Instead of Plagium
Plagium alternatives
Plagium compares submitted text with public, private, proprietary and third-party sources, then links reported similarities to original material. It also offers a separate AI Detector, Deep Search for Word, PDF and text uploads, Google Drive and Google Docs tools, and business integrations. Its free account costs nothing and permits five daily searches of up to 4,000 characters, but excludes Deep Search and API access.
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Noplag
Free plan Open source APILinuxMac+3Open-web text matching with file and URL inputs — Noplag adds live-web matching across academic indexes and user folders, with linked matches, scores and PDF reports.
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Noplag Engine
Free plan APILinuxMac+3Local-corpus matching with controllable ingestion — Noplag Engine searches a local corpus you control, unlike Plagium's comparisons with public, private, proprietary and third-party sources.
Free plan · 14-day trial Visit site - 3
Dolos
Free plan Open source APILinuxMac+3Comparing source-code submissions — Dolos compares source-code submissions and reports overlap, while Plagium analyzes textual similarity and AI-writing patterns.
Free plan Visit site - 4
JPlag
Free plan Open source APILinuxMac+3Private, local source-code comparison — JPlag analyzes program syntax and structure on your machine, comparing submissions with one another rather than searching the internet.
Free plan Visit site - 5
Copyscape
Free plan APISelf-hostedWebWeb-content duplication and automated checks — Copyscape checks URLs for online duplicate content and adds Premium batch search, a private index and an automation API.
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GPTZero
Free plan APIExtensionWebAI-writing detection and browser workflows — GPTZero emphasizes AI-text detection with sentence-level highlights and a Chrome extension, while Plagium focuses on textual similarity and has a separate AI Detector.
Free plan · 14-day trial Visit site - 7
MOSS
Free plan LinuxWebNon-commercial code similarity review — MOSS compares programs and highlights matching passages, while Plagium checks text and AI-writing patterns across sources.
Free plan Visit site - 8
Check-Plagiarism
Free plan AndroidAPIWeb - 9
Copyleaks AI Detector
Free plan APIExtensionSelf-hosted+17.6 Visit site - 10
Plagiarisma
Free plan AndroidAPIExtension+2 - 11
DupliChecker
Free plan APIWeb - 12
PlagiarismCheck.org
Free plan APIExtensionWeb - 13
PlagiarismDetector.net
Free plan APIExtensionWeb - 14
PrePostSEO Plagiarism Checker
Free plan AndroidAPIiPhone+3 - 15
PlagAware
Free plan APIWeb - 16
PlagiarismSearch
Free plan APIExtensionWeb - 17
Plagiarism Checker X
Free plan Windows - 18
SmallSEOTools Plagiarism Checker
Free plan APIExtensionWeb - 19
Proofademic
Free plan APIWeb - 20
Scribbr Plagiarism Checker
Free plan Web - 21
SearchEngineReports Plagiarism Checker
Free plan Web - 22
Viper
Free plan Web - 23
DrillBit
Paid AndroidAPIiPhone+1 - 24
Plagius
Free trial MacWebWindows - 25
StrikePlagiarism
Free trial APISelf-hostedWeb - 26
iThenticate
Paid APIWeb - 27
PlagPointer
Paid Web - 28
Turnitin Similarity
Paid APIWeb - 29
Turnitin Originality
Paid Web
A replacement may suit you better if you check source code, need to search a corpus you control, or want web-page duplication checks or AI-writing analysis in a browser workflow. Plagium runs on Android, iOS and the web, but its automated reports are estimates, and its searches may miss unpublished, private or non-indexed content. When comparing alternatives, consider the content type, source coverage, privacy needs, input formats and integrations you require. Also weigh free-use limits and whether an API, local processing or a browser extension matters to your workflow.