About
Cybersecurity, made simple
We build Prompt Firewall so every team shipping AI can protect what their models read. No research project. No expensive hardware. No second vendor.
The problem we’re solving
AI apps read content from everywhere. Customer emails. Uploaded documents. Web pages. Support tickets. Search results. Tool responses. Every piece of it ends up in front of your model, and attackers hide instructions inside that content to trick the model, steal data, or break the rules you set.
The old security tools weren’t built for this. They were built to guard networks and websites, not to spot a paragraph of text that’s trying to manipulate an AI.
That’s what Prompt Firewall does. It gives your AI two layers of protection in the same run. Multiple detection engines scan content in 3 to 12 ms, across hundreds of languages. Then containment wraps it in a secure boundary your AI treats as data, not instructions. Scanning catches attacks we recognise. Containment protects against everything else. Use our cloud service and you’re protected from day one. For teams that need full control, we also offer versions that run entirely on your own infrastructure.
Principles
What guides us
01
Cybersecurity, made simple
Security tools shouldn’t require a year of ramp-up. One API call. One binary. One bill. The hard engineering sits behind the interface, not in your deployment guide.
02
Predictable beats lucky
Security decisions deserve explanations. Same content in, same answer out, every time. Every block comes with a clear reason. No black boxes.
03
Privacy built in, not bolted on
We keep logs so you have a full audit trail, but personal and sensitive information is automatically detected and redacted before anything is stored. On Enterprise, everything runs inside your own network with no outbound calls at all.
04
Do the work, then talk about it
We’d rather ship a detection that catches a new injection technique than a press release about it. When we talk, it’s because the work is already running in production.
Every doc, email, and web page your AI reads. Scanned and contained before it reaches the model.
Team
Built by security and systems engineers
We’ve spent years shipping infrastructure for buyers who can’t afford to get security wrong, regulated industries, air-gapped environments, the places where “move fast and break things” was never an option. Now we’re bringing that same discipline to AI. heySec is built by engineers who treat a prompt as exactly what it is: untrusted input that needs to be inspected before it reaches anything that matters.
We’re a small, focused team based across the EU. heySec is fully EU-owned and operated. Your data is subject to EU law and nothing else.
Get in touch
Questions about Prompt Firewall? Partnership ideas? Researching a specific attack vector? We’d love to hear from you.