Best Code Clone Detection Tools in 2026
Updated
In short: Algo VPN is ranked #1 of 23 as of 4 October 2026, ahead of Duplo and PMD. The best-ranked option with a free plan is Duplo.
Repeated or closely similar code can be difficult to track across a project. Clone detection tools help surface it for review, and this ranking begins with jscpd, PMD, and NiCad. Compare supported languages, scan scope, and clone detection method to assess what each can examine. CI and IDE integration indicate where a tool may fit into your development workflow; self-hosted availability is another practical consideration. The entries are also compared on free plans and paid-from pricing. Consider which languages and parts of your codebase you need to inspect, and whether you want to review findings through an IDE, a CI process, or another setup.
23 code clone detection tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Algo VPN iPhone + Android RecognisedPhone appDocumentedFree plan 7.0 Clone detection method: semanticScan scope: repository
- 2 Duplo No phone app RecognisedPhone appDocumentedFree plan 6.4Free Clone detection method: textScan scope: repositoryCI integration: Yes
- 3 PMD No phone app RecognisedPhone appDocumentedFree plan 6.4Free
- 4 dcd No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clone detection method: textScan scope: repositoryCI integration: Yes
- 5 jscpd No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clone detection method: tokenScan scope: repositoryCI integration: Yes
- 6 NiCad No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clone detection method: hybridScan scope: repository
- 7 Simian Similarity Analyzer No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clone detection method: textScan scope: repositoryCI integration: Yes
- 8 CloneWorks No phone app RecognisedPhone appDocumentedFree plan 6.2Free Clone detection method: tokenScan scope: repository
- 9 copydetect No phone app RecognisedPhone appDocumentedFree plan 5.9 Clone detection method: tokenScan scope: repositoryCI integration: No
- 10 Hound No phone app RecognisedPhone appDocumentedFree plan 5.8
- 11 @kongyo2/similarity-ts No phone app RecognisedPhone appDocumentedFree plan 5.3 Clone detection method: astScan scope: repositoryCI integration: Yes
- 12 Amimica No phone app RecognisedPhone appDocumentedFree plan 5.3 Clone detection method: hybridScan scope: repositoryCI integration: No
- 13 Deckard No phone app RecognisedPhone appDocumentedFree plan 5.3 Clone detection method: astScan scope: repositoryCI integration: No
- 14 phpcpd-next No phone app RecognisedPhone appDocumentedFree plan 5.3 Clone detection method: tokenScan scope: repositoryCI integration: Yes
- 15 QuickDup No phone app RecognisedPhone appDocumentedFree plan 5.3 Clone detection method: hybridScan scope: repositoryCI integration: Yes
- 16 art-dupl No phone app RecognisedPhone appDocumentedFree plan 5.2 Clone detection method: astScan scope: repositoryCI integration: Yes
- 17 CCFinderSW No phone app RecognisedPhone appDocumentedFree plan 5.2 Clone detection method: token
- 18 semdup No phone app RecognisedPhone appDocumentedFree plan 5.2 Clone detection method: semanticScan scope: repositoryCI integration: Yes
- 19 SourcererCC No phone app RecognisedPhone appDocumentedFree plan 5.2 Clone detection method: tokenScan scope: repository
- 20 CodeMatch No phone app RecognisedPhone appDocumentedFree plan 5.1 Clone detection method: hybridScan scope: repository
- 21 CopyPaste No phone app RecognisedPhone appDocumentedFree plan 4.9
- 22 dskDitto No phone app RecognisedPhone appDocumentedFree plan 4.9
- 23 DUDE (DUplicates DEtector) No phone app RecognisedPhone appDocumentedFree plan 4.9
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which code clone detection tool is ranked first on Samsung Mobile US Press?
Algo VPN is ranked #1 of 23 with a score of 7.0. Duplo is second and PMD third.
How many of these have a free plan?
7 of the 23 on this page publish a free plan on their own pricing pages.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.