Security software has a property most software doesn't: it rots. A containment policy that covered the known injection techniques in January is quietly weaker by June, not because anything changed in your stack, but because the techniques moved. New phrasings, new tool-abuse patterns, new ways to smuggle instructions through retrieved content. The protection didn't degrade — the world it was protecting against did.
Freshness is the product
This is why we sell the feed.
The containment layer is the mechanism. The feed is what keeps the mechanism current: continuously-maintained provenance rules, tool-authorization policies, and outbound patterns that track the injection techniques we and the broader research community are seeing in the wild. Last month's protection is genuinely worth less than this month's, and that decay is the whole reason a maintained subscription beats a frozen snapshot.
It's the same shape as the model that anti-malware and network IDS settled into decades ago. The detection engine isn't the moat. The steadily-updated coverage is. A signature set from two years ago runs fine and protects against almost nothing current; what you pay for is the team keeping it fresh.
What you're actually buying
Not a one-time install. A standing relationship with people whose job is to watch how AI systems get attacked and to push containment updates before those techniques reach you.
- Coverage that tracks the threat, so newly-observed injection techniques get contained policies, not a changelog you have to read and implement yourself.
- Decay you can see, because we'd rather show you when your last update landed than let stale coverage pose as current.
- Research, not just rules, since the people maintaining the feed are studying AI security directly — the updates come from understanding the attacks, not scraping a list.
Bridgekeeper reduces and contains prompt-injection risk in-process. The feed is what keeps that reduction from going stale. Buy the mechanism once and you own a snapshot; subscribe to the feed and you own the thing that matters — protection that doesn't quietly expire.