Enterprise & Government

For places where nothing leaves the building

Prompt Firewall can run entirely inside your own network, with no connection to the outside world. Your data never leaves your premises. Same scanning and containment as our cloud service, fully under your control, ready for the strictest environments from day one.

Three ways to run it

Same scanning and containment, wherever it fits best

Run it on your own servers, on small disconnected devices, or let us manage it for you. You choose what suits your environment. Both layers of protection are identical across all three.

On your own servers

Install it behind your firewall and run it like any other internal service. Updates arrive without downtime. All logs stay on your systems. Ideal for production workloads on your own infrastructure.

On air-gapped devices

A lightweight version that runs with no network at all. Full scanning and containment. Perfect for disconnected sites, field operations, small devices, and any place where reaching out to the internet is not an option.

We run it for you

No setup, no maintenance, no infrastructure to worry about. We handle it all and keep your protection up to date automatically. A good starting point if you want to move to self-hosted later.

Same protection, everywhere

Start in the cloud when speed matters. Move to your own servers when you want more control. Take it to disconnected sites when you must. You stay protected to the same standard in all three.

Fully isolated

Nothing goes out.
Nothing comes in.

When you run it inside your network, Prompt Firewall never calls home. No phone-home checks, no telemetry, no outside connections. Your content and your logs stay exactly where you want them.

When we send you updates to our protection rules, they arrive encrypted with strong encryption through preapproved methods. You bring them in on approved media, load them in, and you’re up to date. Everything else stays inside your walls.

Security you can count on

Protection, all the way through

Everything about how we run is built to reassure a security team. Tamper-proof updates, a clear record of every decision, and no hidden dependencies.

Tamper-proof updates

Strongly encrypted rule packs

Our protection rules arrive sealed. No one else can read or change them along the way. Every update is clearly labelled so you always know which version is in use.

Updates with zero downtime

Never offline

New protection rules slot in without stopping your service. If an update ever looks wrong, the previous version stays in place automatically. You’re never left unprotected.

Full audit trail

Every request, recorded

Every scan and containment is logged with what came in, what was found, and how it was protected. Clear evidence for auditors, customers, and your own security team, without slowing anything down.

Nothing unexpected

What you install is what runs

No surprises, no silent updates, no mystery downloads. Everything is pinned to versions you approve. Once installed, nothing changes without your say-so.

Traceable decisions

You can always explain why

Every response tells you which version of our rules made the decision. If an auditor, regulator, or customer asks questions months later, you can recreate the exact conditions and prove why.

Only what you need

Turn features on as you go

You don’t have to run everything. Start with the core protection, then enable extras like image reading or deeper language analysis when and if you need them.

Modest by design

Runs on hardware you already have

Whether you have a small device in the field or a busy data centre, Prompt Firewall fits. It adapts to the hardware it runs on, making the most of what’s available without asking for more.

Small

Field and embedded devices

2 CPU cores, 2 GB RAM. No graphics card.

For disconnected sites, field operations, and embedded kit. Same protection, in a smaller footprint.

Standard

Normal production use

3 to 8 CPU cores, 8 to 16 GB RAM. No graphics card.

For typical company deployments, internal tools, and team-scale AI applications.

High volume

Enterprise-scale traffic

16+ CPU cores, or several servers together. 1,000+ requests per second. Still no graphics card.

For very busy applications, large customer-facing platforms, and enterprise-wide deployments. Scales smoothly as you grow.

Compliance & regulated industries

Built for environments where compliance is not optional

Your data stays with you
Content never leaves your premises. No third party sees it, not even us. Everything is processed and logged inside your own systems.
Reliable, repeatable results
The same piece of content always gets the same verdict. If you need to review a past decision, you can recreate it exactly.
Clear explanations
Every block comes with a plain-English reason: what was caught, how serious it was, and which part of the content triggered it. No black box.
Financial services
Scan and contain customer documents, emails, and outside data feeds before your AI analyses them. Reliable results with full audit trails keep your compliance team comfortable.
Healthcare
Protect AI that handles patient messages, clinical notes, and medical records. Nothing sensitive ever leaves your organisation.
Legal
For AI-assisted document review where every decision must be defensible. Containment ensures external content stays within strict boundaries. You get a complete, auditable record of every request.
Defence and intelligence
Fully disconnected operation, a small footprint, a simple command-line option for tactical use, and a full record of every decision for oversight.
Critical infrastructure
Energy, transport, and telecoms. For operations where reliance on the public cloud is simply not acceptable.
GDPR & data protection
heySec is an EU company regulated under EU law. A Data Processing Agreement (DPA) is included with every Enterprise contract. Our supervisory authority is the Estonian Data Protection Inspectorate.

Support

A team behind your team

Enterprise customers get a dedicated account manager, direct access to our security research team, and priority engineering support. Keeping you protected is on us.

  • Dedicated account manager
  • 24/7 priority support
  • Quarterly security reviews
  • Custom threat model development
24/7
Priority support

Talk to a team that’s built for your environment

Procurement paths for regulated industries. Fully disconnected deployments. Rollouts that fit your classification rules. Tell us what you’re protecting and we’ll design the fit.