Zammad
A web helpdesk and ticketing system.
Open source alternative toZendesk
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Chatwoot
A shared inbox and live chat for customer support across email, chat and social channels.
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UVdesk
A helpdesk and ticketing system for customer support.
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FreeScout
A free help desk and shared mailbox.
Alternative to Help Scout, Zendesk
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Frappe Helpdesk
A customer support tool with tickets, a knowledge base and agent tools.
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Twenty
A modern CRM that you can customise and host yourself.
Alternative to HubSpot, Salesforce
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Monica
A personal CRM: remember the people in your life.
CRM and support
About these numbers. Stars, dates and licenses come from GitHub through ecosyste.ms, collected on 10 Nov 2026; they can lag GitHub by a few days. A project is listed only if it has 300 or more stars, was updated in the last 12 months and states a license. A listing is not an endorsement, and we have not tested these tools on Antideploy yet. Logos belong to their projects and companies and are shown only to say which is which.