Zulipchat offers free SaaS for open source projects and also provides you with the ability to export your data and choose to self host at any time in the future

Zulipchat offers free SaaS for open source projects and also provides you with the ability to export your data and choose to self host at any time in the future. I've found it to be superior to Slack but it just doesn't have the same level of name recognition and thus people are less inclined to use it for some reason. I hope this builds into a real campaign to have free software projects choose a more ethical alternative.