Is your open source project still using Slack for its community? Consider:
Mozilla has migrated their chat to Matrix: https://wiki.mozilla.org/Matrix
Mattermost now offers hosted service with special pricing for OSS projects: https://mattermost.com/nonprofit/
There are probably even more I'm not aware of.
There are good Free options now. Time to get out of the proprietary SaaS lock-in.
@nivex Note that one big reason that Matrix got Mozilla's vote was that they are - by a wide margin - the strongest option out there in terms of community safety and accessibility.
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