NIS 2 software compared: closed US SaaS versus open, EU-sovereign compliance
What matters in a tool you use to meet an EU law.
A structural question, not a brand fight
The market for compliance software is shaped by US platforms. They are well built. For NIS 2 there is a structural question all the same: you are meeting a European resilience law with a closed tool whose data and code you cannot inspect.
This article compares the models on their merits, without talking any single vendor down.
Compliance lives on evidence. An auditor asks how data is processed, where it sits, and who has access. With open-source software you can check that directly instead of relying on vendor assurances.
That the evidence tool itself is a black box is the weak point of the closed model.
NIS 2 aims at a high common level of cybersecurity across the Union (Article 1 NIS 2). It contains no rule against US cloud providers. Holding compliance data in a US cloud is a question of dependency and, for personal data, of the GDPR transfer rules.
Self-hostable or EU-hosted tools keep both questions small.
Your records, your evidence and your process should belong to you. With open tools you can export, self-host or change provider without starting over.
Lock-in is a cost that only shows up the day you want to leave.
If you need many certified integrations and dedicated support and you have the budget, a commercial tool can make sense. NIS 2 prescribes effective measures and evidence, not a particular product (Article 21(2) NIS 2).
For a Mittelstand company that mainly needs structure and a clean audit trail, integrations are rarely the bottleneck.
There is a mature market of open tools, among them verinice, CISO Assistant, ISMS Builder and nisd2.eu. They differ in depth and focus.
What they share is transparency, no lock-in, and a low entry cost.
Frequently asked questions
Is open source less secure?
No. The many-eyes principle often leads to faster patching. What matters is maintenance and updates, not whether the code is open.
Does NIS 2 require a particular tool?
No. NIS 2 requires effective measures and evidence (Article 21 NIS 2), not a specific product.
May I use a US tool for EU compliance?
Often yes, legally. NIS 2 does not forbid it. Check the data transfer under the GDPR and the dependency it creates.
What is EU sovereignty in this context?
Keeping the data and the control over your compliance process within your reach: EU hosting or self-hosting, exportable data, inspectable code.
Is a commercial tool ever the better choice?
Yes, when certified integrations and dedicated support outweigh openness and cost for your situation.
Been asked to handle NIS2?
In the end you have everything in one document: what is done, what is still open, and your management's approval with name and date. The app writes the texts.
