CodeSandbox
Free, instant, collaborative sandboxes for rapid web development.
mjml.
The Responsive Email Framework.
Updated February 2026
| CodeSandbox | mjml. | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 10 | 2 |
| Pros | 8 | 0 |
| FactScore™ | 52.1 | 23.9 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in CodeSandbox — Pros
Fast performance Sandpack library Browser-based development Code sharing Live code editing No setup required Open source Responsive support teamBoth tools — Pros
—Only in mjml. — Pros
No unique pros listedOnly in CodeSandbox — Cons
Buggy Read-only limitationsBoth tools — Cons
—Only in mjml. — Cons
—Details
| CodeSandbox | mjml. | |
|---|---|---|
| Categories | Team collaboration software, Code editors, Cloud Computing Platforms | Code editors, Email marketing |
| Platforms | Web | Web |
| Became Popular | June 12, 2017 | February 4, 2016 |
| Website | codesandbox.io | mjml.io |
Who Should Pick Which?
Choose CodeSandbox if...
- Fast performance
- Sandpack library
- Browser-based development
Choose mjml. if...
- No unique pros listed
With a FactScore™ of 52.1 vs 23.9, CodeSandbox leads in community reception. CodeSandbox uniquely offers Fast performance and Sandpack library, while mjml. stands out for No unique pros listed.
What Users Say
CodeSandbox
The most crucial feature in Sketch2App is previewing and exporting the generated app and this wouldn't be possible without the Sandpack library recently launched by CodeSandbox team.
Live code, real fast! CodeSandbox powers our file uploader demos, giving users a seamless hands-on experience without setup hassle. Perfect for showcasing live examples 💻⚡
Their SDK was key to powering our live previews and micro VMs, helped us move fast with a super responsive team behind it
mjml.
No reviews yet
Related Comparisons
Frequently Asked Questions
Which is better, CodeSandbox or mjml.?
Based on FactScore™, CodeSandbox leads with a score of 52.1 vs 23.9. CodeSandbox has a higher rating of 5.0★ compared to 5.0★.
What are the pros of CodeSandbox compared to mjml.?
CodeSandbox uniquely offers: Fast performance, Sandpack library, Browser-based development, Code sharing, Live code editing.
What are the pros of mjml. compared to CodeSandbox?
mjml. uniquely offers: No unique pros listed.
Is CodeSandbox better rated than mjml.?
CodeSandbox is rated 5.0★ from 10 reviews. mjml. is rated 5.0★ from 2 reviews.
What is the FactScore™ of CodeSandbox and mjml.?
FactScore™ weighs rating and review volume together. CodeSandbox scores 52.1 and mjml. scores 23.9.
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