Captcha services

mosparo

Open source spam protection for web forms

SwitzerlandEFTAOpen sourceEU controlled

mosparo is an open source spam protection system for forms. It catches spam submissions before they reach your inbox and is designed to be usable by everyone except robots: it works with screen readers and with mouse, keyboard or touch input, so nobody is locked out by an unreadable puzzle. The project comes from Switzerland and is released under the permissive MIT licence.

mosparo is self-hosted, so it is not necessarily European: you can host it anywhere, including on a server in the EU, where it becomes a free European alternative to the American captcha services. It suits site owners who care about accessibility as much as about spam.

External verification

EU verification badge

eu-alt.eu independently verified this service's European ownership. Choose a badge style and link it back to the dated evidence on this page.

Evidence last checked:

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Data and operations

Infrastructure and email path

Verified operational dependencies, shown separately from ownership and from the service's core data hosting.

Public website

Vultr

Non-European provider
Observed
A 104.238.176.147, 178.62.23.196, 185.19.29.108 · AS20473

Why this matters

Public DNS routes website visits through Vultr. Visitor IP addresses and request metadata can reach this non-European provider; this does not identify the core service's data location.

Incoming business email

zepi.network

Provider control not verified
Observed
MX 10 mail.zepi.network

Authorised outbound email

Direct or undisclosed mail senders

Provider control not verified
Observed
SPF v=spf1 a mx ~all

Public DNS records identify visible providers and routes, not every backend location or private data-region setting.

Infrastructure checked:

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