Best AI Detection Software in 2026
Updated
In short: Sapling is ranked #1 of 30 as of 4 October 2026, ahead of GPTZero and Polygraf AI Detector. The best-ranked option with a free plan is GPTZero. The lowest first paid tier on this page is ScribeLens at $0.04/mo.
AI detection tools are used to evaluate text for possible AI generation. Compared on language coverage and word limit, the entries also specify access routes and outputs such as API access, browser extensions and report export. Free-plan availability, included team seats and paid starting prices help outline the available terms. Pangram and TraceGPT lead the shown entries, with Originality.ai and Winston AI following. Consider the languages and volume of text you need to assess, and whether your workflow calls for team access, an API connection or downloadable reports.
30 AI detection software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
30ranked
15free plans on this page
$0.04/molowest paid tier
4 Oct 2026last checked
Input list AI Detection Software 25 channels on this page · 79 of 200 spec lines stated by the makers
Ch Tool Free planPaid fromWord limitLanguage coverageAPI accessBrowser extensionReport exportIncluded team seats Spec sheet Score
01 Sapling Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessnot statedBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 2/8spec lines stated 7.5
02 GPTZero Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 7.4
03 Polygraf AI Detector Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 7.3
04 Trinka Free planYesPaid from$20/moWord limitnot statedLanguage coveragenot statedAPI accessnot statedBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 7.3
05 Winston AI Free planNoPaid from$10/moWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 4/8spec lines stated 7.2
06 Grammarly Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessnot statedBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 2/8spec lines stated 7.1
07 Pangram Free planYesPaid from$20/moWord limit300,000 wordsLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 5/8spec lines stated 7.1
08 UncovAI AI Detector Extension Free planYesPaid fromnot statedWord limitnot statedLanguage coverageenglish onlyAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 4/8spec lines stated 7.1
09 ZeroTrue Free planYesPaid fromnot statedWord limitnot statedLanguage coveragemultilingualAPI accessYesBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 7.1
10 IA Checker Free planYesPaid fromnot statedWord limit300,000 wordsLanguage coveragemultilingualAPI accessYesBrowser extensionnot statedReport exportpdfIncluded team seatsnot stated 5/8spec lines stated 7.0
11 TraceGPT Free planYesPaid fromnot statedWord limitnot statedLanguage coveragemultilingualAPI accessYesBrowser extensionYesReport exportpdfIncluded team seatsnot stated 5/8spec lines stated 7.0
12 Copyleaks AI Detector Free plannot statedPaid fromnot statedWord limit300,000 wordsLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 6.9
13 Heynotai Free planYesPaid from$8/moWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportpdfIncluded team seatsnot stated 5/8spec lines stated 6.9
14 ScribeLens Free planYesPaid from$9/moWord limit300,000 wordsLanguage coveragenot statedAPI accessYesBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 4/8spec lines stated 6.9
15 Undetectable AI Free planYesPaid from$9.99/moWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 4/8spec lines stated 6.9
16 Originality.ai Free planYesPaid from$12.95/moWord limit10,000 wordsLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 5/8spec lines stated 6.8
17 AI Detector Pro Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 2/8spec lines stated 6.3
18 EyeSift Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessnot statedBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 1/8spec lines stated 6.1
19 Walter Writes AI Free planNoPaid fromnot statedWord limit30,000 wordsLanguage coveragenot statedAPI accessYesBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 5.7
20 Smodin AI Detector Free plannot statedPaid from$10/moWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionYesReport exportnot statedIncluded team seatsnot stated 3/8spec lines stated 5.6
21 ClassGuard Free planNoPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessnot statedBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 1/8spec lines stated 5.5
22 Is It AI? Free planYesPaid fromnot statedWord limitnot statedLanguage coverageenglish onlyAPI accessnot statedBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 2/8spec lines stated 5.5
23 SlopProx Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessnot statedBrowser extensionYesReport exportnot statedIncluded team seats1 seats 3/8spec lines stated 5.5
24 Airno Free planYesPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 2/8spec lines stated 5.4
25 Compilatio AI Detector Free planNoPaid fromnot statedWord limitnot statedLanguage coveragenot statedAPI accessYesBrowser extensionnot statedReport exportnot statedIncluded team seatsnot stated 2/8spec lines stated 5.4
Compare all 25 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | Word limit | Language coverage |
|---|---|---|---|---|---|---|---|---|
| 1 | Sapling | 7.5 | Free plan | $5/mo | Yes | — | — | — |
| 2 | GPTZero | 7.4 | Free plan | $8.33/mo | Yes | — | — | — |
| 3 | Polygraf AI Detector | 7.3 | Free plan | $9.95/mo | Yes | — | — | — |
| 4 | Trinka | 7.3 | Free plan | — | Yes | 20 /mo | — | — |
| 5 | Winston AI | 7.2 | Free plan | $5/mo | No | 10 /mo | — | — |
| 6 | Grammarly | 7.1 | Free plan | $12/mo | Yes | — | — | — |
| 7 | Pangram | 7.1 | Free plan | $1.67/mo | Yes | 20 /mo | 300,000 words | — |
| 8 | UncovAI AI Detector Extension | 7.1 | Free plan | €9.99/mo | Yes | — | — | english_only |
| 9 | ZeroTrue | 7.1 | Free plan | Free | Yes | — | — | multilingual |
| 10 | IA Checker | 7.0 | Free plan | €9.90/mo | Yes | — | 300,000 words | multilingual |
| 11 | TraceGPT | 7.0 | No | — | Yes | — | — | multilingual |
| 12 | Copyleaks AI Detector | 6.9 | No | $1.17/mo | — | — | 300,000 words | — |
| 13 | Heynotai | 6.9 | Free plan | $8/mo | Yes | 8 /mo | — | — |
| 14 | ScribeLens | 6.9 | Free plan | $0.04/mo | Yes | 9 /mo | 300,000 words | — |
| 15 | Undetectable AI | 6.9 | No | $0.42/mo | Yes | 9.99 /mo | — | — |
| 16 | Originality.ai | 6.8 | Free plan | $12.95/mo | Yes | 12.95 /mo | 10,000 words | — |
| 17 | AI Detector Pro | 6.3 | Free plan | Free | Yes | — | — | — |
| 18 | EyeSift | 6.1 | Free plan | Free | Yes | — | — | — |
| 19 | Walter Writes AI | 5.7 | No | — | No | — | 30,000 words | — |
| 20 | Smodin AI Detector | 5.6 | No | — | — | 10 /mo | — | — |
| 21 | ClassGuard | 5.5 | No | — | No | — | — | — |
| 22 | Is It AI? | 5.5 | No | — | Yes | — | — | english_only |
| 23 | SlopProx | 5.5 | No | — | Yes | — | — | — |
| 24 | Airno | 5.4 | No | — | Yes | — | — | — |
| 25 | Compilatio AI Detector | 5.4 | No | — | No | — | — | — |
Is your tool on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI detection software is ranked first on Specifiction?
Sapling is ranked #1 of 30 with a score of 7.5. GPTZero is second and Polygraf AI Detector third.
How many of these have a free plan?
15 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, ScribeLens has the lowest first paid tier we found: $0.04/mo.
How is this list ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.