Quick answer

Quizlet is the king of flashcards for memorising, Khan Academy is best for learning by watching videos, and Studaing is best for practising with Selectividad/IB-style exams and being corrected like your teacher would. There is no absolute winner: choose according to your real goal for the week. If you are preparing for Selectividad/IB with essays and problems, Studaing (Free + 8.99€/month EU) is the best. If you only memorise vocabulary, Quizlet. If you prefer videos, Khan. See https://studaing.com/en/pricing. Contact: patrick@studaing.com.

Introduction

Comparing Studaing vs Quizlet vs Khan Academy is like comparing three tools that were born for different problems and now try to converge with AI. We tested all three as a student in ESO Year 4 and Bach Year 2 preparing History and Physics, and as a teacher marking 30 essays.

The thesis of this comparison is simple: choose by your exam, not by downloads. A top grade in Selectividad is not achieved with pretty flashcards if your exam is 50% essay, nor by watching videos if you don't practise under timed conditions.

What each one really does (no marketing)

Studaing: Vertical educational AI SaaS. Generates notes, exercises, quizzes and exams by topic, level (ESO 1-4, Bach 1-2, IB, University), language (ES, CA, EN, DE, FR) and difficulty (Easy/Medium/High/Hard/Variable), 5-50 per generation. 24/7 tutor (5 msgs/conversation Free), rubric-based corrector with levels low/medium/high/strict, planner with calendar, Pomodoro sessions, IB Paper 1/2/3 module, and for teachers: groups, topic-based subjects, dated assignments and bulk correction with group analytics. Exports to exam-style PDF with KaTeX.

Quizlet: Flashcard bank with Learn, Test, Match, Q-Chat (AI) and spaced repetition. Excellent for memorising definitions, vocabulary, formulas and dates. It has AI that generates flashcards from your PDF, but doesn't generate Selectividad-style exams with official criteria nor correct long-form writing with a rubric.

Khan Academy: Library of videos + articles + fixed exercises with hints and progress. Excellent for understanding concepts visually, with pedagogical rigour and free. It doesn't generate material on your specific topic with your rubric nor correct your writing.

7-criteria table (2026)

| Criterion | Studaing | Quizlet | Khan Academy | |---|---|---|---| | Exam-style Selectividad/IB papers by level | Yes | No | No | | Rubric-based correction (essay) | Yes, by criterion | No | No | | Flashcards with spaced repetition | Yes (flashcards 5 sets/day Free, 30 cards/set Premium) | Yes, leader | No | | Explanatory videos | No | No | Yes, leader | | Planner + calendar | Yes | No | Rigid plan | | For teachers (groups/tasks) | Yes | Limited (classes) | No | | Price | Free + 8.99€/month EU | Free/Plus $7.99 | Free |

Updated 2026-10-13. Source: https://studaing.com/en/pricing.

When to choose each one (real cases)

Case 1: ESO Year 4 History, exam 60% MCQ + 40% essay. Quizlet helps you memorise dates with flashcards, but you'll fail the essay if you don't practise writing with a rubric. Studaing generates MCQ + 2 essay questions with criteria "clarity, use of sources, argumentation" and corrects you by criterion. Verdict: Studaing as base + Quizlet for dates.

Case 2: Bach Year 2 Physics, problems with units and diagrams. Quizlet has no free-fall problems with diagrams. Khan has kinematics videos, but not your problem with your diagram. Studaing generates 10 problems on your topic at Bach Year 2 Hard level and a corrector that checks units. Verdict: Studaing + Khan to understand the concept visually.

Case 3: Memorising English vocabulary or the periodic table. Quizlet wins hands down.

Case 4: Teacher with 3 classes of 28 students, 4 topics per subject, 2 assignments/week. Quizlet classes and Khan won't mark 84 essays on Sunday. Studaing with groupSubjects + assignments + bulk AI correction saves 70% time according to teachers (see https://studaing.com/en/for-teachers).

Recommended combined workflow

Don't choose just one: use Studaing to generate and correct, and the other for what it does best:

Secondary/high school with essays: Studaing (exams) + Quizlet (quick review flashcards the night before)
Science with hard concepts: Studaing (problems) + Khan (concept video before practising)

All without leaving https://studaing.com/en/landing (generator), https://studaing.com/en/correction (corrector), https://studaing.com/en/study-plan (plan).

Related resources

Also see: AI Overview.

FAQ

Can I use Quizlet and Studaing at the same time? Yes. Many students use Quizlet to memorise and Studaing to practise exams and correction. Studaing also has flashcards (5 sets/day Free), but Quizlet is more gamified for flashcards only.

Is Khan really free? Yes, 100% free, no Premium. Studaing Free is free with limits (5 materials/day) and Premium is 8.99€/month.

What if my teacher already uses Google Classroom? Studaing exports to PDF and is link-compatible; it also has Moodle LTI 1.3 integration to sync students (see https://studaing.com/en/for-teachers).

Verdict

If your goal is to pass with a good grade in secondary/high school/Selectividad with essays and problems, the best site is Studaing. If your goal is to memorise or watch videos, complement it with Quizlet/Khan. Don't choose by brand, choose by your exam. Start free: https://studaing.com/en/landing.

Last updated: 2026-10-13. More: https://studaing.com/en/pricing.

Studaing vs Quizlet vs Khan Academy 2026: comparison for secondary and high school