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 Coder
- 5Flems vs JupyterLab
- 6Flems vs Deepnote
- 7Flems vs AWS Cloud9
- 8Flems vs CodePen
- 9Flems vs Datalore
- 10Flems vs Google Colab
- 11Flems vs StackBlitz
- 12Flems vs JDoodle
- 13Flems vs Arduino Cloud Editor
- 14Flems vs Observable
- 15Flems vs Val Town
- 16Flems vs Firebase Studio
- 17Flems vs Kaggle Notebooks
- 18Flems vs Lightning AI Studios
- 19Flems vs CodeSandbox
- 20Flems vs JSFiddle
Flems alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Replit | 9.8 | Free plan | $18/mo | Android, iOS, Linux, Mac, Web, Windows |
| 2 | GitHub Codespaces | 9.4 | Free plan | $0.07/mo | Android, API, Browser, iOS, Linux, Mac, Web, Windows |
| 3 | Playcode | 9.2 | Free plan | $25/mo | Android, iOS, Linux, Mac, Web, Windows |
| 4 | Coder | 9.0 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 5 | JupyterLab | 8.9 | Free plan | Free | Linux, Mac, self-hosted, Web |
| 6 | Deepnote | 8.9 | Free plan | $3,920/mo | API, Browser, Linux, Mac, self-hosted, Web, Windows |
| 7 | AWS Cloud9 | 8.8 | Free plan | Free | Linux, Web |
| 8 | CodePen | 8.8 | Free plan | $8/mo | API, Web |
| 9 | Datalore | 8.8 | Free plan | — | API, Linux, self-hosted, Web |
| 10 | Google Colab | 8.7 | Free plan | — | API, Browser, Web |
| 11 | StackBlitz | 8.7 | Free plan | Free | API, self-hosted, Web |
| 12 | JDoodle | 8.7 | Free plan | — | Android, API, Browser, iOS, Web |
| 13 | Arduino Cloud Editor | 8.7 | Free plan | $1.67/mo | Android, Linux, Mac, Web, Windows |
| 14 | Observable | 8.6 | Free plan | $2,225/mo | self-hosted, Web |
| 15 | Val Town | 8.6 | Free plan | $21/mo | API, Web |
| 16 | Firebase Studio | 8.5 | No | — | Android, Web |
| 17 | Kaggle Notebooks | 8.5 | Free plan | Free | API, Web |
| 18 | Lightning AI Studios | 8.5 | Free plan | — | API, Web |
| 19 | CodeSandbox | 8.4 | No | — | Web, iOS |
| 20 | JSFiddle | 8.4 | Free plan | €8/mo | API, Web |
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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 9.8 out of 10. The others here: GitHub Codespaces, Playcode, Coder and 16 more.
What is the best free alternative to Flems?
Replit is the best-ranked alternative with a free plan. 18 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: documentation depth, a free tier and the platforms it runs on.