Specifiction
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your tool
Vendor dashboard

Best Noplag Engine Alternatives in 2026

Updated

20 tools from plagiarism detection software ranked against Noplag Engine on the same published basis.

  1. 1
    Noplag Free plan apiLinuxMacself-hostedWeb $9.99/mo7.8
    Noplag Engine vs Noplag
  2. 3
    GPTZero Free plan apiextensionWeb $8.33/mo7.4
    Noplag Engine vs GPTZero
  3. 4
    Plagium Free plan AndroidiOSWeb Free7.3
    Noplag Engine vs Plagium
  4. 5
    Winston AI Free plan apiextensionWeb $5/mo7.3
    Noplag Engine vs Winston AI
  5. 6
    Codequiry Free trial apiLinuxMacWebWin €25.76/mo7.2
    Noplag Engine vs Codequiry
  6. 7
    Pangram Free plan apiextensionWeb $1.67/mo7.2
    Noplag Engine vs Pangram
  7. 8
    Plagius Free trial MacWebWin $4.90/mo7.2
    Noplag Engine vs Plagius
  8. 9
    Copyleaks AI Detector Free trial apiextensionWeb $1.17/mo7.0
    Noplag Engine vs Copyleaks AI Detector
  9. 10
    JPlag Free plan apiLinuxMacself-hostedWin Free7.0
    Noplag Engine vs JPlag
  10. 11
    Dolos Free plan apiLinuxself-hostedWebWin Free6.9
    Noplag Engine vs Dolos
  11. 12
    Originality.ai Free plan apiextensionWeb $12.95/mo6.9
    Noplag Engine vs Originality.ai
  12. 13
    Plagiarisma Free plan WebWin Free6.9
    Noplag Engine vs Plagiarisma
  13. 14
    SmallSEOTools Plagiarism Checker Free plan apiextensionWeb $7.84/mo6.9
    Noplag Engine vs SmallSEOTools Plagiarism Checker
  14. 15
    Quetext AI Detector Free plan apiextensionWeb $7.99/mo6.8
    Noplag Engine vs Quetext AI Detector
  15. 16
    PlagiarismCheck.org apiextensionWeb 6.5
    Noplag Engine vs PlagiarismCheck.org
  16. 17
    DupliChecker apiWeb $9.99/mo6.4
    Noplag Engine vs DupliChecker
  17. 18
    Scribbr Plagiarism Checker Web 6.4
    Noplag Engine vs Scribbr Plagiarism Checker
  18. 19
    Turnitin Originality Web 6.4
    Noplag Engine vs Turnitin Originality
  19. 20
    WINNOWR apiLinuxself-hostedWeb 6.4
    Noplag Engine vs WINNOWR
  20. 21
    Codeleaks apiself-hostedWeb 6.3
    Noplag Engine vs Codeleaks

Noplag Engine alternatives compared

#ToolScoreFree planFromRuns on
1Noplag7.8Free plan$9.99/moAPI, Linux, Mac, self-hosted, Web, Windows
3GPTZero7.4Free plan$8.33/moAPI, Browser, Web
4Plagium7.3Free planFreeAndroid, iOS, Web
5Winston AI7.3Free plan$5/moAPI, Browser, Web
6Codequiry7.2No€25.76/moAPI, Linux, Mac, Web, Windows
7Pangram7.2Free plan$1.67/moAPI, Browser, Web
8Plagius7.2No$4.90/moMac, Web, Windows
9Copyleaks AI Detector7.0No$1.17/moAPI, Browser, Web
10JPlag7.0Free planFreeAPI, Linux, Mac, self-hosted, Windows
11Dolos6.9Free planFreeAPI, Linux, self-hosted, Web, Windows
12Originality.ai6.9Free plan$12.95/moAPI, Browser, Web
13Plagiarisma6.9Free planFreeWeb, Windows
14SmallSEOTools Plagiarism Checker6.9Free plan$7.84/moAPI, Browser, Web
15Quetext AI Detector6.8Free plan$7.99/moAPI, Browser, Web
16PlagiarismCheck.org6.5No—API, Browser, Web
17DupliChecker6.4No$9.99/moAPI, Web
18Scribbr Plagiarism Checker6.4No—Web
19Turnitin Originality6.4No—Web
20WINNOWR6.4No—API, Linux, self-hosted, Web
21Codeleaks6.3No—API, self-hosted, Web
Make your tool an alternative to Noplag Engine

The sponsored alternative slot on this page is labelled Sponsored.

See the price

Questions about Noplag Engine alternatives

What is the best alternative to Noplag Engine?

Noplag, number 1 in plagiarism detection software with a score of 7.8 out of 10. The others here: GPTZero, Plagium, Winston AI and 16 more.

What is the best free alternative to Noplag Engine?

Noplag is the best-ranked alternative with a free plan. 11 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives 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.