CodePen vs Ideone
| CodePen | Ideone | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | $8/mo | — |
| Open source | No | No |
| Platforms | api, Web | Web |
| Free plan | Yes | Yes |
| Private projects | Yes | Yes |
Both are listed in Best Coding Playgrounds, Best Code Playground Software. On Specifiction, CodePen scores higher on our published basis.