NotebookLM
Google's free research notebook that answers questions only from the sources you give it.
Free
12 free tools
4 are completely free and 8 have a free plan with paid upgrades. Sorted by popularity.
← All Learning & Lifestyle tools, free and paidGoogle's free research notebook that answers questions only from the sources you give it.
Free
Chat about the trip you're dreaming of and watch an itinerary and map take shape.
Free
Answer a few questions about how you feel and get an overview of possible causes.
Free
Tell it your dream trip in a chat and get a day-by-day plan with flights and hotels.
Free
Ask a question, get a clear answer with links to where the information came from.
Free · Pro $20/mo
Chat with fictional characters, famous personas or your own creations, just for fun.
Free · c.ai+ $9.99/mo
Duolingo's premium tier adds AI conversations and explanations of where you went wrong.
Free · Max $29.99/mo
Make or borrow flashcards, then let AI turn your notes into tests and study guides.
Free · Plus $7.99/mo
A research assistant that finds relevant papers and pulls key findings into a tidy table.
Free · Plus $12/mo
Ask a research question and see what the scientific literature actually says about it.
Free · Premium $11.99/mo
Type what you want to do next and an AI storyteller spins your adventure in any direction.
Free · from $9.99/mo
A gentle chat companion for working through stress and low moods with guided exercises.
Free · Premium plans
Our shortlist: Perplexity (new, $20), NotebookLM (new, free) and Character.AI (new, $9.99).
Absolutely — 12 tools here have a free plan. We’d start with Perplexity, NotebookLM and Character.AI.
Most paid plans sit around $11.99/month. The cheapest we list starts at $7.99, the priciest at $29.99.
7 offer an API — handy if you want to plug them into your own product. Try Character.AI, Quizlet and Elicit.