LimeSurvey (PHPSurveyor) is a free and open source on-line survey application written in PHP based on a MySQL, SQLite, PostgreSQL or MSSQL database, distributed under the GNU General Public License. Developed by Carsten Schmitz / The LimeSurvey team
License: Open Source
LimeSurvey offers a more customizable and feature-rich environment, making it suitable for users who require extensive survey logic and flexibility. In contrast, FluidSurveys is more user-friendly and better suited for teams looking for straightforward survey solutions with strong support.