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ClickUp is a collaboration platform that brings project management, docs, chat, whiteboards, time tracking and an AI assistant (Brain) together in a single workspace, with the goal of replacing a scattered set of tools. Its website says it offers a free-forever plan and supports AI Agents that handle tasks automatically.

Todoist is a cross-platform task management and to-do list app that lets you capture tasks quickly in natural language and organize them by date, project and filter. It works for both personal use and team collaboration.