EU Sovereignty Score
Non-EU vendorCaptcha & Bot DetectionHeadquarters: US

MTCaptcha: sovereignty score and 8 European alternatives

MTCaptcha is an enterprise captcha and bot-protection platform. According to the vendor, it stops automated threats without capturing personal data. You add a script tag and an element to your form; the widget uses adaptive, invisible verification and your backend checks the returned token with your private key. The widget is loaded from MTCaptcha's servers. The vendor claims WCAG 2.1 AAA accessibility, with screen-reader support and audio, and states a SOC 2 Type 2 attestation and GDPR compliance.

MTCaptcha is offered by Sun Spray Technologies LLC, based in Mountain View, California, and is therefore subject to US jurisdiction, including the CLOUD Act. The service is not open source. The vendor describes a decentralised architecture with data centres worldwide, but the pages consulted name no hosting regions. For transfers of EU data, MTCaptcha points to certification under the Data Privacy Framework. European organisations should assess for themselves whether that is sufficient.

See the 8 European alternatives ↓Assess your stack with MTCaptcha pre-selected
MastodonLinkedInBlueskyXEmail
Sovereignty score
17 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-210
    Headquartered in the US: CLOUD Act and FISA 702
  • Data residency SOV-30
    No hosting in Europe (US)
  • 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 4, 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 hostingUSVerified by hand
Open-sourceNoVerified by hand
GDPR-compliantYesVendor-stated
CategoryCaptcha & Bot Detection
TypeProduct
Websitemtcaptcha.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to MTCaptcha

The European alternatives to MTCaptcha 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

15 European Captcha & Bot Detection vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is MTCaptcha one of many dependencies?

Score your whole stack in about three minutes. Free, no account needed.

Assess your stack →View a sample report (opens in a new tab)

Why digital sovereignty matters with MTCaptcha

MTCaptcha 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.

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

MTCaptcha 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 MTCaptcha 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 MTCaptcha?

It depends on your use case. Strong EU alternatives to MTCaptcha 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 MTCaptcha?

Yes. Open-source EU alternatives to MTCaptcha 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 MTCaptcha GDPR-compliant and where is the data hosted?

MTCaptcha is headquartered in US and hosts data in US. 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 4, 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.

Also in this category

See all →
Open in the alternatives dashboardMissing a vendor? Submit itAre you this vendor? You can also become a sponsor on the Captcha & Bot Detection page — with no effect on your score
8 European alternatives to MTCaptcha — GDPR-compliant & EU-hosted · EU Sovereignty Score