The core features of opsi are open source and free of license fees.
In addition, there are extensions that extend the free core of opsi. These are available per one-time payment or per subscription.

Currently following opsi extensions are available:

• Directory Connector: Transfer of client data from an LDAP-enabled directory service (i.e. ActiveDirectory or Samba 4) to opsi.
• License Management
• Linux Agent: Management of Linux-Clients.
• Local Image Backup: Rapid client restore of student computers.
• MySQL Backend for configuration data (for larger installations).
• Nagios Connector: Monitoring of opsi-server functionality, opsi rollouts, opsi clients.
• Scalability: For large installations.
• Support of opsi-clients connected via WAN. (To use the WAN extension the MySQL-Backend is a precondition).
• UEFI Support: Support of UEFI boot and GPT partition tables.
• User-Roles: The client visibility can be configured specifically per depot.
• Connecting opsi clients via WAN (using the WAN extensions requires the MySQL backend)
• WIM-Capture: Tool for reading out a Windows installation incl. hotfixes or further software and subsequent installtation on other computers

opsi Extensions as a subscription:

• the macOS-Client is offered exclusively as a subscription

The following extensions have been released and are now part of the free opsi core:

• opsiclientd (Vista / Windows 7)
• Software on Demand (Kiosk-Mode): Approved software may be requested for opsi installation by the end user
• Managing hierarchical groups (Treeview): hierarchical groups for clients and product-groups
• Dynamic depot selection: Automatic allocation of the best depot to a client
• User Profile Management: Modify user profiles in case of using roaming profiles
• Installation on Shutdown: Installation starts when the client shuts down.