EU Sovereignty Score
Self-hosted / open sourceCaptcha & Bot DetectionHeadquarters: CH

mosparo: sovereignty score and 8 European alternatives

mosparo is an open-source form-spam protection system that replaces a traditional captcha. Visitors do not have to solve a puzzle, calculation or symbols; a single click is enough. mosparo checks submitted form data for spam, using only the form data, the IP address and the user agent. No cookies are used. Data is encrypted before storage, IP addresses are hashed and form data is deleted automatically after 14 days. The solution supports screen readers and operation by mouse, keyboard and touch. You install mosparo yourself on ordinary web hosting or with Docker; the website does not mention a hosted service.

The source code is licensed under the MIT licence. mosparo is maintained by the mosparo Association, a non-profit based in Switzerland; the developers work on it in their spare time. Switzerland is not an EU member state but belongs to EFTA. There is no non-European parent company. Because you host mosparo yourself, you decide where data is processed, with no external API calls to a third party.

See the 8 European alternatives ↓Assess your stack with mosparo pre-selected
MastodonLinkedInBlueskyXEmail
Sovereignty score
94 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in Switzerland: Swiss law, recognised by the EU as adequate
  • Data residency SOV-3100
    EU-only hosting
  • 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-6100
    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 October 4, 2026
Headquarters
CH (EU)Verified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
EUVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Category
Captcha & Bot Detection
Type
Product
Website
mosparo.io ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to mosparo

The European alternatives to mosparo 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

Is mosparo 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 mosparo

mosparo is headquartered in Switzerland and falls under Swiss law, including the revised Swiss data protection act. Switzerland is not an EU member, but the European Commission recognises its level of data protection as adequate. Its Swiss headquarters does not by itself bring it under US legislation such as the CLOUD Act.

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

mosparo 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 mosparo 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 mosparo?

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

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

mosparo is headquartered in CH (EFTA) and hosts data in EU. It is also open-source, so you can self-host it. That makes mosparo 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 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 mosparo — GDPR-compliant & EU-hosted · EU Sovereignty Score