Best Code Clone Detection Tools in 2026
Updated
In short: Duplo is ranked #1 of 23 as of 4 October 2026, ahead of PMD and Simian Similarity Analyzer. The best-ranked option with a free plan is PMD.
Code clone detection tools help developers locate repeated or closely similar code in a software project. The entries are ranked, with jscpd and PMD among the first options. Compared on supported languages, scan scope, and clone detection method, they give you ways to assess whether a tool matches the code you need to inspect. CI and IDE integration indicate where results can fit into a development workflow; a self-hosted option, free plan, and paid-from price add practical considerations. Compare these details against your project’s languages and preferred review process to narrow down suitable tools.
23 code clone detection tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Duplo Top pick · 7.3 Free plan · Free
#2 PMD Runner-up · 7.3 Free plan · Free
#3 Simian Similarity Analyzer Also great · 7.3 Free plan · Free
- Free plan LinuxmacOSWindows
- Free plan
- Yes
- Clone detection method
- text
- Scan scope
- repository
- CI integration
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan LinuxmacOSself-hostedWindows
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trialFree About PMDVisit site - Free plan LinuxmacOSWindows
- Clone detection method
- text
- Scan scope
- repository
- CI integration
- Yes
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Clone detection method
- token
- Scan scope
- repository
RecognisedDocumentedPlatformsFree planFree trial - Free plan apiLinuxmacOSself-hostedWindows
- Clone detection method
- token
- Scan scope
- repository
- CI integration
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan LinuxmacOS
- Free plan
- Yes
- Clone detection method
- text
- Scan scope
- repository
- CI integration
- Yes
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trialFree About dcdVisit site - Free plan LinuxmacOSself-hostedWindows
- Free plan
- Yes
- Clone detection method
- hybrid
- Scan scope
- repository
RecognisedDocumentedPlatformsFree planFree trial - apiLinuxmacOSself-hostedWindows
- Free plan
- Yes
- Clone detection method
- token
- Scan scope
- repository
- CI integration
- No
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial - apiLinuxmacOSself-hostedWeb
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - AndroidiOSLinuxmacOSWindows
- Clone detection method
- semantic
- Scan scope
- repository
RecognisedDocumentedPlatformsFree planFree trial - WindowsmacOSLinux
- Clone detection method
- ast
- Scan scope
- repository
- CI integration
- No
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial - LinuxmacOSWindows
- Clone detection method
- hybrid
- Scan scope
- repository
- CI integration
- Yes
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial -
- Free plan
- Yes
- Clone detection method
- ast
- Scan scope
- repository
- CI integration
- Yes
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial -
- Free plan
- Yes
- Clone detection method
- hybrid
- Scan scope
- repository
- CI integration
- No
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial -
- Clone detection method
- token
- Scan scope
- repository
- CI integration
- Yes
- IDE integration
- No
RecognisedDocumentedPlatformsFree planFree trial - Windows
- Clone detection method
- token
RecognisedDocumentedPlatformsFree planFree trial -
- Clone detection method
- ast
- Scan scope
- repository
- CI integration
- Yes
RecognisedDocumentedPlatformsFree planFree trial -
- Free plan
- No
- Clone detection method
- hybrid
- Scan scope
- repository
RecognisedDocumentedPlatformsFree planFree trial -
- Clone detection method
- semantic
- Scan scope
- repository
- CI integration
- Yes
RecognisedDocumentedPlatformsFree planFree trial - WindowsmacOS
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - macOSLinux
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - WindowsLinux
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial -
- Clone detection method
- token
- Scan scope
- repository
RecognisedDocumentedPlatformsFree planFree trial
Is your tool 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 Specifiction?
Duplo is ranked #1 of 23 with a score of 7.3. PMD is second and Simian Similarity Analyzer 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 on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.