Our local PSL chapter used a private Nextcloud instance for most organizing efforts. For what it's worth, PSL national did start up an IT security protocol that chapters were supposed to be moving towards, with detailed guides for setting up various online infrastructure in a secure way. Out of all the socialist orgs I've been a member of, the PSL has ultimately been the one most interested in tightening digital security. DSA is Google Docs central (and Slack). SRA is Discord all the way down.
Our local PSL chapter used a private Nextcloud instance for most organizing efforts. For what it's worth, PSL national did start up an IT security protocol that chapters were supposed to be moving towards, with detailed guides for setting up various online infrastructure in a secure way. Out of all the socialist orgs I've been a member of, the PSL has ultimately been the one most interested in tightening digital security. DSA is Google Docs central (and Slack). SRA is Discord all the way down.