FlowMarket
Where to find OT cybersecurity suppliers: FlowMarket is a B2B sourcing network powered by an AI agent. You describe the situation — plant and control systems, regulatory obligations, current maturity and the outcome you need — and the agent matches you with OT security consultancies, integrators and product vendors, then requests quotes, credentials and scope so you can compare them in one place.
Sourcing OT cybersecurity
Securing production is a different discipline from securing an office. In IT, confidentiality usually comes first and a system can be patched and rebooted. In OT, availability and safety come first, the equipment may run software that lost support a decade ago, and rebooting a controller means stopping a line.
That difference matters when choosing a supplier. An excellent IT security firm without industrial experience will produce a report full of recommendations that cannot be implemented in a working plant, and the most reliable way to identify a supplier who understands this is to ask how they would approach a machine that cannot be patched.
Regulation has moved this from optional to required
NIS2 has substantially widened the range of manufacturers with legal cybersecurity obligations across the EU, bringing in many mid-sized companies that previously had none, and it attaches management accountability rather than leaving the topic with IT. Separately, new machinery placed on the EU market now carries security-related requirements of its own.
So establish your regulatory position before you buy anything, because it determines what you need to be able to demonstrate and to whom. Ask suppliers to state plainly which obligations they are helping you meet and what evidence the work produces — a security improvement that cannot be evidenced does not help you in an audit even when it genuinely reduces risk.
You cannot secure what you have not inventoried
Nearly every OT security programme that goes well starts with an asset inventory, and nearly every one that stalls skipped it. Most plants do not have a reliable list of what is connected, which firmware it runs, what talks to what, or which supplier has remote access, and buying tools before knowing that produces expensive visibility into a network nobody has mapped.
Ask how discovery is done, because active scanning can disturb fragile industrial devices — passive monitoring is the usual answer in production. And insist the output is a maintained asset register rather than a one-off report, since an inventory that ages for two years is a document rather than a control.
The controls that deliver most
- Segmentation — separating production from the office network and dividing production into zones, the single highest-value control in most plants.
- Remote access control — on-demand, authenticated, logged and time-limited vendor access, replacing the permanent connections most plants have.
- Backup and recovery — tested restoration of controller programs and engineering workstations, which is what actually shortens an incident.
- Monitoring — detection tuned for industrial protocols, useful once segmentation and inventory exist rather than before.
- Hardening and access — removing shared accounts and default credentials on engineering workstations, unglamorous and consistently effective.
Vendor remote access is the common exposure
Almost every plant has machines with permanent remote connections for the manufacturer's support, often set up years ago, sometimes undocumented, occasionally unknown to anyone currently employed. It is the most frequent route into industrial networks and the one most likely to be found in an assessment.
The fix is neither to forbid remote support nor to leave it open, but to broker it: access granted on request, tied to an identity, logged, and closed afterwards. Ask candidate suppliers how they implement this without making legitimate support so painful that people build a workaround, because a control that gets bypassed is worse than none.
IEC 62443 and what to buy against it
IEC 62443 is the reference framework for industrial security, covering the operator, the integrator and the product manufacturer, and it gives you a shared vocabulary for zones, conduits and security levels. It is useful as a structure for a programme rather than as a shopping list.
Be precise about what you are buying: an assessment against it, an implementation programme, a certified product, or ongoing managed monitoring are four different purchases. And ask what happens after the project — who reviews the segmentation when a new machine arrives, and who owns the response when something is detected at two in the morning during a production run.
How the AI agent matches suppliers
The agent reads your requirement rather than your keywords. It searches the FlowMarket network and connected industrial directories together, scores every candidate on how well it answers what you described — OT rather than purely IT experience, control system familiarity, IEC 62443 and regulatory support, assessment versus implementation versus monitoring capability, sector, and region — and drops anything that does not clear the bar. Each match comes back with a plain-language reason, so a consultancy, a systems integrator and a product vendor never look the same.