Flems vs StackBlitz
Flems
flems.io
StackBlitz
stackblitz.comSide by side
| Figure | Flems | StackBlitz |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 0 | 8 |
| Spec score · Coding Playgrounds | 6.9 (#135) | 9.4 (#2) |
| Browser execution | After the page loads, code is computed in the browser and saved as a compressed string in the URL. | Its editor, package manager, development server and Git workflow can execute in the browser tab instead of on remote virtual machines. |
| Product | Flems describes itself as a browser coding playground. | StackBlitz describes itself as an instant full-stack web IDE for the JavaScript ecosystem. |
| Runtime | The module uses an iframe as a runtime for the code being edited. | WebContainers run Node.js development environments inside the browser tab. |
| Support | The module README directs users who need bundling help to create an issue. | The site links to StackBlitz Community, documentation, and Enterprise Sales for support and contact. |
Plans
StackBlitz
- Personal+Price not published
- Enterprise ServerPrice not published
- PersonalFree
- PersonalFree
- Pro$25 a month
- Teams$60 a month
- EnterprisePriced on request
- Enterprise & Self-hostedPriced on request
In their own words
StackBlitz
StackBlitz is a browser-based full-stack web IDE for the JavaScript ecosystem. Its WebContainers run Node.js development environments inside a browser tab, and the service lists millisecond startup and offline work. StackBlitz presents rapid prototyping and coding interviews as use cases. Integrations include a Figma plugin, Storybook addon, and userscript for opening GitHub projects in Codeflow. Viewing and editing projects needs no account, but saving or collaborating requires GitHub. WebContainers depend on SharedArrayBuffer and cross-origin isolation. Enterprise options connect GitHub Enterprise, GitLab, Bitbucket, private npm registries, JFrog Artifactory, and Sonatype Nexus. Enterprise code runs in an isolated browser sandbox with SAML2 single sign-on, an admin portal, and self-hosting on bare metal or in a VPC through Kubernetes. Plans include free access and a 14-day trial; listed plan prices are not provided.