Prompt Inspector vs Vigil Guard
| Prompt Inspector | Vigil Guard | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | — |
| Free plan | Yes | — |
| Prompt injection defense | Yes | Yes |
| PII redaction | — | Yes |
| Secrets detection | — | Yes |
| Output guardrails | — | Yes |
Both are listed in Best LLM Security Tools. On Samsung Mobile US Press, Prompt Inspector scores higher on our published basis.