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OPSI

opsi.org

From €0.42/mo Free plan Open source WebWindowsmacOSLinuxAPISelf-hosted
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Spec score 9.0 #2 of 49 in Patch Management Software

What it is

OPSI is an open-source client management system for software distribution, operating-system installation, inventory, patch management, and configuration. It can deploy Windows updates, MSI packages, setup programs, and system packages without interactive installation steps. It also automates installations of Windows client and server systems and common Linux distributions, including unattended and image-based setups.

Regular inventory collects hardware and software details, including hardware information from devices without an operating system. Administration can be centralized across multiple sites, each with its own depot servers, configurations, and software packages. Directory integrations support Active Directory, Samba 4, and OpenLDAP; single sign-on extensions support Microsoft Entra ID and Keycloak through SAML 2.0. OPSI-WebGUI runs in a modern browser without client-side installation. Community is free with unlimited devices and one worker process. Basic is free for up to 30 devices and one setup per user. Professional costs €499 a year and requires a minimum purchase of 100 devices; Enterprise costs €899 a year with the same minimum. Enterprise Cloud costs €1,199 a year, starting at 100 devices.

Spec sheet

What it does
OPSI is a client-management system for Windows, Linux and macOS devices, using a Linux server for deployment, inventory and patching.Read 14 Oct 2026 · docs.opsi.org
Product
OPSI is an open-source client management system for automating software distribution, operating-system installation, inventory, patch management, and configuration.Read 2 Oct 2026 · docs.opsi.org
API
Administrators can inspect endpoints at the opsiconfd /docs address; server data is changed through JSON-RPC and the WebGUI add-on provides a REST API.Read 14 Oct 2026 · docs.opsi.org
Security
OPSI documentation recommends SSL/TLS server identity verification and describes multi-factor authentication and SAML single sign-on security options.Read 2 Oct 2026 · docs.opsi.org
Support
uib offers phone and email support through support contracts, as well as training, workshops, and webinars.Read 2 Oct 2026 · opsi.org
Headquarters
Mainz, GermanyRead 23 Sep 2026 · opsi.org
Founded
1995Read 23 Sep 2026 · opsi.org
Basic license conditions
The Basic license is limited to one OPSI setup with a maximum of 30 clients per user, must be renewed for each year, and does not include support for non-free modules.Read 2 Oct 2026 · opsi.org
Certificate security
Custom CA and Let’s Encrypt extensions issue, verify, store and renew OPSI server certificates automatically.Read 14 Oct 2026 · opsi.org
CLI
opsi-cli is a customizable command-line client for backend RPC operations and supports JSON, MessagePack, table and CSV output modes.Read 14 Oct 2026 · opsi.org
Closed extensions
Wikipedia reports that some co-funded modules, including License Management, were not yet released as open source.Read 14 Oct 2026 · en.wikipedia.org
Company founding
uib says the Umwelt-Informatikbüro was founded in 1995 and later incorporated as UIB GmbH.Read 14 Oct 2026 · uib.de
Company headquarters
uib GmbH identifies Mainz, Germany as its base.Read 14 Oct 2026 · uib.de
Company legal identity
The maker is uib GmbH, registered at Bonifaziusplatz 1B, 55118 Mainz, Germany, under commercial register HRB 6942.Read 14 Oct 2026 · opsi.org
Configuration management
Administrators can centrally configure operating systems, drivers and applications and run administrative tasks.Read 14 Oct 2026 · opsi.org
Developer ecosystem
The official GitHub organization publishes repositories for opsiconfd, opsi-clientd, opsi-cli, opsi-utils, opsi-script, Docker and documentation.Read 14 Oct 2026 · github.com
Directory integration
The Directory Connector extension supports Active Directory, Samba 4 and OpenLDAP.Read 14 Oct 2026 · opsi.org
Directory integrations
The Directory Connector extension supports Active Directory, Samba 4, and OpenLDAP.Read 2 Oct 2026 · opsi.org
Documentation depth
The English 4.3 manual covers supported systems, quick start, server, clients, interfaces, products, modules, opsi-script, troubleshooting and contribution.Read 14 Oct 2026 · docs.opsi.org
Identity integration
The Single Sign-On extension supports Microsoft Entra ID and Keycloak through SAML 2.0.Read 2 Oct 2026 · opsi.org
Independent feature summary
AlternativeTo lists automated software distribution and patch management, unattended or image-based OS installation, hardware/software inventory, multiple locations and an open API.Read 14 Oct 2026 · alternativeto.net
Independent listing
AlternativeTo lists OPSI as open source and free, developed by uib GmbH, with 20 alternatives and no comments or reviews on its product page.Read 14 Oct 2026 · alternativeto.net
Independent platform listing
AlternativeTo lists Linux, Flathub and self-hosted as OPSI platforms.Read 14 Oct 2026 · alternativeto.net
Independent praise: automation
SaaSHub highlights automated software deployment as a way to reduce IT-management effort.Read 14 Oct 2026 · saashub.com
Independent praise: customization
SaaSHub describes OPSI as open source and customizable without licensing fees.Read 14 Oct 2026 · saashub.com
Inventory
OPSI regularly collects hardware and software inventory and supports hardware inventory even without an installed operating system.Read 14 Oct 2026 · opsi.org
License limits
Professional and Enterprise have a minimum purchase of 100 devices, and all devices managed with OPSI count toward extension licensing.Read 2 Oct 2026 · opsi.org
License management
The License Management extension provisions, allocates and releases software license keys and compares licenses with inventory.Read 14 Oct 2026 · opsi.org
Limit: community dependency
SaaSHub says OPSI relies heavily on community contributions, which may not always deliver timely fixes or meet every need.Read 14 Oct 2026 · saashub.com
Limit: documentation
SaaSHub reports that users have found the official documentation lacking detail for troubleshooting.Read 14 Oct 2026 · saashub.com
Limit: setup complexity
SaaSHub says initial OPSI setup and configuration can be complex and may require technical expertise.Read 14 Oct 2026 · saashub.com
Linux support
The Linux Agent covers common distributions including Debian, Ubuntu, RHEL, SLES, openSUSE, Oracle Linux, Alma and Mint.Read 14 Oct 2026 · opsi.org
macOS support
The macOS Agent handles .app, .dmg, .pkg and .zip deployment, Apple updates and third-party update scripts.Read 14 Oct 2026 · opsi.org
Monitoring integration
The Monitoring Connector exposes checks for Nagios-compatible systems such as Nagios and Icinga.Read 14 Oct 2026 · opsi.org
Multi-site management
OPSI centralizes administration across multiple sites, which can have their own depot servers, configurations, and software packages.Read 2 Oct 2026 · opsi.org
Multiple locations
Depot servers allow centralized administration of multiple sites with site-specific software and configurations.Read 14 Oct 2026 · opsi.org
Notable partnership
On February 18, 2026, uib announced a partnership with Relution to add UEM and mobile-device management capabilities around OPSI.Read 14 Oct 2026 · opsi.org
Notable release
The September 24, 2026 WebGUI release added inventory views, global search, advanced filters, keyboard shortcuts and bulk client actions.Read 14 Oct 2026 · opsi.org
Open-source licensing
The core project is open source; public repositories show AGPL-3.0 for opsi-webgui, opsi-configed and python-opsi.Read 14 Oct 2026 · github.com
Operating-system deployment
OPSI can perform unattended or image-based installation of Windows clients, Windows Server and many Linux distributions.Read 14 Oct 2026 · opsi.org
Operating-system installation
OPSI can automatically install Windows client and server systems and common Linux distributions, including unattended and image-based installations.Read 2 Oct 2026 · opsi.org
Rating availability
SaaSHub states that it has no OPSI reviews yet.Read 14 Oct 2026 · saashub.com
Release cadence
uib says stable releases are planned monthly, normally on the last Wednesday, with separate testing repositories and package changelogs.Read 14 Oct 2026 · opsi.org
Security authentication
The SSO extension uses SAML 2.0 and currently supports Microsoft Entra ID and Keycloak across configed, WebGUI, opsiconfd admin and opsi-cli.Read 14 Oct 2026 · opsi.org
Security extensions
Enterprise includes Audit Log, Custom CA, Let’s Encrypt, Single Sign-On, and Two-Factor Authentication extensions.Read 2 Oct 2026 · opsi.org
Self-hosting
OPSI can be installed with Docker or a ready-to-use virtual machine, and its Docker helper scripts support Windows, Linux and macOS hosts.Read 14 Oct 2026 · docs.opsi.org
Software deployment
OPSI automates non-interactive software installation and distributes Windows updates, MSI packages, setup programs, and system packages.Read 2 Oct 2026 · opsi.org
Software distribution
The system automates non-interactive distribution of Windows updates, MSI packages, setup programs and system packages.Read 14 Oct 2026 · opsi.org
Web interface
OPSI-WebGUI is accessed through a modern web browser and requires no client-side installation.Read 2 Oct 2026 · opsi.org

Plans and prices

Basic Free Up to 30 devices · selected extensions · 1 worker process Read 14 Oct 2026 · opsi.org
Community Free Unlimited devices · core features · 1 worker process Read 14 Oct 2026 · opsi.org
Professional €4.99 a year 4,99 € / device / year net; annual licence Minimum 100 devices · selected extensions · up to 2 worker processes Read 14 Oct 2026 · opsi.org
Enterprise €8.99 a year 8,99 € / device / year net; annual licence Minimum 100 devices · full extension set · unlimited worker processes Read 14 Oct 2026 · opsi.org
Enterprise Cloud €11.99 a year 11,99 € / device / year net; starting at 100 devices Managed hosting · centralized multi-location management · unlimited worker processes Read 14 Oct 2026 · opsi.org

Every OPSI plan and price →

Strong points and limits

Strong points

  • Automates software distribution and operating-system installation.
  • Collects inventory even without an operating system.
  • Centralizes management across multiple sites.
  • Community plan includes unlimited devices.
  • Web interface requires no client-side installation.

Limits

  • Basic is limited to 30 devices per user.
  • Basic requires yearly renewal and excludes non-free module support.
  • Professional and Enterprise require at least 100 devices.
  • Enterprise Cloud provides product caching only, not config caching.

Who it suits

OPSI suits organizations managing software, operating systems, inventory, patches, and configurations across Windows, Linux, or macOS endpoints. Its multi-site administration and directory integrations are relevant to teams managing distributed setups.

OPSI in depth

Read the full write-up

OPSI is an open-source client management system for organizations that need to deploy software and operating systems, track inventory, and manage configurations across sites. It suits IT teams running Windows and Linux fleets particularly well; macOS support depends on the plan. Its broad automation scope is compelling, but license thresholds and extension terms deserve close attention.

Overview

OPSI brings software distribution, operating-system installation, inventory, patch management, and configuration management into a central system. It can automate non-interactive software installs and distribute Windows updates, MSI packages, setup programs, and system packages. For operating-system rollout, it supports automated Windows client and server installs and common Linux distributions, including unattended and image-based approaches.

Inventory collection runs regularly and can gather hardware information even when a machine has no operating system installed. Multi-site administration lets each location keep its own depot server, configurations, and packages while remaining centrally managed. The browser-based OPSI-WebGUI needs no client installation.

Key features

Deployment and patching: Automating installs and distributing Windows updates can reduce repetitive endpoint work. OPSI's patch and configuration management capabilities make it broader than a tool focused only on operating-system imaging.

Hardware and software inventory: Collecting hardware data without an installed OS is useful when bringing unconfigured machines into a managed fleet.

Multi-site control: Local depots and packages allow site-level arrangements without giving up centralized administration, a practical fit for distributed organizations.

Directory and identity integrations: The Directory Connector extension supports Active Directory, Samba 4, and OpenLDAP. The Single Sign-On extension supports Microsoft Entra ID and Keycloak through SAML 2.0.

Security options: OPSI documentation recommends SSL/TLS server identity verification and describes multi-factor authentication and SAML single sign-on. Enterprise includes Audit Log, Custom CA, Let’s Encrypt, Single Sign-On, and Two-Factor Authentication extensions.

Support and training: uib offers phone and email support through support contracts, as well as training, workshops, and webinars.

Pricing

OPSI has free and paid annual licenses, with a 42-day trial. The two free plans serve different needs: Community allows unlimited devices and core features, but is limited to one worker process. Basic is also free and adds listed extensions, but caps use at 30 devices, one worker process, and one setup per user. Basic must be renewed each year and does not include support for non-free modules.

Professional costs €499 a year, with 100 devices shown and a minimum purchase of 100 devices. It includes listed extensions and up to two worker processes. This is a paid option for teams that need more processing capacity than the free plans provide, but the 100-device minimum makes it a poor fit for smaller fleets.

Enterprise costs €899 a year, also with a 100-device minimum. It includes 100 devices shown, unlimited worker processes, and extensions including the macOS Agent, SSO, and audit log. It is the more suitable tier when those capabilities or higher worker capacity matter; smaller organizations may find the minimum hard to justify.

Enterprise Cloud costs €1,199 a year and starts at 100 devices. It includes a managed OPSI server and listed cloud features and extensions, but supports product caching only, not configuration caching. Choose it for managed hosting if that caching limitation fits the deployment; otherwise, the self-managed plans avoid that particular trade-off. Professional and Enterprise license limits apply at 100 devices, and all devices managed with OPSI count toward extension licensing.

Platforms

OPSI supports Windows, Linux, and macOS endpoints and is offered as a hybrid deployment. Its platform range also includes API, web, and self-hosted access. The macOS Agent is included with Enterprise, so macOS-focused buyers should weigh that tier's price and device minimum rather than assume every plan provides the same macOS support.

Who it's for

OPSI is a strong candidate for IT teams that want one system for software deployment, OS installation, inventory, patching, and configuration, especially across multiple sites. Community's unlimited devices make it worth considering for organizations comfortable with core features and one worker process. Basic is better suited to a small setup of up to 30 devices that needs its listed extensions. Larger organizations should compare the paid tiers against their device count, worker needs, hosting preference, and extension requirements before committing.

Pros and cons

Pro: Combines software deployment, OS installation, inventory, patching, and configuration, reducing the need to split those jobs across separate tools.

Pro: Community supports unlimited devices at no charge, while multi-site administration accommodates local depots and packages.

Pro: Inventory can capture hardware data before an OS is installed, helping with initial provisioning.

Con: Basic is capped at 30 devices and one setup per user, and its annual renewal and non-free-module support exclusion complicate what might otherwise look like a simple free option.

Con: Professional and Enterprise require at least 100 devices, putting their annual prices beyond the needs of many small fleets.

Con: Enterprise Cloud does not provide configuration caching, a limitation to consider when evaluating its managed hosting.

Alternatives

For a tool focused on disaster recovery, consider Acronis Cyber Disaster Recovery Cloud: it is paid, has a free trial, and prices its listed disaster-recovery plan by pay-as-you-go use of cloud storage and compute.

iVentoy is a freemium alternative with a free edition capped at 20 clients and no commercial use, making OPSI the more relevant option for commercial endpoint management. For a free and open-source imaging choice, Clonezilla is another alternative. FOG Project may suit readers seeking free commercial use with free community support.

Canonical MAAS has a free Self-support plan for all machines, but it excludes HA, RBAC, a Knowledge Base, a Sev 1 response SLA, and phone or ticket support. Foreman is a free, self-managed option. For Windows PC backup rather than OPSI's broader client management scope, AOMEI Backupper has a perpetually free Standard plan. DeployR Enterprise is a paid alternative with a listed public-sector suite priced per endpoint.

For more options, browse OS Deployment Software, Patch Management Software, IT Automation Software, or Application Deployment Software.

Verdict

Choose OPSI if your IT team wants a broad, centrally managed toolkit for deploying software and operating systems, collecting inventory, and managing patches and configuration across sites. Community's unlimited-device allowance is a notable entry point, while paid tiers add capacity, extensions, or hosting. Look elsewhere if your fleet is too small to meet the paid-tier minimums, or if Enterprise Cloud's lack of configuration caching conflicts with your needs.

Verdict

OPSI covers deployment, installation, inventory, and configuration, with free and paid licensing options. Check device minimums and license conditions before choosing a paid tier.

Where Specifiction places it

Alternatives to OPSIAll alternatives →