It's free no matter how long you use it.
Features of the Free Plan
Up to 10 people can use it for an unlimited period of time.
As much functionality is available as the starter.
You can use the environment you have built for free at the time of this contract.
|Number of accounts||10|
|Number of groups||unlimited|
|1 file upload limit||~30MB
In the case of Free Plan/Starter Plan, it has been modified so that only one content can be uploaded for a large amount of material (30 MB to 500 MB file).