Instead of Dolos
Dolos alternatives
Dolos is aimed at teachers comparing programming submissions, including tests, exams and exercises where small-group collaboration is allowed. It tokenizes source files, fingerprints sequences and reports similarity, total overlap and the longest matching fragment between file pairs. Its parsers cover common programming languages, while the web app accepts ZIP uploads and can detect languages from file extensions. A JSON API supports automated integrations, and analyses can also run locally or on a self-hosted server. The service is free and open source.
- 1
Noplag
Free plan Open source APILinuxMac+3Document checks against web and academic sources — Noplag checks documents against web, academic and user-provided sources, while Dolos compares source-code submissions.
- 2
Plagiarism Detector
Free plan WebWindowsDocument originality and AI-content checks — Plagiarism Detector checks documents for plagiarism and AI-generated content, while Dolos focuses on source-code similarity.
- 3
Copyscape
Free plan APISelf-hostedWebWeb-content duplication checks and API workflows — Copyscape checks web content and duplicate text online, while Dolos compares source-code submissions without web matching.
- 4
Crossref Similarity Check
Paid APIWebCrossref members checking scholarly manuscripts — Crossref Similarity Check compares manuscripts with scholarly and web content, while Dolos compares programming submissions.
- 5
MOSS
Free plan LinuxWebFree code-similarity checks with shared-code exclusions — MOSS measures program similarity and can exclude expected shared code; Dolos also reports overlap and fragment lengths.
- 6
Originality.ai
Free plan APIExtensionWebAI and plagiarism checks for web and submitted content — Originality.ai combines AI detection, plagiarism and content tools, while Dolos specializes in source-code similarity.
- 7
PlagAware
Free plan APIWebInstitutional plagiarism search with AI detection — PlagAware searches online documents and comparative texts and detects AI-style language, unlike Dolos's code-focused analysis.
- 8
Copyleaks AI Detector
Free plan APIExtensionSelf-hosted+17.7 Visit site - 9
JPlag
Free plan APILinuxSelf-hosted - 10
Plagiarisma
Free plan AndroidAPIExtension+2 - 11
DupliChecker
Free plan APIWeb - 12
PlagiarismCheck.org
Free plan APIExtensionWeb - 13
PlagiarismSearch
Free plan APIExtensionWeb - 14
PrePostSEO Plagiarism Checker
Free plan AndroidAPIiPhone+3 - 15
Smodin Plagiarism Checker
Free plan AndroidAPIExtension+2 - 16
Plag
Free plan Web - 17
Plagiarism Checker X
Free plan Windows - 18
Quetext AI Detector
Free plan APIExtensionWeb - 19
SmallSEOTools Plagiarism Checker
Free plan APIExtensionWeb - 20
Plagramme
Free plan Web - 21
Scribbr Plagiarism Checker
Free plan Web - 22
Viper
Free plan Web - 23
DrillBit
Paid AndroidAPIiPhone+1 - 24
Plagius
Free trial MacWebWindows
Its focus is source code rather than documents: Dolos does not match against web or academic sources, and the public API caps ZIP submissions at 10 MB. Mixed-language ZIPs are analyzed in their dominant language unless a language is selected, and reports export as CSV. Alternatives differ in whether they check documents, web pages or academic material, support local or institutional workflows, and provide other report formats. Consider the input types, comparison sources, privacy and hosting needs, plus any paid-plan costs, before switching from Dolos.