AI Undetectable vs Koala
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 $20/mo for Koala.
| AI Undetectable | Koala | |
|---|---|---|
| Starting price | from $5/mo | from $20/mo |
| Free plan | Not stated by the vendor | Not stated by the vendor |
| 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) | Starter ($25/mo, $20/mo annual); Professional ($49/mo, $39.20/mo annual); Boost ($99/mo, $79.20/mo annual); Growth ($179/mo, $143.20/mo annual); Elite ($350/mo, $280/mo annual) |
| 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 | KoalaWriter article generation; KoalaImages; Brand DNA for matching your voice; WordPress integration |
| Checked on | 2026-10-08 | 2026-10-05 |
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
Koala
- Free trial of 5,000 words and 25 credits with no card
- Yearly billing is 20% cheaper
- Plans scale from 1 brand to 75 brands
Trade-offs
- No permanent free plan
- Word counts are based on one model and other models count at 2 to 3 times
- Higher tiers climb quickly in price