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Everything about help desk.
2 guides on this topic, newest first.

Teamwork6 min read
How to run a help desk for a small team
How to run a help desk for two to ten people: one queue, clear owners, reply targets, saved replies and a few numbers worth watching.
Comparisons and alternatives5 min read
Zendesk alternatives for small business
Zendesk alternatives for small business compared: Freshdesk, Help Scout, Zoho Desk, HubSpot and nerix. Prices, free plans, strengths and limits.