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ChatGPT is OpenAI's general AI assistant. It chats, writes, codes, reasons, browses the web, and can read files you upload.

Gemini is Google's AI assistant with a very large context window and deep integration across Gmail, Docs, Drive, and the rest of Google Workspace.

Claude is Anthropic's AI assistant, known for strong writing and reasoning, a very large context window, file upload, and Projects for grouping documents and chats.

Notion AI is the AI built into the Notion workspace. It summarizes, writes, brainstorms, and answers questions across your Notion pages and uploaded docs. It is a general productivity assistant inside a notes app, not a purpose-built study tool.

Google NotebookLM is a free, source-grounded research and Q&A tool. You upload your sources, ask questions with inline citations, and generate study guides, FAQs, timelines, and an audio overview that two AI hosts discuss like a podcast.

YouLearn is an AI tutor that turns PDFs, YouTube videos, slides, and websites into notes, flashcards, quizzes, and chat.

StudyFetch is an AI study platform built around Spark.E, a tutor that turns your uploaded notes, lectures, and PDFs into flashcards, tests, and chat.

Mindgrasp is an AI study tool that turns lectures, PDFs, videos, and recordings into notes, summaries, flashcards, and quizzes.

Knowt is a free Quizlet alternative with flashcards, practice tests, notes, and AI that turns PDFs, videos, and lectures into study material.

Acemate is an AI study platform that turns your uploaded slides, textbooks, and past exams into practice exams, quizzes, and flashcards, with source citations and a community library of university courses.

Penseum is a free AI study tool. You upload your PDFs, slides, videos, and notes, and it makes flashcards, quizzes, practice exams, and study guides, with a 24/7 chat tutor on top.

QuizGecko is an AI quiz and test maker that turns text, a URL, or a document into quizzes, flashcards, notes, and podcasts, with LMS export for teachers.

Brainly is a homework-help app: a student community plus an AI tutor. You snap a photo of a question and get a step-by-step answer. Answers come from the community and AI trained on the open web, not from your own course material.

Scholarcy is an AI summarizer that turns research papers, articles, and book chapters into structured flashcard-style summary cards, pulling out key points, figures, tables, and references.

Monic.ai was an AI study space that turned PDFs, slides, videos, and audio into quizzes, flashcards, summaries, and simulated exams. Its service ended on March 7, 2026.

Cramify is an AI study helper that turns uploaded notes and slides into summaries, quizzes, cheat sheets, and mock exams, and solves problems with step-by-step explanations.

Studyable is a mobile-first AI study app with a chat tutor, a photo math solver, flashcards, quizzes, and essay feedback.

Answers AI is an AI homework solver and tutor. You snap a photo or paste a question across subjects and get answers and step-by-step explanations, plus some study tools from videos, PDFs, and links.

Quizlet is the long-running flashcards app: a huge library of user-made study sets, Learn, Test, and Match modes, plus AI tools like Magic Notes and Q-Chat.

Anki is a free, open-source flashcard app built around a powerful spaced-repetition scheduler. You make the cards, Anki schedules the reviews.

Brainscape is a flashcard app built on confidence-based repetition, with expert-certified decks, millions of user decks, and AI flashcard generation from your files.

RemNote is an all-in-one note-taking app with spaced-repetition flashcards built right into your notes, plus AI generation and PDF annotation.

MemoCards (Memo AI) is an AI study workspace that turns PDFs, slides, videos, and text into flashcards, practice tests, notes, and mind maps, with spaced-repetition review.