FreeScout is a free, self-hosted OSS open source alternative to Zendesk and Help Scout — a help desk and shared inbox with unlimited agents (AGPL-3.0).
Yes, Freescout is open source under the AGPL-3.0 license.
Freescout is free to use.
Yes, Freescout can be self-hosted (the source is available under the AGPL-3.0 license).
FreeScout is a lightweight, free and open source (AGPL-3.0) help desk and shared inbox built in PHP/Laravel — a self-hosted, OSS open source alternative to Zendesk and Help Scout with unlimited agents, tickets and mailboxes, plus email, live chat and messaging channels.