When Prompt Security fits
- You need broad GenAI security: prompt-injection and jailbreak defence for homegrown LLM apps, plus employee-facing controls.
- You want one platform covering shadow-AI discovery, response inspection, and policy across many models.
- Your security team prefers a managed platform (SaaS or on-premise) with centralised GenAI policy enforcement.
When Locke fits
- Your priority is sensitive data in prompts, detected and masked on the device before anything is sent.
- Zero-knowledge is a hard requirement: no platform should inspect the content you are protecting.
- You want a per-user Early Access desktop app (Locke), free for one person, rather than a full GenAI-security suite.
Side-by-side
| Dimension | Locke | Prompt Security |
|---|---|---|
| Scope | Sensitive data in AI prompts, masked on the device. | Broad GenAI security: leakage, injection, jailbreaks, shadow AI. |
| Where inspection runs | On the device, before any network call. | Through the platform (SaaS or on-premise), inspecting content. |
| Trust model | Zero-knowledge: the vendor never sees prompt content. | Content is inspected by the platform to enforce policy. |
| Entry point | Locke Free costs nothing (Early Access); Teams starts at $14.99 per seat a month. | Commercial platform. Contact vendor for current pricing. |
| Best for | Local-first, zero-knowledge control of AI prompts. | End-to-end GenAI security across apps and employee use. |
Bottom line
Prompt Security is a broad GenAI-security platform, useful if you also need injection defence for your own LLM apps and centralised policy across employee AI use. Locke is narrower and local by design: it keeps sensitive prompt data on the device, with nothing for a vendor to inspect. For full GenAI-security coverage, look at Prompt Security. If local-first and zero-knowledge come first, choose Locke. Confirm current capabilities and ownership with the vendor.
