GLACIS vs Prompt Inspector
GLACIS
glacis.ioPrompt Inspector
promptinspector.ioSide by side
| Figure | GLACIS | Prompt Inspector |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 5 |
| Spec score · LLM Security Tools | 7.8 (#9) | 8.5 (#5) |
| Support | Glacis says it typically replies to contact requests within one business day and takes on a small number of managed deployments each quarter. | The homepage lists community support for self-hosted users and dedicated SLA support for enterprise customers. |
| What it does | Glacis places runtime controls in the path of AI actions and creates signed records of covered decisions for external verification. | Prompt Inspector places a real-time security layer between untrusted input and an LLM application or agent. |
Plans
Prompt Inspector
- FreeFree
- FreeFree
- EnterprisePriced on request
- ProPriced on request
- StarterPriced on request
In their own words
GLACIS
GLACIS puts controls in the path of AI actions and creates signed records of covered decisions for external verification. When an action crosses configured bounds, it can be constrained, held for a person, or denied; other actions can pass through unchanged. Glacis says it operates nine production components as a managed service alongside the identity provider, cloud, and security systems a customer already uses. Records use OVERT, a published open format that implementers and reviewers can inspect, and can be checked in a browser without a Glacis account. The site says payloads remain in the customer’s environment and records contain hashes; omitting protected fields depends on deployment setup. A record check does not establish whether an action was correct, whether every event was captured, or whether a system is safe or compliant. GLACIS is available by API, web, and self-hosted deployment. Its Free account costs nothing, with no card required. The contact page describes a six-week evaluation for a workflow under review.
Prompt Inspector
Prompt Inspector has no write-up on Specifiction yet; its figures are above.