Open Source Helpdesk
A help desk is where customer trust gets spent or saved, and the quiet cost is the data inside it - every ticket is a record of who your customers are and what breaks for them, which is exactly the history a per-agent SaaS plan keeps hostage as your volume grows. The open source tools here run the same shared inbox, ticketing, and canned-reply workflow on your own server, so support history and customer contact data stay in a database you can query, migrate, and never get priced out of.
Chatwoot
Open-source customer support platform for live chat, email, and omnichannel inboxes
UVdesk
Open-source helpdesk for support tickets, email piping, workflows, and knowledge base portals
Zammad
Web-based open-source helpdesk for customer support across email, chat, telephone, and social media
Fider
Feedback portal for collecting feature requests and suggestions, with voting to prioritize product direction
FreeScout
Free self-hosted help desk and shared inbox, a Zendesk and Help Scout alternative
osTicket
Open source support ticket system for managing email, phone, and web requests in one web interface
Frappe Helpdesk
Open-source ticket management software with agent and customer portals, SLAs, and automation
Peppermint
Self-hosted ticket management and help desk system with markdown tickets and a client history log
EspoCRM
Open-source CRM for managing contacts, sales, support, and marketing with a PHP REST API