Augustus vs PromptGuard
| Augustus | PromptGuard | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | $19/mo |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Windows | api, extension, Linux, macOS, self-hosted, Web, Windows |
| Prompt injection tests | Yes | Yes |
| Jailbreak tests | Yes | Yes |
| Data leakage tests | Yes | Yes |
| Unsafe output tests | Yes | Yes |
| Custom test cases | Yes | Yes |
| Deployment mode | self_hosted | both |
| Free plan | — | Yes |
Both are listed in Best AI Security Testing Tools. On Samsung Mobile US Press, PromptGuard scores higher on our published basis.