you can verify — from AI search to academic paper discovery.

Perplexity Free tier
Search + AI answers with citations to real sources.
Google Scholar Free
Academic search — pair it with any AI chat for literature research.
Semantic Scholar Free
AI-powered academic search with paper recommendations.
Elicit Free credits
Ask research questions and get structured answers from papers.
Consensus Free tier
Search engine that surfaces answers directly from scientific studies.
SciSpace Free tier
Chat with papers and get explanations of complex research.
Connected Papers Free
Visual graph of related academic papers — great for mapping a field.

Browse other categories: AI Chatbots · AI Image Generators · AI Photo Tools · AI Video · AI Audio & Voice · AI Productivity · AI Coding

Heads up: free tiers change constantly — a tool that's free today may add limits tomorrow. This page is updated regularly, but always check the official site before relying on a free plan.

Free tools we built

Handy free tools, no sign-up

📄 PDF Merge Online

Combine multiple PDF files into one — free, no upload, files stay on your device.

📷 ID Photo Studio

Passport & visa photos with AI background changer, compressor & converter.

🧮 HK Salary Tax Calculator

Estimate Hong Kong salaries tax for 2026/27 in seconds.

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