PromptFluent vs SpacePrompts
| PromptFluent | SpacePrompts | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | No |
| Paid from | $14/mo | $5/mo |
| Open source | No | No |
| Platforms | extension, Web | api, extension, Web |
| Free plan | Yes | Yes |
| Prompt versioning | Yes | Yes |
| Prompt testing | Yes | Yes |
| Approval workflows | Yes | — |
| Access controls | Yes | Yes |
| Model provider support | multi-provider | provider-agnostic |
| Prompt templates | — | Yes |
| API or SDK access | — | Yes |
Both are listed in Best Prompt Management Software. On Samsung Mobile US Press, SpacePrompts scores higher on our published basis.