License & Deployment Mix: 18 tools – 2 OSS, 16 SaaS. (OSS and SaaS counts can overlap when an open-source tool also offers a vendor-hosted edition.)

What Is PSA?

Professional Services Automation (PSA) is a category of business software designed for managed service providers (MSPs) and IT service companies. A PSA platform consolidates the core operational functions of an MSP into a single system: ticketing, time tracking, billing, project management, SLA management, customer management, resource scheduling, contracts, dispatch, and reporting.

PSA is the business backbone of an MSP. Where RMM (Remote Monitoring and Management) handles the technical side – monitoring devices, deploying patches, running scripts – PSA handles the business side: tracking work, billing customers, managing contracts, and measuring profitability.

The term “PSA” originates from professional services firms (consulting, legal, accounting) but has been adopted almost exclusively by the MSP industry. In practice, “PSA” and “MSP business platform” are interchangeable terms.

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 PSA (Professional Services Automation) platforms for MSP business operations. The focus is on MSP service delivery – ticketing, time tracking, billing, contracts, dispatch, and customer management in a single integrated platform.

Relationship to Other Evaluations

PSA tools overlap with tools evaluated in other directories:

• Ticketing (Ticketing / Help Desk) – standalone help desk and ITSM tools. Some PSA tools (ConnectWise, Autotask, HaloPSA, Atera, NinjaOne, Syncro, SuperOps) also appear in the ticketing evaluation with a focus on their ticketing capabilities.
• Endpoint Management (Endpoint Management & MDM) – RMM platforms. Several unified RMM+PSA tools (Atera, Syncro, SuperOps, Pulseway, NinjaOne) appear in both evaluations.
• ERP & Accounting (ERP & Accounting) – ERPNext is evaluated there as a full ERP and here for its services/PSA capabilities.

This evaluation focuses on the PSA business operations of each tool, not the RMM or ticketing specifics.

Deployment Model

Key finding: ERPNext is the only open-source option with PSA-like capabilities. All other PSA tools are proprietary SaaS platforms. ConnectWise, HaloPSA, TOPdesk, and Pulseway offer on-premises deployment as an alternative.

Core PSA Features

Legend: Yes = native feature; Basic = limited implementation; Custom = requires configuration or additional modules; No = not available.

Feature Depth Notes

• ConnectWise and Autotask have the deepest PSA feature sets across all categories
• NinjaOne is RMM-first with basic ticketing; it lacks billing, project management, CRM, and dispatch – it pairs with a dedicated PSA
• TOPdesk is ITSM-first; strong ticketing and SLA but no billing or dispatch
• ServiceNow ITBM requires extensive configuration to function as PSA; native strength is IT portfolio management
• ERPNext provides PSA capabilities through its services module within a full ERP framework

RMM Integration

Unified RMM+PSA: Syncro, Atera, SuperOps, Pulseway, and NinjaOne include native RMM – no separate RMM product needed. ConnectWise and Autotask have companion RMM products (CW Automate, Datto RMM) with deep native integration. HaloPSA is RMM-agnostic with 200+ integrations.

Billing Capabilities

Legend: QB = QuickBooks; T&M = Time & Materials; Usage = usage-based metering (per-device, per-user).

Key findings:

• NinjaOne and TOPdesk have no billing – they require a paired PSA or accounting tool
• ERPNext has full accounting built in (no third-party needed)
• ConnectWise, Autotask, and Harmony have the most comprehensive billing engines with 6+ agreement types
• ServiceNow ITBM requires custom development for PSA-style billing

Reporting & Dashboards

Legend: N/A = not applicable (tool lacks billing so profitability/utilization not tracked).

SSO / Authentik Integration

Legend: Yes = native support; * = conditional (higher-tier plan required).

SSO Summary by Method

Native OIDC: ERPNext, ConnectWise PSA, Syncro, TOPdesk, Pulseway, ServiceNow ITBM, Atera (Enterprise), NinjaOne (Enterprise)

SAML only (no OIDC): Autotask PSA, HaloPSA, Kaseya BMS, SuperOps, Accelo, Harmony PSA, Computicate, CloudBlue PSA, Vorex

SCIM provisioning: ServiceNow ITBM only. All other tools require manual user management or API-based provisioning.

API Capabilities

Key findings:

• All tools provide REST APIs
• ConnectWise has the lowest rate limit (60 req/min) – a significant constraint for high-volume integrations
• Atera has the most generous rate limit (700 req/min)
• ServiceNow and NinjaOne use OAuth 2.0 (most secure API auth)
• ERPNext has no rate limit (self-hosted)

Pricing Summary

Legend: u = user; a = agent; t = technician; dev = device; mo = month.

Multi-Tenant / MSP Support

All PSA tools provide multi-tenant support as a core feature – this is fundamental to MSP operations. The depth of per-customer customization varies, with ConnectWise, Autotask, and HaloPSA offering the deepest isolation and branding capabilities.

Integration Summary

Legend: * = conditional (Enterprise plan); RMM = alerts flow through RMM alert-to-ticket; VSA = alerts flow through Kaseya VSA; ITOM = ServiceNow IT Operations Management.

Tools

19 tools.

Accelo

Accelo is a professional services automation platform for small to mid-sized service businesses.

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

Website

Atera

Atera is a unified RMM+PSA platform that combines remote monitoring, ticketing, billing, and remote access in a single cloud product.

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

Website

CloudBlue PSA

CloudBlue PSA is a PSA platform owned by Ingram Micro, the world’s largest technology distributor.

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

Website

Computicate PSA

Computicate PSA is an MSP-focused PSA platform that provides ticketing, time tracking, billing, CRM, dispatch, project management, and contract management.

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

Website

ConnectWise PSA (formerly Manage)

ConnectWise PSA (formerly ConnectWise Manage) is the dominant PSA platform in the MSP industry with the largest market share globally.

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

Website

Datto Autotask PSA

Datto Autotask PSA is one of the two dominant PSA platforms in the MSP industry (alongside ConnectWise PSA).

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

Website

ERPNext (Services Module)

ERPNext is a full-featured open-source ERP system built on the Frappe framework. While not a dedicated PSA platform, its Projects and Services modules provide PSA-like capabilities: project management, time tracking, billing, custom…

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

Website · Source

ERPNext CRM Module

CRM module of the ERPNext suite on the Frappe framework; tight integration with the rest of the ERPNext business apps.

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

Website · Source

Evaluated under CRM / SFA.

HaloPSA

HaloPSA is a modern PSA platform that has grown rapidly as an alternative to ConnectWise and Autotask.

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

Website

Harmony PSA

Harmony PSA is an MSP-focused PSA platform designed for managed service providers and IT service companies.

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

Website

ITflow

ITflow is an open-source IT documentation, ticketing, and accounting platform designed for small Managed Service Providers (MSPs).

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

Website · Source

Kaseya BMS

Kaseya BMS (Business Management Solution) is Kaseya’s PSA offering, designed to integrate tightly with Kaseya VSA (their RMM platform).

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

Website

NinjaOne

NinjaOne is primarily a Remote Monitoring and Management (RMM) platform that has expanded into PSA-adjacent features.

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

Website

Pulseway PSA

Pulseway is a mobile-first unified RMM+PSA platform that combines remote monitoring and management with PSA business operations.

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

Website

ServiceNow ITBM

ServiceNow IT Business Management (ITBM) is a suite of applications within the ServiceNow platform that provides IT portfolio management, project management, financial management, and resource management.

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

Website

SuperOps

SuperOps is a modern, AI-powered unified RMM+PSA platform built from the ground up as a single-codebase product. Unlike competitors that bolted PSA onto existing RMM or vice versa, SuperOps was designed as unified from inception.

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

Website

Syncro

Syncro is a unified RMM+PSA platform that combines remote monitoring and management with PSA business operations in a single product.

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

Website

TOPdesk

TOPdesk is a service management platform popular in Europe (especially the Netherlands, Germany, Belgium, and the UK).

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

Website

Vorex (Kaseya)

Vorex is Kaseya’s lighter PSA option, positioned below Autotask PSA for smaller MSPs and IT departments.

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

Website