With nearly 3,900 GitHub stars, over 1,800 forks, and continuous development since 2013 culminating in the v1.18.4 release in June 2026, osTicket remains one of the most deployed open-source help desk systems worldwide, trusted by organizations from small businesses to universities and government agencies. The PHP backend on Apache or IIS with MySQL stores every ticket, response, and attachment while the web interface provides separate agent and customer portal views with role-based access control across departments, teams, and individual agents. Customers submit tickets through web forms, email piping, or phone-entry by agents, and configurable ticket filters automatically route incoming requests to the correct department, assign agents or teams, set priority levels, apply SLA plans, and trigger canned responses based on matching criteria including custom field values. Agent collision avoidance locks tickets during response composition to prevent duplicate replies, while SLA plans with business hour schedules track due dates and escalate overdue tickets automatically. Custom forms and fields let organizations capture structured data specific to each help topic — from IT asset tags to billing account numbers — with configurable required and internal-only visibility. The advanced search system with saved queries and CSV export enables reporting across all ticket metadata and custom fields. The customer portal provides ticket tracking, profile management, and knowledge base access. OAuth2 plugin support enables modern email authentication with Microsoft 365 and Google. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-2.0 licensed.

A deliberately simple ticketing system standing in for both Zendesk and Jira: Peppermint handles internal staff requests and external customer support alike. The stack is modern full-stack TypeScript: Next.js and React over Prisma and PostgreSQL, which makes it light to run and approachable for developers extending it. Ticket creation is straightforward - a markdown editor with file uploads, assignment, status tracking, and a logical workflow that new agents grasp without a manual. Mailbox integration converts email into tickets automatically: configure SMTP/IMAP per mailbox and incoming messages become trackable tickets. Each client accumulates an interaction history, giving agents context on every past request before replying. Two touches distinguish it from bare-bones ticketing: a built-in markdown notebook with todo lists for internal documentation and knowledge sharing, and OIDC authentication so agents sign in through your existing identity provider - Keycloak, Okta, Authentik, or Azure AD. Configurable webhooks and email notifications push ticket events to third-party services. The UI is responsive from mobile to 4K, and everything works fully offline in air-gapped environments. Docker-native and scalable via Kubernetes, with an active community of 3,000+ GitHub stargazers.

GLPI combines helpdesk ticketing, hardware inventory, license compliance, CMDB, and project management in a single PHP application with over 6,200 GitHub stars and 500,000+ Docker pulls, offering a unified ITSM platform that replaces ServiceNow, Freshservice, and ManageEngine without per-agent pricing. The ITIL-aligned service desk handles incidents, problems, changes, and service requests with configurable SLA management, approval workflows, satisfaction surveys, and business rules that automate ticket routing, escalation, and categorization. Native dynamic inventory through the GLPI Agent discovers Windows, Linux, and macOS endpoints with deep hardware profiling, while network discovery scans switches, printers, and infrastructure devices automatically. Software and license management tracks per-user and per-core license allocations with compliance reporting, expiration alerts, and financial cost tracking across the asset lifecycle from purchase through depreciation to disposal. Data center infrastructure management provides rack visualization with U-level positioning, PDU tracking, and connection mapping. The integrated forms editor builds custom request portals for end-users, while the self-service portal lets users submit tickets, browse the service catalog, and reserve assets. Webhooks trigger external HTTP calls on events, and the High-Level REST API v2 exposes every resource for automation. A plugin marketplace offers 90+ extensions for monitoring integration, advanced reporting, and authentication. Deploy via Docker with the glpi/glpi image alongside MySQL. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPLv3 licensed.

With over 3,200 GitHub stars, 900 forks, and backing from the team behind ERPNext, Frappe Helpdesk delivers a modern, streamlined alternative to Zendesk and Freshdesk with unlimited agents, no per-seat pricing, and full source code access under the AGPL-3.0 license. Built on the Frappe Framework with a Python backend and Vue 3 frontend using Frappe UI, the application collects customer inquiries from email, web forms, and the customer portal into a centralized ticketing queue with complete conversation history and threaded replies. Customizable SLA rules define response and resolution timelines by ticket type or team, triggering automatic alerts and escalations when deadlines approach or are missed. Assignment rules route incoming tickets to the appropriate agents based on priority, issue type, or workload balancing, while manual reassignment and transfer between teams remains available at any time. The customer self-service portal lets users submit tickets, track status, and search a knowledge base of published help articles that reduce repetitive support requests. Agents access saved reply templates for consistent, rapid responses to common queries. Custom fields, configurable workflows, and saved views adapt the interface to match each organization's support process. Real-time updates via WebSocket push ticket changes instantly to all connected agents. The PWA-compatible interface provides mobile access without a native app. Frappe Framework compatibility spans versions 15 and 16. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

For teams that answer customers by email, UVdesk is a free, self-hosted helpdesk that keeps every conversation in one shared queue. Customers have three ways in: a connected mailbox, the support portal, or a public ticket link that opens a conversation without a login. Gmail, Yahoo, Outlook, or any IMAP mailbox can feed the queue, with no limit on how many. Agents work in a threaded ticket view, where they reply, forward to a colleague, leave private notes, add collaborators, and pin important messages. Saved replies answer repeat questions, and prepared responses set a status, tag, priority, or assignment from the ticket footer. Administrators route work through groups and teams, and agent privileges decide which tickets each person may see. Workflows run events, conditions, and actions in the background, while spam settings reject senders by address, domain, or IP. A knowledge base of folders, categories, and articles, with revision history and related articles, lets customers find answers without writing in. Customers can rate the support they received, and the Kudos report lists those ratings by agent, group, team, type, priority, customer, or source. Portal branding covers a logo, brand colors, a tag line, and custom CSS and JavaScript. The community edition places no cap on agents, groups, teams, customers, or tickets. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. OSL-3.0 licensed.

With 5,700+ GitHub stars and over a decade of active development since 2012, Zammad is the open-source helpdesk platform that unifies every customer communication channel — email, live chat, telephone, WhatsApp, Telegram, Facebook, SMS, and web forms — into a single ticket management interface backed by PostgreSQL, Elasticsearch, and Redis. Version 7.0 introduced native AI features including automated ticket categorization, priority assignment, and title rewriting via AI agents that plug into triggers, macros, and scheduler jobs, plus one-click AI ticket summaries and a writing assistant — all configurable with your choice of LLM provider: OpenAI, Anthropic, Mistral AI, Azure AI, Ollama for local models, or any custom OpenAI-compatible endpoint with full audit logging of every AI action. Define service level agreements with first response, update, and solution time tracking tied to business hours calendars, with automatic escalation notifications. The knowledge base provides multilingual FAQ management with internal and public visibility. Core workflows enable dynamic ticket masks with conditional field dependencies per group. Text modules let agents insert predefined responses via the double-colon shortcut, while macros execute multi-step actions with one click. Security includes two-factor authentication, S/MIME and PGP email encryption, and single sign-on via SAML or OpenID Connect. Integrations connect to GitHub, GitLab, Microsoft 365, LDAP with nested group support, and Exchange. Deploy via Docker Compose, Kubernetes with the official Helm chart, or DEB/RPM packages. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPLv3 licensed.

Unlimited agents, unlimited tickets, unlimited mailboxes, forever, on a $4 VPS - FreeScout's pricing inversion is why it became the most popular self-hosted Help Scout alternative, a PHP/Laravel help desk and shared inbox developed from scratch over eight years. The inbox deliberately behaves like Gmail or Outlook, so new support agents need close to zero training. The email-support core is genuinely complete: seamless IMAP/SMTP integration including modern Microsoft Exchange authentication, collision detection that warns when two agents open the same conversation, canned responses, auto-replies, internal notes, open tracking, starring, forwarding, merging, and moving conversations between mailboxes, phone-call logging, push notifications, and an auto-refreshing conversation list - plus screenshot pasting straight from the clipboard into replies. It's 100% mobile-friendly, fully screen-reader accessible, and translated into 28 languages. Beyond the core, an ecosystem of 100+ modules (mostly one-time $12-20 purchases) adds knowledge base, workflows with Gmail-filter-style automation rules, satisfaction ratings, time tracking, tags, custom fields, LDAP, Slack, WhatsApp and Telegram channels, and an API with webhooks - pay only for what your team needs. Web installer and updater included. AGPL-licensed.

LibreDesk unifies live chat, email, and future channel integrations into a single agent inbox where every customer conversation converges regardless of origin, replacing per-seat-priced tools like Zendesk, Intercom, and Freshdesk with a zero-cost alternative that has surpassed 2,000 GitHub stars. Built on a Go backend with a Vue.js 3 and ShadcN UI frontend, it ships as a single binary requiring only PostgreSQL and Redis. The embeddable live chat widget drops onto any website with a snippet, while the AI assistant handles initial customer queries using answers grounded in your knowledge base before escalating to human agents when needed. Agent copilot drafts replies, summarizes conversation threads, and rewrites messages for tone adjustment directly within the inbox interface. Automation rules trigger on conversation events to tag, assign, and route tickets based on configurable conditions, while auto-assignment distributes workload by agent capacity or custom criteria. SLA management tracks response and resolution time targets with breach notifications, and automated CSAT surveys measure satisfaction after conversation closure. Macros save frequently sent responses as reusable templates that simultaneously set tags and assign conversations. Role-based access control provides granular per-action permissions for teams and individual agents, and SSO supports Google, Microsoft, and any OIDC provider. The HTTP/JSON API and webhook system enable custom integrations with external tools. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Unleash the power of Chatwoot, the open-source superhero in the world of customer experience! This platform is perfect for businesses craving to connect with their customers across a multitude of channels without breaking the bank. Wave goodbye to the high-and-mighty likes of Intercom, Zendesk, and Salesforce Service Cloud, and say hello to a wallet-friendly powerhouse. Chatwoot turns your agents into customer service ninjas, armed with the latest in workload management, performance tracking reports that refresh themselves (because who has time for that?), and automations that work smarter, not harder. Zap through conversations with lightning-fast responses and manage your social media and email interactions in a single bound. Plus, with Chatwoot, you get to be the Sherlock of customer satisfaction, deducing your CSAT scores on autopilot. All this hosted on RepoCloud, where the cost is as tiny as the effort you'll need to switch over. Get ready to engage, enlighten, and entertain your customers with Chatwoot!

Support teams handling website live chat, email queues, and social messaging channels gain a unified, AI-assisted helpdesk in Bytedesk. Incoming conversations from web widgets, mobile SDKs, WhatsApp, WeChat, and email flow into a single agent workbench equipped with skill-group routing, VIP priority rules, and automatic human handoff. Customer-facing AI agents connect to Ollama, DeepSeek, OpenAI, Qwen, and Zhipu models to answer recurring inquiries using retrieval-augmented generation (RAG) over internal knowledge bases and FAQ libraries, complete with function calling and Model Context Protocol (MCP) tool execution. Complex escalations convert into SLA-tracked tickets with custom approval workflows, or transition directly into browser-based WebRTC video calls, screen sharing sessions, and FreeSwitch voice call center queues. Supervisors track real-time queue depth, bot resolution rates, token usage, automated AI quality scores, and customer satisfaction surveys from the analytics dashboard. Native client SDKs for Web, iOS, Android, Flutter, UniApp, WordPress, and WooCommerce make embedding customizable chat widgets straightforward across any storefront. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Small MSPs waste thousands of dollars annually on overlapping subscriptions for documentation, ticketing, and billing tools that don't talk to each other. ITFlow replaces that fragmented stack with a unified platform where client contacts, locations, vendors, computer assets, software licenses, domains, SSL certificates, passwords, and documents all live under one roof. The AES-encrypted password vault stores credentials with organized access controls, and domain plus SSL certificate tracking generates automated renewal alerts before expiration disrupts client services. Ticketing supports creation, prioritization, assignment, and SLA tracking, with a client portal where customers submit tickets, view invoices, approve quotes, and access their own documentation independently. The accounting module covers the full lifecycle: quotes, recurring billing, expense tracking, Stripe payment processing, and financial dashboards showing revenue and outstanding balances at a glance. AI integration through Ollama, LocalAI, or ChatGPT accelerates documentation writing and ticket responses directly within the interface. The modular architecture lets you enable only what you need, sidestepping the bloat of enterprise PSA platforms designed for organizations ten times your size. With stable releases since 2025 and zero per-user licensing, ITFlow removes the escalating costs that make commercial PSA tools unsustainable for growing teams. The PHP application deploys with MariaDB and Nginx, ready for production in minutes.

Nearly two decades running engineering organizations: Redmine is the veteran open-source project management and issue tracker, a Ruby on Rails application (GPLv2) still in active development. Its core strength is configurability: define your own trackers (bug, feature, task, or anything else), issue statuses, and role-based workflows that control exactly which transitions each role may perform, then extend records with custom fields of every type. Issues support subtasks, relations (blocks, precedes, duplicates), watchers, categories, and full journaled history, with saved custom queries and cross-project filtering for slicing the backlog any way you need. Around the tracker sit Gantt charts and calendars, a roadmap driven by versions, per-project wikis, forums, news, and document repositories, plus time tracking with estimated versus spent hours and activity-based reporting. Multi-project support runs deep - subprojects, per-project modules, and granular role-based permissions - and repository integration (Git, Subversion, Mercurial) links commits to issues automatically. Email notifications, inbound email-to-issue creation, LDAP authentication, a REST API, and a large plugin and theme ecosystem round it out. Recent 6.x releases brought substantial query and rendering optimizations. Self-hosting keeps your entire project history in your own database, free of per-seat licensing.

Windshift packs boards, sprints, roadmaps, test runs, time tracking, and a customer portal into one open-source tracker that replaces Jira on a server you control. Epics, stories, and sub-tasks form a hierarchy you can view as a board, list, tree, or map, and backlog items drag into dated sprints. The roadmap stretches across weeks, months, or quarters, and milestone pages show completion percentage with a status breakdown. Each workspace defines its own item types, custom fields, screens, statuses, priorities, workflows with conditions and approvals, and permissions, while JQL-style queries save as shared views. Event-driven rules update fields, notify people, and create work. Customers file requests through a public portal, and your team works them through queues with SLAs and approvals. Reusable test cases roll into test runs with success rates, and timers log billable and internal hours against projects and customers. GitHub, GitLab, Gitea, and Forgejo connections put branches and pull requests on the work item, and the importer brings over Jira projects, comments, attachments, and worklogs. A knowledge base and an asset register keep documentation and inventory next to the work. The interface speaks nine languages, including right-to-left Arabic, and sign-in supports OIDC single sign-on and passkeys. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Trusted by thousands of organizations worldwide with over 14,700 GitHub stars, Snipe-IT has been the gold standard in open-source IT asset management since 2013. Built on Laravel 12 with PHP 8.2+, it provides a comprehensive web-based platform for tracking every physical and digital asset in your organization — from laptops and servers to software licenses, accessories, consumables, and components. The check-in/check-out system assigns assets to users with full audit trails, digital signature acceptance, and automated email notifications for checkouts, approaching deadlines, expiring warranties, and low inventory. License management handles multi-seat software with seat-by-seat tracking, compliance monitoring, and expiration alerts. Custom fields let you capture organization-specific metadata, while the advanced search engine supports logical operators including and/or conditions, exact matching with is:value, fuzzy exclusions with not:value, and null checks. SCIM 2.0 integration synchronizes users, groups, locations, companies, and managers from identity providers like Azure Entra ID and Okta. Enterprise authentication supports LDAP, Active Directory, Google Secure LDAP, and SAML 2.0 single sign-on. The reporting dashboard generates custom asset reports with saved templates, depreciation schedules, and audit logs. QR code labels enable instant mobile asset lookup via barcode scanners. The full-featured JSON REST API powers custom integrations, with community-built SDKs, MCP servers, and third-party mobile apps including SnipeMate and Snipe-Scan. Deploy via Docker Compose with MariaDB 11 in minutes. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.