Best Flems Alternatives in 2026
Updated
20 apps from coding playgrounds ranked against Flems on the same published basis.
- 1Flems vs Replit
- 2Flems vs GitHub Codespaces
- 3Flems vs Playcode
- 4Flems vs JupyterLab
- 5Flems vs Coder
- 6Flems vs AWS Cloud9
- 7Flems vs Datalore
- 8Flems vs Deepnote
- 9Flems vs CodePen
- 10Flems vs Google Colab
- 11Flems vs StackBlitz
- 12Flems vs RunCode.io
- 13Flems vs Kaggle Notebooks
- 14Flems vs Observable
- 15Flems vs Val Town
- 16Flems vs JDoodle
- 17Flems vs JSFiddle
- 18Flems vs Lightning AI Studios
- 19Flems vs Theia IDE
- 20Flems vs Scratch
Flems alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Replit | 8.4 | Free plan | $18/mo | Android, iOS, Linux, Mac, Web, Windows |
| 2 | GitHub Codespaces | 8.2 | Free plan | $0.07/mo | Android, API, Browser, iOS, Linux, Mac, Web, Windows |
| 3 | Playcode | 8.1 | Free plan | $25/mo | Android, iOS, Linux, Mac, Web, Windows |
| 4 | JupyterLab | 8.0 | Free plan | Free | Linux, Mac, self-hosted, Web |
| 5 | Coder | 8.0 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 6 | AWS Cloud9 | 7.9 | Free plan | Free | Linux, Web |
| 7 | Datalore | 7.9 | Free plan | — | API, Linux, self-hosted, Web |
| 8 | Deepnote | 7.9 | Free plan | $3,920/mo | API, Browser, Linux, Mac, self-hosted, Web, Windows |
| 9 | CodePen | 7.8 | Free plan | $8/mo | API, Web |
| 10 | Google Colab | 7.8 | Free plan | — | API, Browser, Web |
| 11 | StackBlitz | 7.8 | Free plan | Free | API, self-hosted, Web |
| 12 | RunCode.io | 7.8 | No | — | Android, Browser, iOS, Linux, Mac, Web, Windows |
| 13 | Kaggle Notebooks | 7.7 | Free plan | Free | API, Web |
| 14 | Observable | 7.7 | Free plan | $2,225/mo | self-hosted, Web |
| 15 | Val Town | 7.7 | Free plan | $21/mo | API, Web |
| 16 | JDoodle | 7.7 | Free plan | — | Android, API, Browser, iOS, Web |
| 17 | JSFiddle | 7.6 | Free plan | €8/mo | API, Web |
| 18 | Lightning AI Studios | 7.6 | Free plan | — | API, Web |
| 19 | Theia IDE | 7.6 | Free plan | Free | Browser, Linux, Mac, self-hosted, Web, Windows |
| 20 | Scratch | 7.6 | Free plan | $2.92/mo | Android, Mac, Web, Windows |
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Questions about Flems alternatives
What is the best alternative to Flems?
Replit, number 1 in coding playgrounds with a score of 8.4 out of 10. The others here: GitHub Codespaces, Playcode, JupyterLab and 16 more.
What is the best free alternative to Flems?
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 free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.