Best Duplo Alternatives in 2026
The top Duplo alternatives are jscpd, art-dupl and PMD: 15 code clone detection tools our editors would look at instead of Duplo, in our ranking order.
Duplo: A focused, free CLI scanner for finding duplicated source blocks across repositories. Where it falls short: its documented workflow is command-line based rather than visual..
Switching from Duplo? For most code clone detection tools buyers the best Duplo alternative is jscpd, built for broad, CI-driven multi-format clone detection. CodeMatch offers the most supported languages (54 languages).
Why People Look for a Duplo Alternative
- Its documented workflow is command-line based rather than visual
- Text-based matching provides less detection depth than higher-ranked tools
- Automation centers on GitHub Actions rather than a broad integration set
Quick Picks by What You Need
- Best overalljscpd9.4
Broad, CI-driven multi-format clone detection
Visit jscpd - Best free optionjscpd9.4
Has a free plan
Visit jscpd - Most supported languagesCodeMatch8.0
54 languages
Visit CodeMatch
All 15 Duplo Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forBroad, CI-driven multi-format clone detection
- Better than Duplo:
- Editor score 9.4 vs 8.2
A broad, self-hosted clone detector with strong CI, reporting, and history analysis.
- CI integration
- Self-hosted option
9.4/10★★★★★Visit jscpd -
Best forGo teams needing deep CI clone analysis
- Better than Duplo:
- Editor score 9.2 vs 8.2
A focused, self-hosted clone analyzer for Go teams building duplication checks into CI.
- CI integration
- Self-hosted option
9.2/10★★★★★Visit art-dupl -
Best forTeams wanting clones plus broad static analysis
- Better than Duplo:
- Editor score 9.0 vs 8.2
A strong open-source choice for teams pairing clone detection with broad static analysis.
9.0/10★★★★☆Visit PMD -
Best forResearch-grade configurable clone detection
- Better than Duplo:
- Editor score 8.8 vs 8.2
A configurable, self-hosted choice for exact and near-miss clone analysis.
- Self-hosted option
8.8/10★★★★☆Visit NiCad -
Best forOpen-source hybrid detection with developer tooling
- Better than Duplo:
- Editor score 8.7 vs 8.2
An open-source hybrid detector for finding exact, renamed, near-duplicate, and recurring code.
- Self-hosted option
8.7/10★★★★☆Visit Amimica -
Best forTypeScript repositories needing CI clone gates
- Better than Duplo:
- Editor score 8.6 vs 8.2
A focused, self-hosted CLI for TypeScript clone checks and CI gates.
- CI integration
- Self-hosted option
8.6/10★★★★☆Visit kongyo2 -
Best forTeams reviewing clones in GitHub pull requests
- Better than Duplo:
- Editor score 8.5 vs 8.2
An open-source candidate finder for reviewing likely code duplicates in pull requests.
- CI integration
- Self-hosted option
8.5/10★★★★☆Visit QuickDup -
Best forSemantic duplicate detection with local inference
- Better than Duplo:
- Editor score 8.4 vs 8.2
A self-hosted semantic clone detector with repository diff and CI support.
- CI integration
- Self-hosted option
8.4/10★★★★☆Visit semdup -
Best forMature language-agnostic pipeline scanning
- Better than Duplo:
- Editor score 8.3 vs 8.2
A mature, configurable CLI scanner for repository-wide duplicate-code analysis.
- CI integration
- Self-hosted option
8.3/10★★★★☆Visit Simian -
Best forPHP projects needing CI-ready clone reports
A focused open-source choice for PHP teams that need detailed clone reports in CI.
- CI integration
- Self-hosted option
8.1/10★★★★☆Visit phpcpd-next -
Best forLarge multi-language commercial comparisons
A focused investigation tool for ranking code similarities across large, multi-language repositories.
8.0/10★★★★☆Visit CodeMatch -
Best forLightweight fuzzy duplicate checks in CI
A focused, self-hosted option for fuzzy duplicate checks in CI.
- CI integration
- Self-hosted option
7.9/10★★★★☆Visit dcd -
Best forSelf-hosted repository search with editor access
A free, editor-connected repository search engine with broad source-control support.
7.8/10★★★★☆Visit Hound -
Best forLarge-scale configurable token-based scans
A configurable, self-hosted token-based detector for repository-scale clone analysis.
- Self-hosted option
7.7/10★★★★☆Visit CloneWorks -
Best forWindows users needing token clone reports
A focused open-source Java CLI for token-based clone reports on Windows.
- Self-hosted option
7.6/10★★★★☆Visit CCFinderSW
Duplo Alternatives: Common Questions
What is the best alternative to Duplo?
jscpd: #1 in our Code Clone Detection Tools ranking, with an editor score of 9.4 out of 10. A broad, self-hosted clone detector with strong CI, reporting, and history analysis.
Is there a free alternative to Duplo?
Yes. jscpd, art-dupl, PMD, NiCad and Amimica have a free plan or a free tier (14 of the 15 alternatives on this page).
Why do people look for Duplo alternatives?
Its documented workflow is command-line based rather than visual; Text-based matching provides less detection depth than higher-ranked tools; Automation centers on GitHub Actions rather than a broad integration set.
Which Duplo alternative has the most supported languages?
CodeMatch, with 54 languages.
How do I switch from Duplo?
Export your data from Duplo (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Duplo.
How to Switch from Duplo
- Export your data from Duplo (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Duplo.
Duplo vs Each Alternative
| # | Tool | Free plan | Paid from | Clone detection method | Scan scope | CI integration | Self-hosted option | Score |
|---|---|---|---|---|---|---|---|---|
| 10 | Duplo | Yes | Free | Text | Repository | Yes | Yes | 8.2 |
| 1 | jscpd | Free | Token | Repository | Yes | Yes | 9.4 | |
| 2 | art-dupl | Free | Ast | Repository | Yes | Yes | 9.2 | |
| 3 | PMD | Yes | Free | 9.0 | ||||
| 4 | NiCad | Yes | Free | Hybrid | Repository | Yes | 8.8 | |
| 5 | Amimica | Yes | Free | Hybrid | Repository | No | Yes | 8.7 |
| 6 | @kongyo2/similarity-ts | Yes | Free | Ast | Repository | Yes | Yes | 8.6 |
| 7 | QuickDup | Free | Hybrid | Repository | Yes | Yes | 8.5 | |
| 8 | semdup | Free | Semantic | Repository | Yes | Yes | 8.4 | |
| 9 | Simian Similarity Analyzer | Free | Text | Repository | Yes | Yes | 8.3 | |
| 10 | phpcpd-next | Free | Token | Repository | Yes | Yes | 8.1 | |
| 11 | CodeMatch | No | Hybrid | Repository | 8.0 | |||
| 12 | dcd | Yes | Free | Text | Repository | Yes | Yes | 7.9 |
| 13 | Hound | Yes | Free | 7.8 | ||||
| 14 | CloneWorks | Yes | Free | Token | Repository | Yes | 7.7 | |
| 15 | CCFinderSW | Free | Token | Yes | 7.6 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update