ProofHub

ProofHub is an all-in-one project management and team collaboration software with a simple flat-rate pricing model. It combines task management (Kanban, Gantt), discussions, proofing tools for visual feedback on files, chat, calendars, and announcements. Its online proofing feature is a standout for design and marketing agencies, allowing stakeholders to mark up designs directly. The flat fee covers unlimited users and projects, making it predictable for growing teams.

It lacks advanced time tracking or invoicing but excels as a centralized collaboration hub. It ranks as a great value option for agencies that need robust proofing and want to avoid per-user fees.