AI Undetectable vs Keyword Insights
Both are in AI content tools. Here is how their plans, prices and features compare, taken from each vendor's own site.
The main differences
- AI Undetectable's cheapest paid plan is $5/mo, against $58/mo for Keyword Insights.
| AI Undetectable | Keyword Insights | |
|---|---|---|
| Starting price | from $5/mo | from $58/mo |
| Free plan | Not stated by the vendor | No |
| Free trial | Yes | Yes |
| Plans | 10K words ($9.99/mo, $5/mo annual, $60/yr); 20K words ($19/mo, $9.50/mo annual, $114/yr); 35K words ($31/mo, $15.75/mo annual, $189/yr) | Basic ($58/mo); Professional ($99/mo); Enterprise (Custom) |
| Fees and pricing notes | None stated | None stated |
| Best for | Creators | Not stated |
| Key features | AI text detector that estimates how machine-written a passage looks; Two rewrite modes: Basic and a deeper Stealth rebuild; Image detector for uploaded images or image links; Five writing modes: general, essays, articles, marketing copy and stories | Keyword clustering at 1 credit per keyword; Content briefs at 100 credits each; Writing Assistant at 200 credits per article; AI Writing Agent at 1,200 credits per article |
| Checked on | 2026-10-08 | 2026-10-04 |
Prices change; confirm on the vendor's site before you buy. Full details and sources are on each tool's page.
AI Undetectable
- 3-day free trial on every plan
- Yearly billing is about 50% cheaper
- Detector and rewriter in one workspace
Trade-offs
- No free plan, and the selected plan is billed after the trial unless cancelled
- Monthly word allowances do not roll over
- Detector scores are estimates, not proof of how a text was written
Keyword Insights
- $1 trial of all features for 7 days
- Pay-as-you-go available
- Annual billing saves 20%
Trade-offs
- Basic has 1 user seat and 10,000 credits
- A single AI-written article uses 1,200 credits
- Enterprise is custom