EU Sovereignty Score
Non-EU vendorFeature Flagging & ExperimentationHeadquarters: GB

Flagsmith: sovereignty score and 8 European alternatives

Flagsmith is a feature flag and remote configuration platform. Teams manage flags for web, mobile and server-side applications, target them by environment, user, segment or percentage, run A/B and multivariate tests, change values without a deployment, and keep an audit log with rollback. The platform is offered as a hosted cloud, as a fully managed private cloud, or as a self-hosted installation, on-premises or in your own cloud, with Helm and OpenShift options.

Flagsmith is operated by Bullet Train Limited, a company registered in London. Most of the platform is open source under the BSD-3-Clause licence; the self-hosted edition is free to run, alongside a supported Enterprise edition. According to Flagsmith, its cloud is spread across eight regions worldwide, and a private cloud can be placed in a region of the customer's choice; the privacy policy names AWS as a processor. The United Kingdom is outside the EU. Organisations that want full control over location and jurisdiction can choose self-hosting or a private cloud.

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Sovereignty score
57 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-250
    Headquartered outside the EU (GB)
  • Data residency SOV-30
    No hosting in Europe (GB)
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-665
    Source code auditable, forkable and self-hostable

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 September 27, 2026
HeadquartersGB (OTHER)Verified by hand
EU adequacy decisionYes — found adequate by the European CommissionVerified by hand
Sovereignty modelVendor-hosted (non-EU)Verified by hand
Data hostingGBVerified by hand
Open-sourceYesVerified by hand
GDPR-compliantNoVendor-stated
Hosting signalCLOUDFLARESPECTRUM - Cloudflare London, LLC, US (US)Technically measured
CategoryFeature Flagging & Experimentation
TypeProduct
Websiteflagsmith.com ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Flagsmith

The European alternatives to Flagsmith come from our knowledge base of over 6,800 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

12 European Feature Flagging & Experimentation 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 Flagsmith

Flagsmith is headquartered in GB, outside the EU. Contracts and data therefore also fall under non-European law. The GDPR applies through contractual terms, but in a conflict with local legislation you have less certainty than with a European vendor.

Flagsmith hosts data outside the EU (GB). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

Flagsmith is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Flagsmith 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 Flagsmith?

It depends on your use case. Strong EU alternatives to Flagsmith include AB Tasty, ABsmartly and Reflag (Bucket). On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Flagsmith?

Yes. Open-source EU alternatives to Flagsmith include ConfigCat and FeatBit. These keep your data fully under your own control and let you self-host if you want to.

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

Flagsmith is headquartered in GB (OTHER) and hosts data in GB. Its GDPR compliance is limited or unclear. For full EU data residency the EU alternatives on this page usually offer more certainty.

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 September 27, 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 Feature Flagging & Experimentation

Feature Flagging & Experimentation: Runtime feature toggles, gradual rollouts and A/B testing infrastructure for software teams. 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.

Also in this category

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8 European alternatives to Flagsmith — GDPR-compliant & EU-hosted · EU Sovereignty Score