mosparo — Self-Hosted, Open-Source

The modern spam protection tool. It replaces other captcha methods with a simple and easy to use spam protection solution.

License: MIT. Built with: PHP, Twig, JavaScript, SCSS, CSS, Dockerfile, Shell. Website: https://mosparo.io/. Source: https://github.com/mosparo/mosparo.

Features

mosparo only uses the data which the user has entered in the form, the IP address of the user, and the user agent of the browser but does not collect other data
All user data are encrypted by default
All collected data are deleted in a fixed time interval. All data will be deleted after 14 days (maybe 15 days because of cronjob execution and so on)
Usable for everybody: the mosparo spam protection method does not use puzzles or obscured images to protect the form.
Open-source and self-hosted
The checkbox is customizable in size and the color

Installation

git clone [email protected]:mosparo/mosparo.git

Why self-host mosparo

Self-hosting gives you three things SaaS can’t: data ownership (the files live on disks you control), cost predictability (a one-time setup vs. recurring per-seat fees that grow with your household or team), and longevity (open-source means the app keeps working even if the maintainers move on, since you can pin a working version). The trade-off is that you take on the operational work of running a server, applying updates, and handling backups.

Hardware notes

Less than 100 MB of disk space

Where to go from here

Last verified: 2026-05-22