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Best Elm Reactor Alternatives in 2026

Updated

20 platforms from coding playgrounds ranked against Elm Reactor on the same published basis.

  1. 1
    Playcode Free plan AndroidiOSLinuxMacWeb $25/mo9.3
    Elm Reactor vs Playcode
  2. 2
    Replit Free plan AndroidiOSLinuxMacWeb $18/mo9.2
    Elm Reactor vs Replit
  3. 3
    Coder Free plan apiLinuxMacself-hostedWeb Free9.1
    Elm Reactor vs Coder
  4. 4
    Deepnote Free plan apiextensionLinuxMacself-hosted $3,920/mo9.1
    Elm Reactor vs Deepnote
  5. 5
    Datalore Free plan apiLinuxself-hostedWeb 9.0
    Elm Reactor vs Datalore
  6. 6
    GitHub Codespaces Free plan AndroidapiextensioniOSLinux $0.07/mo8.9
    Elm Reactor vs GitHub Codespaces
  7. 7
    Lightning AI Studios Free plan apiWeb 8.9
    Elm Reactor vs Lightning AI Studios
  8. 8
    Arduino Cloud Editor Free plan AndroidLinuxMacWebWin $1.67/mo8.9
    Elm Reactor vs Arduino Cloud Editor
  9. 9
    Daytona Free plan apiLinuxMacself-hostedWeb Free8.6
    Elm Reactor vs Daytona
  10. 10
    JupyterLab Free plan LinuxMacself-hostedWeb Free8.5
    Elm Reactor vs JupyterLab
  11. 11
    RunCode.io AndroidextensioniOSLinuxMac 8.5
    Elm Reactor vs RunCode.io
  12. 12
    AWS Cloud9 Free plan LinuxWeb Free8.4
    Elm Reactor vs AWS Cloud9
  13. 13
    CodePen Free plan apiWeb $8/mo8.4
    Elm Reactor vs CodePen
  14. 14
    StackBlitz Free plan apiself-hostedWeb Free8.4
    Elm Reactor vs StackBlitz
  15. 15
    Observable Free plan self-hostedWeb $2,225/mo8.3
    Elm Reactor vs Observable
  16. 16
    Val Town Free plan apiWeb $21/mo8.3
    Elm Reactor vs Val Town
  17. 17
    Kaggle Notebooks Free plan apiWeb Free8.2
    Elm Reactor vs Kaggle Notebooks
  18. 18
    Anaconda Notebooks Free plan Web $15/mo8.2
    Elm Reactor vs Anaconda Notebooks
  19. 19
    JDoodle Free plan AndroidapiextensioniOSWeb 8.2
    Elm Reactor vs JDoodle
  20. 20
    Scratch Free plan AndroidMacWebWin $2.92/mo8.2
    Elm Reactor vs Scratch

Elm Reactor alternatives compared

#PlatformScoreFree planFromRuns on
1Playcode9.3Free plan$25/moAndroid, iOS, Linux, Mac, Web, Windows
2Replit9.2Free plan$18/moAndroid, iOS, Linux, Mac, Web, Windows
3Coder9.1Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
4Deepnote9.1Free plan$3,920/moAPI, Browser, Linux, Mac, self-hosted, Web, Windows
5Datalore9.0Free plan—API, Linux, self-hosted, Web
6GitHub Codespaces8.9Free plan$0.07/moAndroid, API, Browser, iOS, Linux, Mac, Web, Windows
7Lightning AI Studios8.9Free plan—API, Web
8Arduino Cloud Editor8.9Free plan$1.67/moAndroid, Linux, Mac, Web, Windows
9Daytona8.6Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
10JupyterLab8.5Free planFreeLinux, Mac, self-hosted, Web
11RunCode.io8.5No—Android, Browser, iOS, Linux, Mac, Web, Windows
12AWS Cloud98.4Free planFreeLinux, Web
13CodePen8.4Free plan$8/moAPI, Web
14StackBlitz8.4Free planFreeAPI, self-hosted, Web
15Observable8.3Free plan$2,225/moself-hosted, Web
16Val Town8.3Free plan$21/moAPI, Web
17Kaggle Notebooks8.2Free planFreeAPI, Web
18Anaconda Notebooks8.2Free plan$15/moWeb
19JDoodle8.2Free plan—Android, API, Browser, iOS, Web
20Scratch8.2Free plan$2.92/moAndroid, Mac, Web, Windows
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Questions about Elm Reactor alternatives

What is the best alternative to Elm Reactor?

Playcode, number 1 in coding playgrounds with a score of 9.3 out of 10. The others here: Replit, Coder, Deepnote and 16 more.

What is the best free alternative to Elm Reactor?

Playcode is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.