mosparo on Ubuntu 24.04 LTS

Overview

mosparo is an open source, self hosted spam protection service for web forms. Instead of asking a visitor to solve a puzzle or identify traffic lights, it analyses the content that was actually submitted against configurable rules and spam signals, so a genuine visitor usually sees nothing more than a small confirmation box. You create a project in the mosparo interface, embed its lightweight frontend script in your form, and your backend verifies each submission against your own instance using that project's public and private keys.

Because the instance is yours, form submissions are never sent to a third party and no tracking or fingerprinting scripts are placed on your visitors. That makes it a practical answer for organisations that need effective spam filtering on contact, registration, comment and newsletter forms while keeping their data protection posture defensible. It ships integrations for common content management systems and form builders, plus a documented API for anything custom.

Common uses

• Protect contact, registration and comment forms from spam without showing visitors a puzzle
• Replace a third party captcha with a service you host yourself, so submissions never leave your infrastructure
• Give several sites and applications their own protected projects and API keys from one instance

See it running

Real screenshots taken while testing this image against its deployment guide.