Limes Security GmbH

Your strong partner for OT & IoT security

About us

We are a leading cyber security company in the German-speaking region of Europe with a focus on protecting OT (Operational Technology) and IoT. We help our customers to operate industrial plants, networked systems and digital infrastructures securely. With a team of highly qualified security specialists, we support operators of critical infrastructures, industrial companies and manufacturers in implementing sustainable cyber security strategies. Our portfolio ranges from consulting services to security assessments in the form of penetration tests, support in the implementation of standards, laws and regulations and a comprehensive range of training courses through our Limes Academy.

Our daily work combines in-depth technical expertise with many years of project experience in a wide range of industries. Through close cooperation with the international security community, active research work and contributions to security standards, we develop solutions that help organizations to identify risks at an early stage, ward off attacks and make their systems resilient in the long term. True to our guiding principle: Defending what matters.

It’s not about limes 🍋‍🟩🍋

Limes vs. limes – this may seem confusing at first and you are not alone if you immediately think of a lime when you hear our company name. However, the correct pronunciation makes all the difference and also has a historical background, which we would like to briefly explain to you!

We are LIMES Security

[ˈliːmɛs]

So where does our name come from? Even the ancient Romans knew how to protect themselves – with a fortified border security system called the Limes. The 5,000 km long wall protected the Roman Empire from attackers, just as our services protected your plants, machines, systems and products. This philosophy is therefore also firmly anchored in our company name and reflects what is important to us: knowing boundaries, finding weak points and protecting our and your values.

We are Limes Security!

Get to know our experts

Are you interested in cyber security in the area of critical infrastructure or OT/IoT?

Become part of our team now!

Partnerships for strengthened OT security

In order to achieve the best results for you, even in specialized projects, we work with selected partners whose core competencies complement our services where necessary and appropriate. Highly concentrated expertise, specialized technologies and a strong network in the OT security community create direct added value for your cyber security project – and always with the proven Limes quality guarantee!

Upcoming Events - where you can meet us

Employees of Limes Security and ASL at the booth of the IKT Security Conference 2025
Messe

IKT Security Conference 2026

Linz, Upper Austria
16. September 2026 To 17. September 2026
Plenary session of the Hagenberg Security Forum, in which Limes Security is also participating
Konferenz

Security Forum 2026

Hagenberg/Mühlkreis
5. May 2026 To 6. May 2026
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