https://www.boardroomchurch.com/guidelines-with-data-room-pricing/

It is often difficult to compare pricing when choosing the right virtual dataroom (VDR) that is suitable for your team. Some VDRs offer a set, monthly cost that includes access for all users storage space, features and other features. Others charge by the page or per user, and other VDRs have pricing structures that is based on the number of gigabytes that are used by the VDR. It’s like comparing prices for the items on the menu at a buffet, from apple pie and duck a.la. orange to a myriad of other meals.

Many VDRs use a page-based price model. They charge between $0.40 and $0.885 per page. Overage fees are charged when the number of pages exceeds an agreed limit. While this may be an ideal option for smaller projects that have a clear and defined number of documents, it can result in costly invoices for larger projects containing unstructured documents and files.

Some providers also charge depending on the amount of storage the VDR uses, with any overages adding up to $75 per GB. This is a good choice for teams that have the same number of users and consistent document sizes as opposed to a project-based model in which cost varies based on the length of the project.

Other providers offer an arranged pricing structure which offers different features at fixed costs. This is ideal for teams with a fixed budget and need an scalable platform that permits them to increase or decrease access to and storage space as their needs change.