Dear Neida, I moved this question to this category “Survey and data collection”. In Germany, we used unipark, a tool that is provided by questback (https://www.unipark.com/en). This tool has the advantage, that is meets the requirement of the General Data Protection Act (GDPR), such as secure data transmission, declaration of consent before the start of the questionnaire etc. Moreover, it perfectly meets the needs by researchers (e.g. easy export funtion to spss including all labels, monitoring, different forms of items/scales). However, each partner can use tool that is available at their university. We also worked with survey monkey in another project and it worked well. Other colleagues use lime survey. Would love to read about the experience of using other tools here.