Best AI Detection Software in 2026
Updated
30 AI detection software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
30ranked
1free plans on this page
$0.67/molowest paid tier
7 Oct 2026last checked
1 of the 5 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 26 | AI DetectWindows · Mac · Linux · Self-hosted | Two bars | — | 3 of 6 | Free | 4.9 | |
| 27 | Walter Writes AIWeb · Android · iPhone · API · Extension | One bar | — | — | 3 of 6 | $0.67/mo | 4.8 |
| 28 | ClassGuardWeb | No signal | — | — | 1 of 6 | — | 4.7 |
| 29 | Compilatio AI DetectorWeb · API | No signal | — | — | 1 of 6 | — | 4.7 |
| 30 | Turnitin AI Writing DetectionWeb | No signal | — | — | 1 of 6 | — | 4.7 |
Compare all 5 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Word limit | Language coverage |
|---|---|---|---|---|---|---|---|---|
| 26 | AI Detect | 4.9 | Free plan | Free | Yes | — | — | — |
| 27 | Walter Writes AI | 4.8 | No | $0.67/mo | No | — | 30,000 words | — |
| 28 | ClassGuard | 4.7 | No | — | No | — | — | — |
| 29 | Compilatio AI Detector | 4.7 | No | — | No | — | — | — |
| 30 | Turnitin AI Writing Detection | 4.7 | No | — | No | — | — | — |