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Best Elm Reactor Alternatives in 2026

Updated

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

  1. 1
    Replit Free plan AndroidiOSLinuxMacWeb $18/mo9.5
    Elm Reactor vs Replit
  2. 2
    Playcode Free plan AndroidiOSLinuxMacWeb $25/mo9.3
    Elm Reactor vs Playcode
  3. 3
    GitHub Codespaces Free plan AndroidapiextensioniOSLinux $0.07/mo9.1
    Elm Reactor vs GitHub Codespaces
  4. 4
    Coder Free plan apiLinuxMacself-hostedWeb Free8.9
    Elm Reactor vs Coder
  5. 5
    Deepnote Free plan apiextensionLinuxMacself-hosted $3,920/mo8.9
    Elm Reactor vs Deepnote
  6. 6
    Arduino Cloud Editor Free plan AndroidLinuxMacWebWin $1.67/mo8.9
    Elm Reactor vs Arduino Cloud Editor
  7. 7
    Datalore Free plan apiLinuxself-hostedWeb 8.7
    Elm Reactor vs Datalore
  8. 8
    Lightning AI Studios Free plan apiWeb 8.5
    Elm Reactor vs Lightning AI Studios
  9. 9
    JupyterLab Free plan LinuxMacself-hostedWeb Free8.4
    Elm Reactor vs JupyterLab
  10. 10
    Daytona Free plan apiLinuxMacself-hostedWeb Free8.4
    Elm Reactor vs Daytona
  11. 11
    Codeground AI Free plan LinuxMacWebWin $9.99/mo8.4
    Elm Reactor vs Codeground AI
  12. 12
    JDoodle Free plan AndroidapiextensioniOSWeb 8.3
    Elm Reactor vs JDoodle
  13. 13
    AWS Cloud9 Free plan LinuxWeb Free8.2
    Elm Reactor vs AWS Cloud9
  14. 14
    CodePen Free plan apiWeb $8/mo8.2
    Elm Reactor vs CodePen
  15. 15
    StackBlitz Free plan apiself-hostedWeb Free8.2
    Elm Reactor vs StackBlitz
  16. 16
    Scratch Free plan AndroidMacWebWin $2.92/mo8.2
    Elm Reactor vs Scratch
  17. 17
    MATLAB Grader Free plan LinuxMacWebWin Free8.2
    Elm Reactor vs MATLAB Grader
  18. 18
    Paperspace Gradient Free plan apiLinuxMacWebWin $8/mo8.2
    Elm Reactor vs Paperspace Gradient
  19. 19
    PaizaCloud Cloud IDE Free plan AndroidiOSLinuxMacWeb $9.80/mo8.2
    Elm Reactor vs PaizaCloud Cloud IDE
  20. 20
    Firebase Studio AndroidWeb 8.1
    Elm Reactor vs Firebase Studio

Elm Reactor alternatives compared

#ToolScoreFree planFromRuns on
1Replit9.5Free plan$18/moAndroid, iOS, Linux, Mac, Web, Windows
2Playcode9.3Free plan$25/moAndroid, iOS, Linux, Mac, Web, Windows
3GitHub Codespaces9.1Free plan$0.07/moAndroid, API, Browser, iOS, Linux, Mac, Web, Windows
4Coder8.9Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
5Deepnote8.9Free plan$3,920/moAPI, Browser, Linux, Mac, self-hosted, Web, Windows
6Arduino Cloud Editor8.9Free plan$1.67/moAndroid, Linux, Mac, Web, Windows
7Datalore8.7Free plan—API, Linux, self-hosted, Web
8Lightning AI Studios8.5Free plan—API, Web
9JupyterLab8.4Free planFreeLinux, Mac, self-hosted, Web
10Daytona8.4Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
11Codeground AI8.4Free plan$9.99/moLinux, Mac, Web, Windows
12JDoodle8.3Free plan—Android, API, Browser, iOS, Web
13AWS Cloud98.2Free planFreeLinux, Web
14CodePen8.2Free plan$8/moAPI, Web
15StackBlitz8.2Free planFreeAPI, self-hosted, Web
16Scratch8.2Free plan$2.92/moAndroid, Mac, Web, Windows
17MATLAB Grader8.2Free planFreeLinux, Mac, Web, Windows
18Paperspace Gradient8.2Free plan$8/moAPI, Linux, Mac, Web, Windows
19PaizaCloud Cloud IDE8.2Free plan$9.80/moAndroid, iOS, Linux, Mac, Web, Windows
20Firebase Studio8.1No—Android, Web
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Questions about Elm Reactor alternatives

What is the best alternative to Elm Reactor?

Replit, number 1 in coding playgrounds with a score of 9.5 out of 10. The others here: Playcode, GitHub Codespaces, Coder and 16 more.

What is the best free alternative to Elm Reactor?

Replit 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 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.