Best Compliance Software from Europe: Which Vendors Should You Consider?

As of November 2, 2026

The best compliance software from Europe depends on three things: the size of your company, the regulations you have to prove compliance with, and how much weight you put on the contracting party and control over your data. The vendors fall into three groups. Platforms with in-house experts also take on the data protection officer role, for example Kertos, DataGuard, and Proliance. Cyberday, ISMS.online, and Tenacy are examples of multi-framework software without a stated personal mandate. Dastra and Naaia offer specialized tools for privacy or AI governance. The tables show what each vendor states on its own website. We checked every entry on November 2, 2026, against each vendor's legal notice, framework pages, and pricing pages. "Not stated" means the pages we checked do not mention it.

Which compliance software vendors are based in Europe?

14 of the 16 vendors are based in an EU member state, and two are based in Europe outside the EU. The table is ordered by country.

With ISMS.online and Swiss GRC, your contracting party is a British or Swiss company. Our comparison of the best compliance software from Germany covers further Germany-based vendors, including caralegal and otris.

Which frameworks do the vendors list on their own websites?

The table counts which frameworks the 16 vendors listed as supported on their websites on November 2, 2026.

Most vendors list NIS2, ISO 27001, the GDPR, and the EU AI Act. TISAX, SOC 2, ISO 27701, and ISO 42001 split the field. Kertos and ISMS.online list the BSI C5 attestation as an available framework, and Proliance announces it as "bald verfügbar" (coming soon). Among the 14 vendors based in the EU, Kertos is currently the only one that lists C5.

How can you tell whether a European compliance platform is trustworthy?

You can tell by the facts you can verify yourself. Six questions are enough, and a document the vendor publishes or provides with its quote answers each one:

1. Who signs the contract? The company named in the data processing agreement counts, not the brand. You find its seat in the legal notice and the terms.
2. Who owns the vendor? The US CLOUD Act requires providers to disclose data in their "possession, custody, or control", explicitly regardless of whether the data is located inside or outside the United States (18 U.S.C. § 2713). Check the owners and the parent company in the commercial register, not just the data center location.
3. Who hosts, and who processes on the vendor's behalf? A trustworthy platform publishes its subprocessors with entity and location and announces changes.
4. Where does your data go when you use AI features? AI services usually run through separate subprocessors. Look for those entries in the list.
5. Which certificates does the vendor hold for itself? Count the certificates in the trust center, not the frameworks the product supports for customers.
6. Which person does the contract name? A mandate as external data protection officer or CISO is a contractual service with a name attached. A feature list is not.

The second question applies to European vendors too, because many run their platform on US cloud infrastructure. Kertos, for example, hosts with Amazon Web Services EMEA Sàrl in Luxembourg according to its subprocessor list, in data centers in Frankfurt according to its trust center. The difference from a US vendor therefore lies in the contracting party. Your contract is with Kertos GmbH in Munich.

Transfers to the US currently rely on the EU-US Data Privacy Framework. An appeal against the adequacy decision is pending at the Court of Justice of the EU as case C-703/25 P. The statutory authority for Section 702 FISA expired in June 2026, and surveillance continues under existing certifications until March 2027 (as of November 2, 2026). If your contracting party and its subprocessors process in the EU, no third-country transfer occurs at that level.

Which platform supports dual compliance with the GDPR and the EU AI Act?

Dual compliance usually means meeting the GDPR and the EU AI Act at the same time. 12 of the 16 vendors list both regulations on their websites: DataGuard, Kertos, heyData, Proliance, secjur, Dastra, Witik, Responsum, Cerivo, Cyberday, GlobalSuite, and ISMS.online.

A shared platform saves you from maintaining the same data twice. An AI system that processes personal data appears in the AI inventory and in the records of processing. The risk assessment under the EU AI Act and the data protection impact assessment draw on the same information about purpose, data categories, and risks. Our overview of EU AI Act compliance and AI governance tools shows where the obligations of the two regulations overlap.

When is a US vendor the right choice?

A US vendor fits when you need evidence mainly for the US market. Vanta states more than 35 frameworks and more than 400 integrations on its website, and Drata states more than 30 prebuilt frameworks. Both list SOC 2, HIPAA, PCI DSS, FedRAMP, and CMMC. OneTrust, headquartered in Atlanta, lists SOC 2, HIPAA, PCI DSS, and CMMC. For a SOC 2 Type II report for US customers, US federal contracts, or a tool stack made of US SaaS products, these vendors cover the frameworks those buyers require.

European frameworks rarely decide the choice anymore. Vanta and Drata list TISAX and NIS2, and Vanta also lists BSI C5 and the EU AI Act. Three other questions decide: whether you must appoint a data protection officer under Article 37 GDPR, whether your customer requires a contracting party in the EU, and whether you need named experts at your side in the audit.

Who is Kertos the best compliance software from Europe for?

Kertos is a European compliance platform run by Kertos GmbH, based in Munich with an office in Berlin. It combines software and the AI assistant Kaia with in-house certified experts.

Focus: technology companies from the scale-up stage into the mid-market, especially SaaS and fintech, that have to prove privacy and information security together. The certified experts take on mandates as external data protection officer and external information security officer and support you through audit and certification. Kaia accesses your compliance data, answers questions, and drafts documents.

Supported standards: GDPR, ISO 27001, ISO 27701, ISO 42001, NIS2, SOC 2, TISAX, C5, and the EU AI Act.

What sets it apart: Among the 14 EU-based vendors in this comparison, Kertos is the only one that lists the C5 attestation as an available framework. Your contracting party is Kertos GmbH; Kertos hosts with Amazon Web Services EMEA Sàrl in Luxembourg, in data centers in Frankfurt. Kertos itself holds ISO 27001 and ISO 42001 certification. More than 300 integrations connect the platform to existing systems.

Not a fit: Kertos does not fit if you only need a SOC 2 report for the US market or want a pure self-service tool without a named mandate. The expert component is part of the model.

Proof points: a 100% audit pass rate, around 80% less manual compliance effort, and 4.8 out of 5 stars from 65 reviews on G2 (as of November 2, 2026). Talk to one of our certified experts to clarify which evidence your company needs.

Frequently Asked Questions

Which all-in-one compliance platforms in Europe are considered trustworthy?

No ranking of trustworthiness exists, but you can apply criteria you can check: the contracting party and its seat, the owners, the published subprocessors, where AI features send data, the vendor's own certificates, and the people named in the contract. 13 of the 16 vendors in this comparison list the GDPR, ISO 27001, and NIS2 together. Six offer an external data protection officer in the same contract: Kertos, DataGuard, heyData, Proliance, secjur, and Witik.

How much do dual compliance platforms cost in Europe?

Of the 12 vendors that list both the GDPR and the EU AI Act, four publish an entry price: Witik a free Starter tier for the GDPR, heyData from €59 per month, Proliance from €118 per month, and Cyberday from €267 per month billed annually (as of November 2, 2026). The others quote prices on request, and so does Kertos, because the offer depends on the framework scope and company size. Check in the quote whether the entry tier covers both regulations.

Which European compliance platform lists the C5 attestation?

Two of the 16 vendors list the BSI C5 attestation as an available framework: Kertos, based in Munich, and ISMS.online, based in Brighton in the United Kingdom. Proliance announces C5 as "bald verfügbar" (coming soon). The US vendor Vanta also lists BSI C5. C5 is an attestation, not a certification; an auditor issues it after testing against the BSI criteria catalog.

Are there European alternatives to Vanta and Drata?

Yes, all 16 vendors in this comparison are based in Europe, and our comparison of EU alternatives to Vanta and Drata shows how they compare with those two.