License & Deployment Mix: 40 tools – 11 OSS, 15 SaaS. (OSS and SaaS counts can overlap when an open-source tool also offers a vendor-hosted edition.)

What Is a Ticketing System?

A ticketing system is software that tracks, manages, and resolves requests from users. Each request becomes a ticket – a structured record with an ID, status, priority, assignee, and full conversation history. Ticketing systems provide accountability, SLA enforcement, and audit trails for support operations.

The information on these pages was researched by a combination of human review and large language models. To suggest an addition or correction, please contact us. Prepared by Rhodium Systems Inc., author of the ResorsIT platform — a unified IT operations management platform for IT teams and MSPs that integrates a curated suite of open-source, commercial, and SaaS applications into a single system with shared identity, single sign-on, access control, and a common audit trail. Use this catalogue only as a starting point for your own research, and review any tool carefully against your own requirements before relying on it. Catalogue data version 2026.197.

Comparison

Evaluation Overview

This evaluation covers help desk and ticketing systems for enterprise support operations. The focus is on ticketing for support staff and internal or MSP help desk operations – not project management issue tracking (though some PM tools like Redmine overlap with this use case).

Use Cases

Three primary use cases drive this evaluation:

1. Customer Support / Help Desk – external customer-facing ticket management
2. Internal IT Operations – IT service desk for employees and internal teams
3. MSP Multi-Client Help Desk – managed service provider operations with per-client isolation, SLAs, and billing

Help Desk vs Issue Tracking

Help desk ticketing and project issue tracking serve different purposes:

Some tools (Redmine, GLPI, Zammad) blur this line. For complex environments, two separate systems may be needed: one customer-facing help desk and one for internal IT/development issue tracking.

SSO / OIDC Comparison

OIDC is the preferred SSO protocol. The table below shows each tool’s SSO capabilities and Authentik compatibility (Authentik as the IdP).

Legend: Yes = native; Plugin = community plugin; Paid = paid module/addon; Dir = via directory service; * = limited or conditional support.

SSO Summary by Method

Native OIDC: Peppermint, OTOBO, Frappe HD, JSM DC, Zendesk, Freshdesk, Freshservice, ServiceNow, HubSpot (Enterprise), ConnectWise PSA, Syncro, DeskDay, Pulseway, Atera (Enterprise), NinjaOne (Enterprise)

OIDC via Plugin/Module: GLPI (plugin), FreeScout (paid module), osTicket (plugin), Redmine (plugin), Zammad (via OAuth2)

SAML only (no OIDC): ManageEngine SDP MSP, SupportPal, Deskpro, Jitbit, Faveo, Kaseya Vorex/BMS, Autotask PSA, HaloPSA, SuperOps, Acronis PSA

Web-server-level only: Znuny, OTRS, RT

No SSO: UVDesk (Community Edition)

Ticket ID Behavior

Ticket ID behavior matters for integrations, audit trails, and cross-queue workflows. Most tools assign a global sequential ID that never changes. Jira is the notable exception.

Key finding: Only Jira changes the visible ticket key when a ticket is moved between projects (e.g., SUPPORT-42 becomes OPS-108). The internal ID is preserved, but the human-readable key changes. All other tools keep the same ticket ID regardless of queue or project reassignment.

Markdown Support

Legend: Full = native Markdown throughout; Input = Markdown accepted on input, stored as rich text; Inline = rendered inline in articles; KB only = only in knowledge base, not tickets.

Ticket Split, Merge, and Clone

A single intake ticket often contains multiple distinct issues that each need their own ticket (separate assignee, SLA, status). The inverse problem – many tickets for the same underlying issue – requires merge. Cloning lets agents start a new ticket from an existing one as a template.

Importance by use case:

• Customer Support / Help Desk – Split and Merge are critical; users file omnibus tickets routinely
• Internal IT / ITSM – Split is important for cross-CI incidents; Merge for duplicate-report storms
• Pre-Sales / CRM – Not needed; the abstraction is the conversation, not the issue

Legend:

• Native – built-in UI/API action (named in notes column where known)
• Plugin – requires an add-on, marketplace app, or paid module
• Workaround – only via copy/paste, scripts, or manual link-and-close
• Templates – has reusable ticket templates rather than a per-ticket clone action
• Link – can mark “duplicate of” / “related to” without true content merge
• No – no path documented
• Unknown – not documented in public sources

Open-Source Self-Hosted

Paid Self-Hosted

SaaS (Customer Support / ITSM)

MSP / PSA

Coverage summary

All three operations native (best for support desks that need to restructure tickets after intake): Zoho Desk, ManageEngine SDP, HubSpot Service Hub.

Split + Merge native, no clone (handle the intake re-org problem; templates substitute for clone): Zammad, Znuny, OTOBO, OTRS, FreeScout, SupportPal, NinjaOne, Syncro, SuperOps, Frappe Helpdesk.

Merge only, no split (a real gap for customer support): osTicket, UVDesk, ServiceNow, Atera, Faveo, Datto Autotask PSA.

Issue tracker style (link-only “merge”): Jira / JSM, Redmine, ServiceNow.

Workarounds or unknown (verify before relying on these for customer-facing support): Peppermint, Erxes, ITFlow, DeskDay, Bitrix24 helpdesk, Acronis PSA, Kaseya BMS, HaloPSA (split), RT, Jitbit (split).

Recommendation

For a customer support help desk that will take user-filed omnibus tickets, prefer a tool where Split and Merge are both native: Zammad, Zoho Desk, Freshdesk, OTOBO, or ManageEngine SDP. For an ITSM deployment, ManageEngine SDP, OTOBO, and Zoho Desk all cover the full set; ServiceNow and Jira require parent-child workarounds for both. For a PSA deployment, NinjaOne, Syncro, and SuperOps lead the MSP segment with native split.

Feature Comparison – Open Source

GitLab column: “Native (1)” = built-in but single instance only; “Best” = best multi-instance support; “Plugin” = community plugin; “No” = none.

Feature Comparison – Paid Self-Hosted

JSM Data Center status: Atlassian closed JSM Data Center to new customers on 2026-03-30 (feature freeze; renewals to 2028-03-30; full EOL 2029-03-28). “JSM DC” rows below describe existing on-prem deployments only – new customers must use Jira Service Management Cloud (SaaS) instead.

†JSM DC closed to new customers as of 2026-03-30. *JSM Knowledge Base requires Confluence integration.

Feature Comparison – SaaS Only

Multi-Tenant / MSP Support

This section compares MSP capabilities across all 19 ITSM and PSA tools evaluated. For detailed per-tool analysis including gap assessments, see each tool’s dedicated MSP/Multi-Tenant section.

Multi-Tenancy Architecture

ITSM Tools

PSA Tools

ITSM tools use varied approaches – from database-level domain separation (ServiceNow) to entity hierarchies (GLPI) to configuration-level isolation (OTOBO/Znuny). PSA tools are purpose-built for MSP multi-client operations with per-account isolation as a core feature.

MSP Billing & Contract Management

ITSM Tools

PSA Tools

Legend: QB = QuickBooks.

Most ITSM tools lack billing capabilities entirely; ManageEngine SDP MSP is the notable exception with native billing. All PSA tools except NinjaOne include native billing – NinjaOne is RMM-first and relies on a paired PSA for billing.

MSP Dispatch & Scheduling

Legend: Skills = skills-based routing; Auto = automatic scheduling.

ConnectWise PSA has the most advanced dispatch board with drag-and-drop scheduling, skills-based routing, and automatic technician assignment. Autotask and HaloPSA also provide visual dispatch. ITSM tools universally lack dispatch boards – this is a core PSA differentiator.

Per-Customer Capabilities

*JSM CMDB requires Jira Assets.

PSA tools consistently provide per-customer SLAs, branded portals, and per-customer reporting as core features. Most ITSM tools require workarounds or plugins for equivalent functionality. CRM features are exclusive to PSA tools (ConnectWise, Autotask, Acronis PSA).

RMM Integration

ITSM tools mostly lack RMM integration – Faveo is the notable exception with its own RMM agent. PSA tools either include native RMM (unified platforms) or provide deep third-party RMM integrations with bidirectional alert-to-ticket flows.

ITSM vs PSA Tool Positioning

Understanding each tool’s primary positioning helps select the right tool for the right use case:

ITSM-First (ticketing / service desk primary): GLPI, OTOBO, Znuny, OTRS, ServiceNow, JSM, ManageEngine SDP, Faveo

PSA-First (MSP operations primary): ConnectWise PSA, Autotask PSA, HaloPSA, Kaseya BMS, DeskDay, Acronis PSA

Unified RMM+PSA (single-platform MSP): SuperOps, Syncro, Atera, Pulseway

RMM-First (ticketing secondary): NinjaOne (pairs with dedicated PSA)

ITSM tools excel at ITIL processes, change management, and complex workflows but lack billing, dispatch, and RMM integration. PSA tools excel at MSP operations but lack ITIL depth. Unified RMM+PSA platforms trade feature depth for operational simplicity.

MSP Recommendations

ITSM for MSP Operations

For MSPs needing ITSM capabilities with multi-tenant support:

Tier 1 – Purpose-Built MSP ITSM

Tier 2 – Adequate with Workarounds

Tier 3 – Not Recommended for MSP

Tools requiring separate instances per client: Znuny (no multi-tenancy package), JSM DC (project workaround only), Zammad, FreeScout, osTicket, UVDesk, Peppermint.

PSA for MSP Operations

For MSPs needing full PSA capabilities (billing, dispatch, CRM, RMM integration):

Tier 1 – Full-Featured PSA

Tier 2 – Unified RMM+PSA Platforms

Tier 3 – Specialized or Limited PSA

MSP Suitability Summary

Integration Capabilities

Summary of integration capabilities for each evaluated tool.

Columns: SSO = SSO method (with Authentik as IdP); Identity = user/contact sync method; Devices = device/asset sync to tool’s CMDB; API = ticket REST API quality; Webhooks = outbound event forwarding; Alerts = monitoring alert-to-ticket path.

Legend: Y = Yes (native/strong); L = Limited; N = No/Not supported; Plugin = requires plugin/add-on.

Open-Source Self-Hosted

Paid Self-Hosted

SaaS Only (Non-PSA)

PSA / MSP Tools

* = conditional (paid plan, Enterprise tier, etc.). GI = GenericInterface (OTOBO/Znuny/OTRS framework). Proxy = reverse-proxy header (REMOTE_USER). Dir = directory service sync. RMM = monitoring alerts flow through RMM alert-to-ticket rather than a direct monitoring webhook.

Feature Matrix

Legend: SLA = SLA management; KB = knowledge base; Portal = customer self-service portal; Email = email-to-ticket; Git = GitLab integration. *JSM KB requires Confluence. *ConnectWise KB via separate Documentation product.

Multi-GitLab Instance Support

A key requirement is connecting to multiple GitLab servers (e.g., GitLab.com + internal GitLab + business process GitLab). No tool natively supports this out of the box.

Best Options for Multi-GitLab

Recommendation: For multi-GitLab integration, use automation middleware or a custom REST integration. No ticketing tool provides native multi-GitLab-server support in a single configuration.

Pricing Summary

Legend: OSS = open-source self-hosted; a = agent; u = user; t = tech; mo = month.

Analysis and Observations

Help Desk vs ITSM Gap

Most tools fall clearly into one of two camps:

Help Desk First (customer support focused): Zammad, FreeScout, osTicket, SupportPal, Deskpro, Zendesk, Freshdesk, Peppermint

ITSM First (IT operations focused): GLPI, Znuny, OTOBO, OTRS, ServiceNow, JSM, ManageEngine ServiceDesk Plus, Freshservice

A two-system approach may be optimal:

• Customer-facing: Zammad or FreeScout (simple, modern, email-focused)
• Internal IT/MSP: GLPI (free, ITIL, multi-tenant) or ManageEngine SDP MSP (paid, purpose-built)

Open Source Maturity

The most mature open-source options for enterprise help desk are:

1. GLPI – strongest ITSM + multi-tenant + asset management; 20+ years; very active
2. Znuny/OTOBO – strongest ITIL heritage (OTRS lineage); multi-tenant; Perl ecosystem
3. Zammad – best modern UX for help desk; native GitLab; lacks multi-tenancy
4. Request Tracker – most flexible for custom workflows; 25+ years; Perl; minimal UI

Technology Stack Considerations

Tools

39 tools.

Acronis PSA

Acronis PSA is the professional-services-automation module of the Acronis Cyber Protect Cloud ecosystem, adding MSP ticketing, billing, and workflow to Acronis backup and security.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: SAML

Website

Atera

Atera is a cloud RMM and PSA platform for MSPs and internal IT teams, bundling remote monitoring and management, help-desk ticketing, and billing into a single per-technician SaaS subscription.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC

Website

Bitrix24 (Helpdesk / Contact Center)

Bitrix24 is an all-in-one collaboration + CRM platform that includes customer support through its Contact Center module and CRM activity system.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

ConnectWise PSA (formerly Manage)

ConnectWise PSA (formerly Manage) is a market-leading professional-services- automation platform for MSPs, covering ticketing, agreements, projects, time, billing, and procurement.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: OIDC

Website

Creatio Service

Creatio Service is the customer service module of Creatio’s no-code platform, offering case management, omnichannel support, SLA tracking, a customer portal, ITIL workflows, and AI-assisted routing.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC

Website

DeskDay

DeskDay is a cloud, chat-first PSA and service-desk platform for MSPs, pairing conversational ticketing with project, billing, and client-management features.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none

Website

Deskpro

Deskpro is a commercial help desk and ticketing platform available self-hosted or as SaaS, offering multi-channel support, SLA management, a knowledge base, automation rules, and reporting.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

Erxes (Ticketing / Support)

Erxes is an “Experience Operating System” (XOS) positioned as an open-source alternative to HubSpot + Zendesk.

License: AGPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Faveo Helpdesk

Faveo Helpdesk is a Laravel-based help desk and ITSM platform with ticketing, SLA management, a knowledge base, workflow automation, and AI-assisted routing; a limited free edition is available.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

Frappe Helpdesk

Frappe Helpdesk is an open-source, self-hosted help desk and ticketing tool built on the Frappe framework with a Vue.js frontend, offering agent and customer portals, SLAs, auto-assignment, and a knowledge base.

License: AGPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

FreeScout

FreeScout is a free, open-source, self-hosted help desk and shared-inbox tool (a Help Scout clone) built on PHP/Laravel, with email-to-ticket, collision detection, and optional paid modules.

License: AGPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Freshdesk

Freshdesk is Freshworks’ cloud customer-support help desk: multichannel ticketing, automation, a knowledge base, and SLA management for support teams.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none

Website

Freshservice

Freshservice is Freshworks’ cloud IT service management (ITSM) suite: incident, service-request, change, and asset management with an ITIL-aligned service catalog.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC

Website

GLPI

GLPI is an open-source, self-hosted IT service management platform with an ITIL- aligned service desk, asset and configuration management (CMDB), and strong native multi-tenancy via its entity hierarchy.

License: GPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

HaloPSA

HaloPSA is a cloud professional-services-automation platform for MSPs, unifying help-desk ticketing, CRM, contracts, projects, time tracking, and billing in a single highly configurable product.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none

Website

HubSpot Service Hub

HubSpot is CRM-first, not ITSM. Device/asset sync maps to CRM objects rather than a CMDB. SSO requires Enterprise tier. Integration is viable for customers using HubSpot Service Hub but not recommended for IT service desk operations.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none

Website

ITflow

ITflow is an open-source IT documentation, ticketing, and accounting platform for small MSPs. This evaluation focuses on its ticketing capabilities.

License: GPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Jira Service Management (Cloud / Data Center)

Category: SaaS Only (for new customers, as of 2026-03-30); existing Data Center customers can renew through 2028-03-30

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none

Website

Jitbit Helpdesk

Jitbit Helpdesk is a commercial help desk available self-hosted or as SaaS, offering ticket management, an automation engine, knowledge base, email integration, SLA tracking, and a REST API.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

Kaseya Datto Autotask PSA

Autotask PSA (Kaseya/Datto) is a cloud professional-services-automation platform for MSPs – ticketing, projects, contracts, time and billing, and inventory – integrated with the Kaseya/Datto RMM and backup suite.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none

Website

Kaseya Vorex / BMS

Kaseya BMS (Vorex) is a cloud PSA and business-management platform for MSPs – ticketing, projects, time, billing, CRM, and inventory – integrated with the Kaseya RMM suite.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none

Website

ManageEngine ServiceDesk Plus (MSP)

ManageEngine ServiceDesk Plus (MSP) is a commercial ITSM and help desk platform for managed service providers, with multi-account incident, problem, change, asset, and CMDB management plus billing.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

NinjaOne

NinjaOne is a cloud RMM and endpoint-management platform with increasingly capable native ticketing, used by IT teams and MSPs to monitor, patch, and support endpoints.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC

Website

osTicket

osTicket is a mature open-source (GPL-2.0) help desk system written in PHP, offering email, web-form, and API ticket creation, department routing, SLA management, and a customer portal.

License: GPL-2.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

OTOBO (OTRS Fork)

OTOBO is an open-source (GPL-3.0), Perl-based ITIL/ITSM help desk and ticketing system, a modern fork of OTRS Community Edition with CMDB, process automation, and a customer portal.

License: GPL-3.0-only (OSS) · Kind: web · Deploy: native, docker · SSO: OIDC

Website · Source

OTRS (Commercial)

OTRS is a commercial, ITIL 4-certified IT service management and help desk platform, offering a full ITSM suite (incident, problem, change, CMDB), SLA management, process automation, and a customer portal.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

Peppermint

Peppermint is a lightweight, open-source, self-hosted help desk and ticketing tool built with Node.js and React, offering ticket management, email integration, native OIDC, and role-based access control.

License: AGPL-3.0-only (OSS) · Kind: web · Deploy: native, docker · SSO: none

Website · Source

Pulseway

Pulseway is a mobile-first cloud RMM platform with integrated ticketing, letting IT teams and MSPs monitor and remotely control systems from a phone or browser.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: OIDC

Website

Redmine (with Help Desk Plugins)

Redmine is an open-source, self-hosted project management and issue-tracking tool built on Ruby on Rails, with time tracking, Gantt charts, a wiki, and a large plugin ecosystem including help-desk add-ons.

License: GPL-2.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Request Tracker (RT)

Request Tracker (RT) is a mature open-source ticketing system written in Perl, offering custom ticket lifecycles, event-driven scrips, SLA enforcement, approvals, email-to-ticket, and a JSON REST API.

License: GPL-2.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

ServiceNow

ServiceNow’s Domain Separation provides enterprise-grade multi-tenancy unmatched by any other ITSM platform.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none

Website

SuperOps

SuperOps is a modern cloud RMM+PSA platform for MSPs, combining remote monitoring and management with help-desk ticketing, projects, and billing in one product.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none

Website

SupportPal

SupportPal is a self-hosted, commercial help desk and ticketing platform built on PHP/Laravel, offering multi-channel support, SLA management, a knowledge base, automation rules, and macros.

License: Proprietary (proprietary) · Kind: web · Deploy: native · SSO: none

Website

Syncro

Syncro is an all-in-one cloud RMM+PSA platform for small and mid-sized MSPs, combining remote monitoring and management, ticketing, and integrated invoicing at a flat per-user price.

License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: none

Website

UVDesk

UVDesk is an open-source, PHP/Symfony help desk system with ticketing, mailbox integration, workflow automation, a knowledge base, and e-commerce integrations; paid SaaS tiers add SLAs.

License: MIT (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Zammad

Zammad is an open-source (AGPL-3.0) help desk and ticketing platform with multi- channel support (email, chat, phone, social), SLA management, a knowledge base, agent collision detection, and a comprehensive REST API.

License: AGPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Zendesk

Zendesk provides the most mature SaaS integration surface: comprehensive REST API, SCIM for identity provisioning, native webhooks, and OIDC SSO. The Sunshine CMDB (Enterprise tier) enables device/asset sync from rm-server.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none

Website

Znuny (OTRS Fork)

Znuny is a free, open-source, self-hosted help desk and ITSM platform forked from OTRS, offering ITIL-compatible incident, problem, and change management, SLAs, a CMDB, and BPMN-style process automation.

License: GPL-3.0-only (OSS) · Kind: web · Deploy: native · SSO: none

Website · Source

Zoho Desk

Zoho Desk provides REST API and native webhooks for integration. SSO routes through Zoho Directory (SAML) rather than direct OIDC. The absence of a CMDB limits device/asset sync.

License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none

Website