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Best Opal Alternatives in 2026

12 apps from code transpilers ranked against Opal on the same published basis.

  1. 1
    SWC Free plan AndroidapiLinuxMacWeb Free9.6
    Opal vs SWC
  2. 2
    Babel Free plan apiLinuxMacWebWin Free8.2
    Opal vs Babel
  3. 3
    Kotlin/JS Free plan LinuxMacWebWin Free8.0
    Opal vs Kotlin/JS
  4. 4
    Cython Free plan LinuxMacWin Free7.9
    Opal vs Cython
  5. 5
    Google Web Toolkit Free plan extensionLinuxMacWebWin Free7.8
    Opal vs Google Web Toolkit
  6. 6
    ClojureScript Free plan LinuxMacself-hostedWebWin Free7.6
    Opal vs ClojureScript
  7. 7
    Transcrypt Free plan LinuxMacself-hostedWebWin Free7.3
    Opal vs Transcrypt
  8. 8
    TeaVM 6.8
    Opal vs TeaVM
  9. 9
    Fable Web 6.8
    Opal vs Fable
  10. 10
    CoffeeScript apiLinuxMacWebWin 6.6
    Opal vs CoffeeScript
  11. 11
    Scala.js 6.5
    Opal vs Scala.js
  12. 12
    Vala Free plan LinuxMacWin Free6.5
    Opal vs Vala
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