Overview
We tested 8 AI quiz generators head-to-head. Here's which ones actually produce quality questions — and which ones waste your time.
AI quiz generators have exploded in popularity, but not all are created equal. We tested 8 of the most popular AI quiz generators by feeding each one the same 30-page biology PDF and evaluating the results on quality, accuracy, speed, and cognitive depth.
What We Tested
We evaluated each tool on:
- Question quality — Are questions clear, accurate, and pedagogically sound?
- Cognitive depth — Does it generate higher-order thinking questions (analysis, evaluation) or just recall?
- Speed — How fast does it generate questions?
- Input flexibility — Can it handle PDFs, URLs, videos, and text?
- Export options — Can you export to LMS formats?
- Pricing — What do you actually get for free?
The Results
1. QuerySpark — Best Overall
Score: 9.2/10
QuerySpark stood out for its Bloom's Taxonomy integration — every generated question is tagged with its cognitive level (Remember, Understand, Apply, Analyze, Evaluate, Create). This is a genuine differentiator no other tool offers.
- ✅ Bloom's Taxonomy mapping on every question
- ✅ Accepts PDF, URL, YouTube, and text input
- ✅ Built-in spaced repetition study mode
- ✅ Voice study mode for hands-free review
- ✅ Generous free tier
- ⚠️ No LTI integration yet
2. Quizgecko — Best for Simple Quizzes
Score: 7.8/10
Quizgecko produces clean, simple quizzes quickly. Good for basic recall questions, but lacks depth for higher-order thinking.
- ✅ Clean interface
- ✅ Fast generation
- ⚠️ Mostly recall-level questions
- ❌ No Bloom's taxonomy support
- ❌ Limited free tier
3. Questgen — Best Budget Option
Score: 7.2/10
Questgen offers decent question generation at a low price point. Question quality is inconsistent — some are excellent, others miss the mark.
4. Quillionz — Best for Educators
Score: 7.5/10
Designed specifically for teachers, Quillionz offers classroom-focused features. However, the AI quality lags behind newer competitors.
5. PrepAI — Best for Test Prep
Score: 7.0/10
PrepAI focuses on standardized test preparation. Good for SAT/GRE-style questions but limited in other formats.
6. Revisely — Most User-Friendly
Score: 7.3/10
Beautiful interface and easy to use, but the AI generates relatively surface-level questions.
7. Quizizz AI — Best for Live Classroom
Score: 7.6/10
Excellent for live classroom engagement with gamification features. AI generation quality is moderate.
8. ChatGPT — Most Flexible (But Manual)
Score: 6.5/10
You can prompt ChatGPT to generate quiz questions, but there's no built-in study mode, export, or spaced repetition. Requires significant manual formatting.
Comparison Table
| Tool | Bloom's Taxonomy | PDF Input | Study Mode | Free Tier | Score |
|---|---|---|---|---|---|
| QuerySpark | ✅ Full | ✅ | ✅ SR + Voice | ✅ Generous | 9.2 |
| Quizgecko | ❌ | ✅ | Basic | Limited | 7.8 |
| Quizizz AI | ❌ | ❌ | Live only | ✅ | 7.6 |
| Quillionz | Partial | ✅ | ❌ | Limited | 7.5 |
| Revisely | ❌ | ✅ | Basic | ✅ | 7.3 |
| Questgen | ❌ | ✅ | ❌ | ✅ | 7.2 |
| PrepAI | ❌ | ✅ | ❌ | Limited | 7.0 |
| ChatGPT | Manual | ❌ | ❌ | Limited | 6.5 |
Our Recommendation
For students who want the most effective study tool, QuerySpark is the clear winner. The Bloom's Taxonomy mapping ensures you're not just memorizing facts — you're building genuine understanding. Combined with built-in spaced repetition and voice study mode, it's the most complete package available.
For live classroom engagement, Quizizz is hard to beat. For budget-conscious users who just need basic quizzes, Questgen gets the job done.
Try QuerySpark free and see the difference Bloom's Taxonomy-mapped questions make in your studying.
