Quillbot vs Undetectable AI: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Quillbot and Undetectable AI side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, Quillbot leads on a free plan; Undetectable AI leads on lower entry price. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Quillbot
Your complete AI writing solution for clear, confident, and professional communication.
Best for you if:
- • You want a free tier before you commit
Undetectable AI
Make AI content undetectable and human-like
Best for you if:
- • You want achieves high accuracy in detecting AI-generated content, including paraphrased text
| At a Glance | Quillbot | Undetectable AI |
|---|---|---|
Starts at | Free plan, paid from $7.50/user/mo, billed monthly Team plan | From $5/mo, billed monthly 10K words/month (Yearly) plan |
Category | AI Writing Writing & Content | Writing & Content AI Assistants |
Rating | 4.5/5 Capterra 4.5 · G2 4.4 234 reviews | 4.4/5 G2 4.4 37 reviews |
Free plan | Yes | No |
Choose Quillbot or Undetectable AI?
Choose Quillbot if
- You want a free tier before you commit
- You want excellent paraphrasing tool
- You want multiple rewriting modes
- You work in AI writing, not writing & content
Choose Undetectable AI if
- You want achieves high accuracy in detecting AI-generated content, including paraphrased text
- You want transforms AI-generated text to pass as human-written, reducing detection risk
- Budget matters ($5/mo, billed monthly vs $7.50/user/mo, billed monthly)
- You work in writing & content, not AI writing
In-Depth Analysis
Quillbot
Your complete AI writing solution for clear, confident, and professional communication.
Quillbot's pricing is quite generous, especially with a robust free tier offering essential tools.
Strengths
- Pro: Excellent paraphrasing tool
- Pro: Multiple rewriting modes
- Pro: Grammar checker included
- Pro: Offers paid tiers
- Pro: Good for academic writing
Weaknesses
- Con: Can make text sound unnatural
- Con: Limited AI writing features
- Con: Free version restrictive
- Con: Plagiarism concerns if misused
- Con: Less powerful than full AI writers
Key features
Undetectable AI
Make AI content undetectable and human-like
The pricing for Undetectable AI is fair, especially with the significant discounts for yearly subscriptions.
Strengths
- Pro: Achieves high accuracy in detecting AI-generated content, including paraphrased text.
- Pro: Transforms AI-generated text to pass as human-written, reducing detection risk.
- Pro: Offers a free tier for basic AI detection and paid plans for humanization and higher word counts.
- Pro: Provides business-specific tools like an SEO content writer and white-label options.
- Pro: Integrates into workflows with a Chrome Extension and Developer API.
Weaknesses
- Con: The effectiveness of humanization may vary depending on the complexity of the original AI-generated text.
- Con: Advanced features like humanization and higher word counts are part of paid plans.
Key features
Plans and prices: Quillbot vs Undetectable AI
| Tool | Plans and prices | Source |
|---|---|---|
| Quillbot |
| quillbot.com read Sep 29, 2026 |
| Undetectable AI |
| undetectable.ai/pricing read Oct 13, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Quillbot pricing and Undetectable AI pricing.
Key Takeaways
Quillbot
- Has a free plan
Undetectable AI
- Lower entry price: $5/mo, billed monthly vs $7.50/user/mo, billed monthly
What the data shows
On the data below, Quillbot leads on a free plan; Undetectable AI leads on lower entry price. We do not name an overall winner for this pair.
- User ratings are within 0.2 points (4.5/5 from 234 reviews for Quillbot, 4.4/5 from 37 reviews for Undetectable AI).
- Undetectable AI has the lower entry price: $5/mo, billed monthly (10K words/month (Yearly)) against $7.50/user/mo, billed monthly (Team) for Quillbot.
- Only Quillbot has a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Quillbot and Undetectable AI compare in 2026?
On the data below, Quillbot leads on a free plan; Undetectable AI leads on lower entry price. We do not name an overall winner for this pair. User ratings are within 0.2 points (4.5/5 from 234 reviews for Quillbot, 4.4/5 from 37 reviews for Undetectable AI). Undetectable AI has the lower entry price: $5/mo, billed monthly (10K words/month (Yearly)) against $7.50/user/mo, billed monthly (Team) for Quillbot. Only Quillbot has a free plan.
What are Quillbot and Undetectable AI used for?
Quillbot: Your complete AI writing solution for clear, confident, and professional communication. Undetectable AI: Make AI content undetectable and human-like.
What does Quillbot cost vs Undetectable AI?
Quillbot's cheapest paid plan is Team at $7.50/user/mo, billed monthly; it also has a free plan. Undetectable AI's cheapest paid plan is 10K words/month (Yearly) at $5/mo, billed monthly. Prices read on the vendors' pricing pages, latest check Oct 13, 2026.
What's the main difference between Quillbot and Undetectable AI?
Quillbot's main strength: excellent paraphrasing tool. Undetectable AI's main strength: achieves high accuracy in detecting AI-generated content, including paraphrased text.