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.
