jscpd vs JPlag

jscpd8.8Visit JPlag6.7Visit

Higher score jscpd #1 in Code Duplication Detection Tools 8.8/10 Open source ✓ 1 of 4 features Visit jscpd

vs

JPlag #6 in Code Duplication Detection Tools 6.7/10 Free plan Free plan✓ 2 of 4 features Visit JPlag

• jscpd fits best

  Teams needing broad, CI-ready clone analysis

• JPlag fits best

  Academic or multi-language similarity analysis

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Side by side

Feature	jscpd 8.8/10 Visit ↗	JPlag 6.7/10 Visit ↗
At a glance
Editor score	8.8	6.7
Ranking	#1 in Code Duplication Detection Tools	#6 in Code Duplication Detection Tools
Best for	Teams needing broad, CI-ready clone analysis	Academic or multi-language similarity analysis
Pricing model	Free	Free
Starting price	Open source	Free plan
Free plan	Not checked yet	✓ (best)
Free trial	—	—
Deployment	Self-hosted	Self-hosted
Platforms	Windows, macOS, Linux	Windows, macOS, Linux
Support	Docs	Community
Integrations	3 integrations	1 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features jscpd 1/4 · JPlag 2/4
Near-duplicate detection	Not checked yet	✓ (best)
Duplication gates	Not checked yet	—
Trend visualisation	Not checked yet	—
Open-source option	✓	✓
Specs
Supported languages	Not checked yet	20
CI/PR reporting	Not checked yet	None
Our review
Pros	Finds exact, renamed, and near-miss clones across 224 formats Runs in CI through GitHub Actions or Docker, with SARIF output Adds duplication trends, dead-code checks, and complexity analysis	Syntax-aware matching across 20 supported languages Handles some obfuscation and code modifications Free, open source, with CLI and Java API access
Cons	Command-line workflow may not suit teams seeking a hosted interface Configuration and report review are managed by the team Documentation is the listed support channel	Focused on pairwise analysis rather than duplication gates No CI pull-request reporting or trend visualisation Self-hosted setup relies on community support
Our verdict	jscpd is an open-source command-line tool that scans repositories for duplicated source-code blocks. It tokenizes files according to language-specific syntax to detect exact, renamed, and near-miss clones, making it relevant to developers… Read the review →	JPlag is a free, open-source tool that compares programs pairwise to identify source-code similarity. It is primarily suited to programming education, where instructors review student submissions, and it can also help examine duplicated… Read the review →

Strengths and trade-offs

• jscpd — where it wins

  • Finds exact, renamed, and near-miss clones across 224 formats
  • Runs in CI through GitHub Actions or Docker, with SARIF output
  • Adds duplication trends, dead-code checks, and complexity analysis

  Where it doesn't

  • Command-line workflow may not suit teams seeking a hosted interface
  • Configuration and report review are managed by the team
  • Documentation is the listed support channel

• JPlag — where it wins

  • Syntax-aware matching across 20 supported languages
  • Handles some obfuscation and code modifications
  • Free, open source, with CLI and Java API access

  Where it doesn't

  • Focused on pairwise analysis rather than duplication gates
  • No CI pull-request reporting or trend visualisation
  • Self-hosted setup relies on community support

• jscpd8.8/10 · Open source

  A self-hosted, open-source clone analyzer with broad format support and CI reporting.

  Visit jscpdFull verdict →
• JPlag6.7/10 · Free plan

  A free, syntax-aware tool for pairwise program-similarity analysis across 20 languages.

  Visit JPlagFull verdict →