kitio.aiLex vs Curvedo
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Lex starts at See pricing page and Curvedo starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI writing feedback
- Continue writing
- Shared comments
- Model choice
- Version history
- Automatic source search
- Citations from uploaded PDFs
- AI-generated outlines
- Up to three AI graphs
- 500 to 3,000 word papers
| Feature | Lex | Curvedo |
|---|---|---|
| Best for | Minimal AI word processor for drafting and editing essays | AI academic paper writer that finds and cites real sources |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | Lex | Curvedo |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Lex starts at See pricing page and Curvedo starts at See pricing page. Check both pricing pages for current plans.
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
Lex
- Calm, focused interface
- Feedback rather than just generation
- Easy sharing
- Fewer formatting options than Google Docs
- Small team behind the product
Curvedo
- Cites real sources, not invented ones
- Works with your own PDFs
- Adjustable length up to 3,000 words
- Paper length capped at 3,000 words
- Pricing not shown before signup
- Submitting drafts may break school AI policies
Which one should you choose?
Choose Lex if you want:
- Calm, focused interface
- Feedback rather than just generation
- Easy sharing
Watch out: fewer formatting options than google docs.
Choose Curvedo if you want:
- Cites real sources, not invented ones
- Works with your own PDFs
- Adjustable length up to 3,000 words
Watch out: paper length capped at 3,000 words.
Lex vs Curvedo FAQ
What is the difference between Lex and Curvedo?
Lex: Minimal AI word processor for drafting and editing essays. Curvedo: AI academic paper writer that finds and cites real sources. Both are writing tools.
Is Lex or Curvedo cheaper?
Lex starts at See pricing page and Curvedo starts at See pricing page. Check both pricing pages for current plans.
Do Lex and Curvedo have free plans?
Lex: Yes. Curvedo: Yes.
Who makes Lex?
Lex is made by Lex, based in United States.
Who makes Curvedo?
Curvedo is made by Curvedo.
Which should I choose, Lex or Curvedo?
Choose Lex if you value calm, focused interface and feedback rather than just generation. Choose Curvedo if you value cites real sources, not invented ones and works with your own pdfs.