Best open-source alternatives to Zendesk

Chatwoot is a self-hosted customer support platform aimed at businesses that want a centralized inbox for customer conversations. It positions itself as an open-source alternative to products like Intercom and Zendesk, and it is designed to help teams handle support at scale while retaining control over customer data. The platform combines omnichannel messaging, a help center, collaboration tools, and reporting in one system. It supports channels such as website chat, email, and multiple social or messaging services, while also offering features like assignments, canned responses, labels, automation, and team workflows. The README also highlights Captain, an AI agent intended to automate routine support interactions and reduce agent workload.

UVdesk Community is an open-source helpdesk platform built on Symfony and Backbone.js. It is intended for organizations that need a customizable customer support system with ticket management, email-to-ticket conversion, and a support center portal. The project is structured as a helpdesk skeleton with core, extension, automation, mailbox, and support center components. The README highlights features such as multilingual support, unlimited agents and teams, saved replies, filtering, automated workflows, knowledge base content management, and multiple attachments. It also provides installation paths through Composer or a downloadable archive, plus terminal-based or web-based configuration. The software appears aimed at teams that want to self-host and extend their support desk rather than use a fixed SaaS product.

Zammad is a web-based helpdesk and customer support platform designed to help teams manage customer inquiries in one place. It is aimed at organizations that handle requests across multiple communication channels and want a centralized system for support operations rather than scattered email threads or ad hoc coordination. The README presents Zammad as open source software under GNU AGPLv3 and notes that it is developed by Zammad GmbH together with the community. It can be obtained through source code, Docker images, Helm charts for Kubernetes, and packaged DEB/RPM downloads. The project also points users to official documentation, screenshots, and a REST API for integration, while highlighting a hosted cloud service as an easier operating option.

FreeScout is an open source help desk and shared inbox application intended as a self-hosted alternative to Zendesk and Help Scout. It is built with PHP and the Laravel framework, and is designed for organizations that want a lightweight customer support system they can run themselves while keeping data under their own control. The project emphasizes broad usability and deployment flexibility. The README highlights mobile-friendly access, multilingual support, email integration, conversation management tools, notifications, and accessibility features. It also points to mobile apps, official and community modules, and external integrations such as an API, Zapier, and Make, suggesting a platform that can be extended for support teams and administrators.

Frappe Helpdesk is an open-source customer support and ticket management application built for organizations that want a customizable helpdesk system. It is presented as a modern alternative to ERPNext’s support module, emphasizing easier setup, a cleaner interface, and automation for handling customer queries. The project provides separate experiences for agents and customers, along with features such as SLA management, ticket auto-assignment, a knowledge base, and saved replies. It is built on the Frappe Framework and uses Frappe UI for the frontend. The README also describes both managed hosting through Frappe Cloud and self-hosted deployment options, making it suitable for teams that want either a hosted or self-managed helpdesk setup.

Peppermint is a ticket management system aimed at helpdesks and service desks that need a straightforward way to handle internal staff and customer requests. It presents itself as a lightweight, easy-to-use product with a simple workflow and a responsive interface that scales from mobile devices to large screens. The project includes core support features such as ticket creation, markdown-based editing, file uploads, client history tracking, and a notebook area with todo lists. It is designed for self-hosted deployment and provides a Docker-based setup, plus a one-line installer for Ubuntu and Debian. The README also points users to official documentation and notes default login credentials for the initial setup.

Request Tracker (RT) is an open source, enterprise-grade issue and ticket tracking system aimed at organizations that need to manage work items, responsibilities, and progress. It helps teams keep track of what needs to be done, who is working on each task, what has already been completed, and whether items are overdue or still pending. The project is designed for self-hosted deployment and provides detailed installation and upgrade instructions, including database setup, web server integration, and dependency checks. It supports several SQL databases and common web servers, and it can be configured either through a web installer or manually via configuration files. The README also highlights production-oriented features such as full-text indexing support, relationship graphing, and dashboard email generation with charts.

ITFlow is a free, open-source platform designed for small managed service providers that need to keep client information, support work, and billing in one place. It targets teams that manage many assets, contacts, documents, tickets, and financial tasks for clients and want a more organized alternative to fragmented tools. The project combines documentation, ticketing, and accounting features into a single self-hosted system. The README highlights a client portal for self-service quote, invoice, and ticket management, along with alerting for items such as account balance, invoice status, and domain or SSL renewals. It also points users to a public demo, documentation, and a managed hosting option, while emphasizing that the software is distributed under the GPL.

OTOBO is a web-based open-source ticketing system aimed at service organizations such as IT helpdesks, customer service centers, and call centers. It is presented as a flexible platform for managing communication and support workflows, with a focus on classical ticket handling and extensibility. Beyond core ticketing, the project includes a knowledge base/FAQ function, support for process automation, and an ITSM component with a CMDB for tracking IT assets and other items. The README also emphasizes that the system can be heavily customized, and it is backed by professional services from the vendor for organizations that want assistance with deployment, adaptation, or managed operation.