Deckard review
An open-source AST tool for local clone analysis across Java and Solidity projects.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Deckard is an open-source command-line tool for detecting duplicated code and clone-related bugs in local source-code collections. It parses code into trees, generates vectors, groups and clusters those vectors, and produces HTML reports for clone and bug findings. The release package documents syntax support for C, Java, PHP and Solidity. Developers and researchers who prefer repository analysis on their own machines can run it across Windows, macOS and Linux.
Its strongest technical focus is the tree-based workflow. Parse-tree generation supports AST-oriented analysis, while vector generation, grouping and clustering provide the main path to clone detection. Batch clone-detection scripts suit repeatable command-line work, and partial-file vector generation allows analysis of selected file content. The package also includes clone-related bug detection and HTML output, giving teams a way to review findings beyond raw command-line results. These capabilities make Deckard particularly relevant to cross-platform experiments involving Java 7 or Solidity syntax.
Deckard is a local, self-hosted tool rather than a hosted development-platform service. Its category profile lists repository scanning, with no CI or IDE integration, so teams seeking automated pipeline checks or editor feedback should choose a tool built around those workflows instead. The verified language scope is also limited to four languages, which narrows its fit for polyglot codebases outside C, Java, PHP and Solidity. There are no commercial tiers to compare; its open-source release model suits developers and researchers who want command-line analysis without a hosted subscription. Pick Deckard for focused AST experiments and local clone research, not for integrated CI or IDE coverage.
Deckard pros and cons
- Where it wins
- Tree-based detection with parse trees and vector clustering
- Supports repository scans on Windows, macOS and Linux
- Generates HTML clone and bug reports with batch processing
- Where it doesn't
- Verified language support covers only four languages
- No CI integration for automated pipeline scanning
- No IDE integration for editor-based clone analysis
Deckard fact sheet, pricing and score →
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