What is Caktus?
Caktus is an AI-powered study platform built for students. It gathers more than 25 specialised tools for writing, maths, science and research on one site, and its homepage says it is trusted by over three million students.
It works by giving each task its own tool. You choose the essay writer, maths solver or another helper, enter your question or assignment details, and the AI returns a draft, a worked solution or study material that you then review and edit.
Key Features
Caktus’s key features are more than 25 study tools on one site, led by an essay writer with academic citations, a step-by-step maths solver, a research and citation finder, a flashcard maker and science assistants.
- Essay writer: Drafts essays with what Caktus calls real, verifiable academic citations. You choose the essay type, the length and a citation style: APA, MLA, Chicago or Harvard.
- Maths solver: Works through algebra, calculus, statistics and other problems step by step, with an explanation of each stage so you can follow the method.
- Research and citation finder: Searches scholarly databases for credible sources and generates formatted citations to match your reference style.
- Flashcard and quiz maker: Turns lecture notes, PDFs or a topic into flashcard decks and quizzes for revision. Uploads include PDFs, Word documents and text files.
- Science and STEM assistants: Dedicated helpers cover physics, chemistry and biology, including balancing chemical reactions and kinematics problems.
- Text humaniser: Rewrites AI-generated text into more natural prose using four presets: Standard, High School, College and Scholarly. Using it to hide AI work can breach school rules.
- Other tools: The 25+ tools also include a summariser, notetaker, translator, presentation maker, paragraph generator, AI detector, discussion board responder and interview prep coach.
Pros
Caktus’s main advantages are tools built around real coursework, coverage of writing, maths and science in one subscription, citations drawn from scholarly sources and a free look before you pay.
- Made for students: Each tool matches a coursework task, such as an essay, a problem set or a revision deck, so there is no prompt writing to learn.
- Many subjects in one place: Writing, maths, physics, chemistry and biology tools sit under one login, alongside research and note-taking helpers.
- Citations included: The essay writer and citation finder draw on scholarly databases and format references in APA, MLA, Chicago or Harvard.
- Free to explore: Caktus says you can explore the platform and try several tools for free, and both paid plans start with a 1-day free trial.
- Annual plan halves the cost: The yearly plan costs $180, equal to $15 a month, against $30 on monthly billing.
- Widely used: The site says more than three million students use Caktus, the company’s own figure.
Cons
Caktus’s main drawbacks are the academic integrity risk of submitting AI-written work, a $30 monthly price with only a 1-day trial, and answers and citations that still need checking.
- Academic integrity risk: Many schools and universities restrict AI-written work. Submitting Caktus output as your own can breach those rules, so check your institution’s policy.
- Humaniser raises concerns: A tool that makes AI text sound human can be used to disguise it. Doing so may violate school policy even where AI help is allowed.
- Expensive month to month: The monthly plan costs $30, more than directories quote. The cheaper $180 annual plan means paying for a full year upfront.
- Very short trial: The free trial on paid plans lasts one day, which leaves little time to test 25+ tools before the first charge.
- Answers need checking: Solutions and citations can still be wrong. Open each source and rework the steps before relying on them.
- Limits not published: The pricing page does not state usage limits or what the free tier includes beyond trying several tools.
Who is Using Caktus?
- High school and university students: Get help with essays and problem sets.
- STEM students: Check maths and science working.
- Revision planners: Create flashcards from lecture notes.
- Researchers in training: Find and format sources.
Pricing
Caktus lets you try several tools for free, and full access costs $30 per month or $180 per year (official prices, October 2026).
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | Explore the platform and try several tools |
| Monthly | $30 / month | Full access, 1-day free trial, cancel before the next charge |
| Annual | $180 / year | Full access, 1-day free trial, equal to $15 a month |
Directories still list older prices of about $9.99 to $14.99 a month.
Disclaimer: Pricing can change. Check the official Caktus website.
What Makes Caktus Unique?
Caktus stands out for being built around student tasks. A general chatbot can write and solve too, but Caktus packages each job as a dedicated tool and ties its essay writer to academic sources, which reduces the invented references common in general AI.
Compatibilities and Integrations
- Platform: Web app in any browser.
- Inputs: Typed questions, notes and PDFs.
- Outputs: Text you can copy into your own documents.
- API: No public API confirmed.
Caktus Tutorials
You can learn how to use Caktus in a few minutes:
- Open caktus.ai and choose a tool for your task.
- Enter the question, topic or assignment brief.
- Read the output and check every citation and calculation.
- Rewrite the work in your own words and follow your school’s AI policy.
How We Rated It
| Criterion | Score | Why |
|---|---|---|
| Accuracy and Reliability | 4.0/5 | Check answers and sources |
| Ease of Use | 4.5/5 | Pick a tool and type |
| Functionality and Features | 4.6/5 | 25+ study tools |
| Performance and Speed | 4.4/5 | Fast responses |
| Customization and Flexibility | 4.0/5 | Tool-specific options |
| Data Privacy and Security | 4.0/5 | Standard policies |
| Support and Resources | 3.9/5 | Basic help |
| Cost-Efficiency | 4.1/5 | Student pricing |
| Integration Capabilities | 3.2/5 | Standalone |
| Overall Score | 4.1/5 | Average of the nine criteria |
Summary
Caktus is a capable all-in-one study aid for students who use it to learn, check and revise. It becomes a risk if you submit its output as your own. Read your institution’s rules first, and treat every answer as a draft to verify. Check the price on the official site before paying, because published figures differ between review sites.
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