It's never easier to find a Gantt online. But whether it really suits you, depends on your team's needs. Teamweek is designed for a team who uses rough planning in order to stay flexible.
The easiness of changing plans cannot be found in any Gantt online. Only a few product founders have understood how important flexibility really is and how important it is to allow that in their tools.
Invite your team to join and start assigning tasks. When you need to make changes, just drag and drop to rearrange the Gantt online.
Hold cmd (ctrl for PC) while dragging the task to duplicate it.