The geni.com website is considered one of the world’s largest cooperatively built platforms for genealogy. Users first prepare profiles of themselves, their parents, siblings, and other related persons with names, life data, and other information, creating individual family trees in each case. Profiles of the same person in different family trees can be merged, with the associated family trees also being linked to form a common family tree. This process is different from MyHeritage or Ancestry, where the family trees are supplemented accordingly, but remain independent.
You have to be very careful with the data in profiles and make sure the information about the sources is clear. Since 2016, the author of this website, Sharon Meen, has been preparing profiles for the 513 Thuringian Jews and their family members. These profiles usually have all sources identified and her name identified as a manager of the profile. Here is an example: