Self-hosted / open sourceData Governance & MDMHeadquarters: NL

Syntho: sovereignty score and 8 European alternatives

Syntho is an Amsterdam-based company that provides a platform for synthetic test data, so that organisations can develop and test without copying production data. The platform offers three approaches: masking existing data, generating data from predefined rules, and using AI to produce data that mirrors the statistical patterns of the source. Syntho states that the software is deployed in the customer's own environment and that it has no access to that data. Since June 2026 the company also holds the MOSTLY AI brand, which continues as "MOSTLY AI, powered by Syntho".

Syntho is headquartered in Amsterdam, and its website names no parent company or foreign majority owner. Because the software runs inside the customer's infrastructure, the data's location is set by the customer's hosting choices rather than by a vendor cloud. The privacy policy refers to the GDPR and to processor agreements. The website describes no open-source edition. For a European organisation, Syntho is therefore a self-hosted option within the European legal framework, though actual exposure depends on the customer's configuration.

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Sovereignty score

80 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-2100
Headquartered in the EU: European law applies
Data residency SOV-3100
EU-only hosting
Cryptographic key sovereignty SOV-380
Closed source, but self-hostable: encryption keys and runtime under your own control
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-680
Closed source, but self-hostable on your own infrastructure

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked October 12, 2026

Headquarters	NL (EU)Verified by hand
Data hosting	Self-hosted, e.g. in EU (your choice)Verified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Category	Data Governance & MDM
Type	Product
Website	syntho.ai ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Syntho

The European alternatives to Syntho come from our knowledge base of over 7,800 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

23 European Data Governance & MDM vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

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Why digital sovereignty matters with Syntho

Syntho is headquartered in NL and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Syntho runs on infrastructure you choose and control yourself. You decide where the data lives, including fully within the EU if you want — this is not a fixed hosting choice made by the vendor.

Syntho is closed source, but you run the software yourself on your own infrastructure. The encryption keys and the runtime therefore stay under your own control, though you cannot audit or modify the source code. Ask about export options and open standards to limit software-level lock-in.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Syntho together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to Syntho?

It depends on your use case. Strong EU alternatives to Syntho include Accutics, Amnesia and Anjana Data. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Syntho?

Yes. Open-source EU alternatives to Syntho include Amnesia, ARX Data Anonymization Tool and Data Contract CLI. These keep your data fully under your own control and let you self-host if you want to.

Is Syntho GDPR-compliant and where is the data hosted?

Syntho is headquartered in NL (EU) and hosts data in EU. That makes Syntho an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on October 12, 2026.

Sources

Public sources used in the latest check of this record.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in Data Governance & MDM

Data Governance & MDM: Data catalogues, lineage, data quality, ownership and master data management. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

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