EU Sovereignty Score
EU sovereignCaptcha & Bot DetectionHeadquarters: DE

Lemin CAPTCHA: sovereignty score and 8 European alternatives

Lemin CAPTCHA is a bot-protection service that replaces classic image challenges with game-style puzzles, intended to block bots and brute-force attacks while remaining easy for people to pass. Website owners add a JavaScript tag and can style the challenge to match their brand. A Shopify app is offered for online shops, and the service is delivered as a hosted solution integrated through that JavaScript tag.

The operator, Lemin GmbH, has its registered seat in Cologne, Germany, so it is a German company subject to EU law and the GDPR. The vendor's imprint identifies the company and its legal form, but it does not state where captcha data is hosted or offer a data processing agreement. European buyers should therefore ask for the hosting location and the processing terms before deployment.

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Sovereignty score
71 / 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-360
    Key management with a European vendor
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-655
    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 11, 2026
Headquarters
DE (EU)Verified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
EUVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
NoVendor-stated
Category
Captcha & Bot Detection
Type
Product
Website
lemin.ai ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Lemin CAPTCHA

The European alternatives to Lemin CAPTCHA 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

15 European Captcha & Bot Detection 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 Lemin CAPTCHA

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

Data is hosted exclusively in the EU, so Lemin CAPTCHA scores best on data residency.

Lemin CAPTCHA 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 Lemin CAPTCHA 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 Lemin CAPTCHA?

It depends on your use case. Strong EU alternatives to Lemin CAPTCHA include ALTCHA, ALTCHA Sentinel and Atmosvere. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Lemin CAPTCHA?

Yes. Open-source EU alternatives to Lemin CAPTCHA include ALTCHA and CaptchaService (Stad München). These keep your data fully under your own control and let you self-host if you want to.

Is Lemin CAPTCHA GDPR-compliant and where is the data hosted?

Lemin CAPTCHA is headquartered in DE (EU) and hosts data in EU. That makes Lemin CAPTCHA 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 11, 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 Captcha & Bot Detection

Captcha & Bot Detection: Services that detect whether a real user or bot is visiting a website. 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 Lemin CAPTCHA — GDPR-compliant & EU-hosted · EU Sovereignty Score