kitio.aiDiffit vs LumenRead
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. LumenRead is completely free, while Diffit is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Leveled reading passages
- Vocabulary lists
- Question generation
- Google and Microsoft export
- Standards alignment
- WPM reading speed test
- AI comprehension questions from your text
- Paste or upload your own text
- Guided pacing by word or sentence
- Chinese and Japanese tests
| Feature | Diffit | LumenRead |
|---|---|---|
| Best for | Turn any article, video or topic into reading at multiple levels | Reading speed test with AI-made comprehension questions |
| Category | Education | Education |
| Pricing model | Freemium | Free |
| Starting price | $14.99/mo | Free |
| Free plan | Yes | Yes, fully free |
| Made by | Diffit | LumenRead |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
LumenRead is completely free, while Diffit is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Diffit
- Fast differentiation from any source
- Supports many languages
- Free plan is useful
- Exports require the paid plan
- Questions sometimes need editing
LumenRead
- Free with no sign-up
- Works with your own reading material
- Text is not stored on the server
- Only three questions per test
- Library has just six passages
- Focused on testing more than teaching
Which one should you choose?
Choose Diffit if you want:
- Fast differentiation from any source
- Supports many languages
- Free plan is useful
Watch out: exports require the paid plan.
Choose LumenRead if you want:
- Free with no sign-up
- Works with your own reading material
- Text is not stored on the server
Watch out: only three questions per test.
Diffit vs LumenRead FAQ
What is the difference between Diffit and LumenRead?
Diffit: Turn any article, video or topic into reading at multiple levels. LumenRead: Reading speed test with AI-made comprehension questions. Both are education tools.
Is Diffit or LumenRead cheaper?
LumenRead is completely free, while Diffit is freemium.
Do Diffit and LumenRead have free plans?
Diffit: Yes. LumenRead: Yes, fully free.
Who makes Diffit?
Diffit is made by Diffit, based in United States.
Who makes LumenRead?
LumenRead is made by LumenRead.
Which should I choose, Diffit or LumenRead?
Choose Diffit if you value fast differentiation from any source and supports many languages. Choose LumenRead if you value free with no sign-up and works with your own reading material.