Modular Prompt Library vs Prompt Assay
| Modular Prompt Library | Prompt Assay | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | No |
| Paid from | $2.50/mo | $49/mo |
| Open source | No | No |
| Platforms | Web | api, Web |
| Free plan | Yes | Yes |
| Prompt versioning | Yes | Yes |
| Prompt testing | Yes | Yes |
| Prompt templates | Yes | Yes |
| Access controls | Yes | Yes |
| Model provider support | multi-provider | multi-provider |
| API or SDK access | — | Yes |
Both are listed in Best Prompt Management Software. On Samsung Mobile US Press, Modular Prompt Library scores higher on our published basis.