What are some alternatives?
When comparing SLIM21 and Alma, you can also consider the following products
LIBRARIAN - Comment on any arXiv paper
Gradelink - Gradelink is a cloud-based student information system and school management system that makes classroom management simpler and administrative tasks easier.
Eloquent Library - Eloquent Library contains all the functions available in traditional Integrated Library Systems, plus everything required to build and maintain a virtual library.
PraxiSchool - PraxiSchool is a school management solution that helps track staff time and clock children in and out of daycare.
LibraryH3lp - LibraryH3lp provides a flexible, affordable customer service software platform for libraries, educators, and non-profits that combines website chat, texting, email, and knowledge bases.
PowerVista RollCall - On premise campus management and administration solution