There are multiple reasons why, but let's concentrate on the main ones:
Simplicity. You can create a client portal in a couple of clicks, providing your clients with an intuitive design and easily-reachable information.
Security. You choose who can access and edit information in your company portal.
Efficient collaboration. You manage your project inside the Nimbus workspace with your team, show clients the results of this work, and collaborate with them further in the portal.
Cost-worthy. You can replace multiple tools for collaboration, communication and project management using just Nimbus Platform and its portals.