Most "free AI for students" articles list twenty tools and explain none of them. This one covers a single question: what can you actually build without paying, and is it useful?
What a free tier gives you
Typically one chatbot with a document or two. That sounds limiting, and for a business it is. For a student it is often exactly enough.
One chatbot over one well-chosen document covers:
- A full unit's lecture notes
- One textbook chapter you keep returning to
- A combined revision document you assembled yourself
- Your resume, for job applications
The constraint is the number of files, not the number of pages. A forty-page document is still one document. The exact limits are on the free plan page.
Make the one document count
This is the whole trick. Rather than uploading a single lecture PDF, build one combined file first:
- All lecture notes for the unit, in order
- The relevant textbook section
- Past paper questions with solutions
- Your own notes on the parts you find hard
Now your one free chatbot covers an entire unit instead of one lecture. Combining before uploading is the difference between a toy and something you would actually revise from.
Word or Google Docs exported to PDF works fine. The PDF chatbot guide covers what makes a good source file.
What to check before trusting it
Ask it three things:
- Something clearly in your notes. Should be accurate.
- The same thing in your own words. This is the point; if it only works when you quote the notes exactly, it is not helping.
- Something you never uploaded. It must say it does not know.
Test three matters most for studying. If it invents an answer about your syllabus, you cannot tell the invented answers from the real ones during revision, and you will find out in the exam.
Use it in ways that actually help
Ask, do not read. Answer the question yourself first, then compare. Retrieval practice beats rereading, and this makes it low-friction.
Ask why, not what. "Why does this step follow?" teaches you more than "what is the answer".
Connect topics. "How does this relate to unit 2?" Cross-topic questions are where exams live and where notes are weakest.
Do not submit its output. Beyond the integrity problem, you will do fine on the assignment and badly in the hall.
Share it with your class
Every chatbot gets a link anyone can open, with no account and no install.
So the free tier scales further than it looks: four people each build one unit chatbot on their own free account and share links. You now have four units covered, for nothing.
That is genuinely the best use of a free tier as a student, and the reason to build it with a tool that can share and embed rather than in a personal notebook app. The NotebookLM alternative page compares the two honestly.
When to upgrade
Upgrade when you hit a real wall, not before:
- You want separate chatbots per subject rather than one combined document
- Your material is bigger than the file size or page limit
- You want to add lecture recordings alongside notes
- You want it through the whole semester, not just exam week
There is a Student plan priced for individuals rather than businesses, in your local currency. Current numbers are on the pricing page.
What it will not do
It will not replace reading the material. It answers from what you gave it. If you never read it, you cannot tell when an answer is thin.
It will not solve problems that require working. For derivations and numericals it explains steps, but you still have to do them.
It is only as current as your upload. Notes updated, document re-uploaded.
A realistic setup for one semester
- Build one combined document per subject rather than per lecture
- Add material as the semester goes, not the night before
- Include past papers; they teach it how your course phrases questions, which differs from the textbook
- Set the response style to detailed; you want reasoning, not one-liners
Do that and by exam week you have something worth revising from, built for free, in pieces, without a crunch. The study notes chatbot guide turns this into a four-week schedule.
Frequently asked questions
Do I need a card to start? No. The free plan needs an email and nothing else, and it does not expire into a paid plan.
Can I use it for more than one subject on the free plan? One chatbot at a time. Either combine subjects into one document, which gets messy, or coordinate with classmates so each person's free chatbot covers one subject.
Does the free chatbot show a badge? Yes, a small Cortexvia mark on the widget and hosted page. It makes no difference to how it answers. The students page covers what the Student plan adds.
