Modular Prompt Library vs Vellum
| Modular Prompt Library | Vellum | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | No |
| Paid from | $2.50/mo | $30/mo |
| Open source | No | No |
| Platforms | Web | Android, extension, iOS, macOS, self-hosted, Web, Windows |
| Free plan | Yes | Yes |
| Prompt versioning | Yes | — |
| Prompt testing | Yes | — |
| Prompt templates | Yes | — |
| Access controls | Yes | — |
| Model provider support | multi-provider | — |
Both are listed in Best Prompt Management Software. On Samsung Mobile US Press, Vellum scores higher on our published basis.