EU Sovereignty Score
Non-EU vendorWriting Assistance & GrammarHeadquarters: US

Copyleaks: sovereignty score and 8 European alternatives

Copyleaks is a service for checking text for plagiarism and for content generated by artificial intelligence. Users analyse documents through the web application or through an API. The product is offered by the company of the same name, which according to Wikipedia has its headquarters in New York. It is a hosted service.

The company was founded in 2015 by Alon Yamin and Yehonatan Bitton; its ownership is not stated in the sources consulted. Because its headquarters are in the United States, US law such as the CLOUD Act can apply. For European customers, the company offers copyleaks.eu, with servers in Germany, so that processing stays within Europe. The company states that it is committed to the GDPR. European organisations processing sensitive documents should check the data processing terms, including where backups are kept, which the consulted source does not specify.

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Sovereignty score
27 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-210
    Headquartered in the US: CLOUD Act and FISA 702
  • Data residency SOV-350
    Hosting inside and outside Europe (US, EU)
  • Cryptographic key sovereignty SOV-320
    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-615
    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 10, 2026
HeadquartersUS (US)Verified by hand
EU adequacy decisionOnly for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty modelVendor-hosted (non-EU)Verified by hand
Data hostingUS, EUVerified by hand
Open-sourceNoVerified by hand
GDPR-compliantYesVendor-stated
CategoryWriting Assistance & Grammar
TypeProduct
Websitecopyleaks.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Copyleaks

The European alternatives to Copyleaks come from our knowledge base of over 6,200 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

19 European Writing Assistance & Grammar 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 Copyleaks

Copyleaks is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.

Copyleaks hosts data in US, EU. 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.

Copyleaks 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 Copyleaks 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 Copyleaks?

It depends on your use case. Strong EU alternatives to Copyleaks include CKEditor, Congree and DeepL Write. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Copyleaks?

Yes. Open-source EU alternatives to Copyleaks include CKEditor, Grammalecte, Kate and LanguageTool. These keep your data fully under your own control and let you self-host if you want to.

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

Copyleaks is headquartered in US and hosts data in US, EU. 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 10, 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 Writing Assistance & Grammar

Writing Assistance & Grammar: Grammar checking, spell checking, style advice and AI writing assistants. 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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8 European alternatives to Copyleaks — GDPR-compliant & EU-hosted · EU Sovereignty Score