Non-EU vendorFintech & NeobanksHeadquarters: GB

Tandem: sovereignty score and 8 European alternatives

Tandem is a UK digital bank that works through a mobile app. It offers instant-access and fixed-term savings accounts, including cash ISAs, as well as home loans, home improvement loans and motor finance arranged through brokers, partners and dealerships. Tandem describes itself as a greener digital bank and runs a Green Hub for products such as solar panels and heat pumps. Tandem Bank Limited is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority.

Tandem is headquartered in Blackpool, England, and is a wholly owned subsidiary of Tandem Money Ltd. Both the bank and its parent are therefore based in the United Kingdom, outside the EU, and fall under UK rather than EU banking supervision. The bank does not state where it hosts customer data. It is a proprietary commercial service with no open-source or self-hosting option. For a European organisation or individual, the banking relationship is governed by UK law and UK supervision.

See the 8 European alternatives ↓Assess your stack with Tandem pre-selected

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Sovereignty score

42 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-250
Headquartered outside the EU (GB)
Data residency SOV-350
Hosting inside and outside Europe (EU, OTHER)
Cryptographic key sovereignty SOV-340
Key management with a non-European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-630
Closed source, runtime with the vendor

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 5, 2026

Headquarters	GB (OTHER)Verified by hand
EU adequacy decision	Yes — found adequate by the European CommissionVerified by hand
Sovereignty model	Vendor-hosted (non-EU)Verified by hand
Data hosting	EU, OTHERVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Category	Fintech & Neobanks
Type	Product
Website	tandem.co.uk ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Tandem

The European alternatives to Tandem 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

116 European Fintech & Neobanks 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 Tandem

Tandem 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.

Tandem hosts data in EU, OTHER. Exactly what stays within the EU — and what does not — is defined by the vendor's data processing agreement and sub-processor list, not by a setting you control yourself; check those documents for the precise scope, including backups, logs and support access.

Tandem is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

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

It depends on your use case. Strong EU alternatives to Tandem include 1822direkt, ActivoBank and Air Bank. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Tandem?

Our list of EU alternatives to Tandem is mostly commercial options. Browse the category on the map for open-source choices.

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

Tandem is headquartered in GB (OTHER) and hosts data in EU, OTHER. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. 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 October 5, 2026.

Sources

Public sources used in the latest check of this record.

tandem.co.uk/

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 Fintech & Neobanks

Fintech & Neobanks: Digital banks, neobanks, money transfers and fintech services. 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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