Side by side
CodeSandbox vs db<>fiddle
Both stand on coding playgrounds. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Choose CodeSandbox if you need isolated development environments that can be started through an SDK, resumed from snapshots, or used for parallel agents and CI/CD tests. The free plan provides a way to start, while teams needing more capacity can consider the listed Build, Scale, and Enterprise tiers. Look elsewhere if you need a stated price for a paid plan before choosing.
Visit CodeSandbox
db<>fiddle combines an online SQL editor with permanent result links and an API for ordered batches. Its non-enumerable fiddles make link sharing the route to access, and submitted content falls under CC0.
Visit db<>fiddleThe facts
| CodeSandbox | db<>fiddle | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Web, iPhone | API, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 3 | 1 |
| Maker | CodeSandbox | db<>fiddle |
| Website | codesandbox.io | dbfiddle.uk |
| On coding playgrounds | #21 of 138 | #75 of 138 |
CodeSandbox: what it does well
- Isolates each environment for safer untrusted-code execution.
- Starts, clones, or restores microVMs within two seconds.
- Resumes work in the same sandbox from snapshots.
- Supports parallel agents and agent A/B testing.
- Tests can run in sandboxes that hibernate afterward.
What to know first
- Build includes five members and 40 monthly VM-credit hours.
- Scale is limited to 20 members and 250 concurrent VMs.
- Enterprise plan pricing is not provided here.
db<>fiddle: what it does well
- Free to use without an account.
- Supports a wide range of database engines.
- SQL batches run in order against one fresh database.
- Fiddle URLs can return SQL and results as Markdown.
- Runs execute on a real disposable VM.
What to know first
- Fiddles require a shared link for others to see them.
- Submitted content is covered by Creative Commons CC0.
- Some engine versions may not offer sample schemas.
Alternatives to CodeSandbox Alternatives to db<>fiddle The whole list