About Context Guard

Why Context Guard exists

Context Guard was founded by Alec Burrell. He runs AI systems in production daily and got tired of the gap between how fast people ship LLM features and how little security tooling exists for them. Prompt injection, context poisoning, data exfiltration - these are real failure modes with real impact, and the existing options are either enterprise platforms with six-figure contracts or scripts you cobble together at 2am.

Context Guard is the security layer that should have already existed. Drop it in front of your LLM traffic, get immediate protection, and it keeps improving as threats evolve. It has opinions about good defaults, is transparent about what it covers, and is designed for pain free integration into any public facing LLM system.

Mission

Make AI security available to every team shipping LLM features. The same threats hit a two-person startup and a Fortune 500. The same defences should be available to both. A reverse proxy that drops in, detects threats in real time, and gets smarter over time. No agents, no SDKs, no re-architecting. Point your base URL at Context Guard and you are protected.

Detection is hybrid by design: a deterministic regex layer for known patterns, source-aware analysis that separates trusted instructions from untrusted context, and an optional DeBERTa-v3 ML classifier for the adversarial edge cases that pattern matching alone cannot catch. Each layer earns its place by closing gaps the others leave open.

Built from experience

Every detection rule and policy feature in Context Guard came from a real failure mode encountered in production AI systems - not from guessing what might go wrong. Configuration is YAML, not a fifty-page wizard. Logs are structured. The proxy is a proxy, not a black box that needs an SDK in every service.

The ML classifier was added the same way: not because ML is fashionable, but because real adversarial attacks - obfuscated jailbreaks, novel prompt-injection phrasings, payloads written specifically to evade keyword filters - were slipping past the rule layer. The model fills that gap and is opt-in, so teams that want pure-rule determinism keep it.

Founder

Alec Burrell - Founder. Runs AI systems in production and started Context Guard because the security layer he needed for his own traffic did not exist. Director of Burrell Digital LTD (company number 15958808).