Looking for a secure project management platform for our group to use [closed]


Our group is a non-profit (most of us are volunteers) with a limited budget doing community awareness on the topic of safe technology use to support health and safety.

We are looking for a project management platform that is safe, secure (data encrypted?), and has a good track record of not having any past security breaches. We need the platform to organize our meetings and activities, as well as facilitate our information and document sharing.

We are looking for project management platform options that have measures in place that would make it difficult, if not impossible, for others to steal information/documents and/or take note of what we are doing/sharing.

Any suggestions on where to look?