LimeSurvey is an open source software (OSS) company. However, what does this mean for the general public? In short, it can be defined as "[...] software that can be freely used, changed, and shared (in modified or unmodified form) by anyone. Open source software is made by many people, and distributed under licenses that comply with the Open Source Definition."
(Source: Open Source Initiative
OSS, which essentially consists of source code, is made openly available by whoever holds the original copyright. Based on a certain license agreement, the software can be used, changed or distributed by anyone, meaning it provides the opportunity to use it freely without any restrictions.
In this context, the software is usually not only developed by a core project team or company, but by anyone who wants to contribute to the maintenance and improvement of the software’s features. The consequence is a collaborative creative process that drives the product development forward in an efficient and high-quality manner.
Open source projects are ultimately protected and promoted by the global non-profit Open Source Initiative
Antonym of OSS is closed source proprietary software which refers to conventionally licensed software with the licensee being very limited in the range of applications. The software’s publisher usually owns the intellectual property rights, i.e. foremost the source code copyright which restricts the use, inspection, modification and distribution of the software. This grants exclusive rights to those people willing to pay for using the software product.