Allowing people to work together on the same document is arguably more important for producing a presentation than a textual document or a spreadsheet. Certainly more than one person often contributes to these other types of document, but commonly by passing the document back and forth, aided and abetted by features like commenting and tracking changes. This is a good way of working, but for a presentation, especially if multiple people are going to present it then a more immediate way of collaborating could be beneficial.
Of the products reviewed here, only Google Slides, being a cloud-based utility, has specific facilities for collaboration. Having created a presentation you can invite people to collaborate, granting them view, comment or edit access. Users who are online at the same time can use a chat facility and can also make changes at the same time.