$9.99/mo for the entry tier; higher tiers scale by word volume.
| Plan detail | Value |
|---|---|
| Starting price | $9.99/mo |
| Free tier | 250 words (recurring) |
| Estimated annual cost at entry tier | $120/yr |
| Bundled AI detector | Included |
Is Undetectable AI worth the price?
Undetectable AI is priced below the category average of roughly $12/month. Teams that want one tool to both check and rewrite content across multiple AI models.
Frequently cited as a top-tier performer against GPTZero and Originality.ai, though results vary by source text length and topic.
How to reduce your cost
- Use the 250-word free tier for occasional short passages before committing to a subscription.
- Annual billing typically discounts the monthly rate by 20–40% across this category — check Undetectable AI's pricing page for the current annual rate.
- Skip a separate detector subscription since one is bundled in.
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How Undetectable AI compares on price
| Tool | Starting price | Free tier |
|---|---|---|
| WriteBros.ai | $1.99/mo | 0 words |
| HideMyAI | $6.99/mo | 150 words |
| AI Natural Write | $7.99/mo | 400 words |
| WriteHuman AI | $8/mo | 100 words |
| QuillBot Humanizer | $8.33/mo | 125 words |
| Walter Writes AI | $9/mo | 200 words |
| Litero AI Humanizer | $9.95/mo | 250 words |
| Undetectable AI | $9.99/mo | 250 words |