up.time can monitor and gather performance data from a variety of platforms without requiring an up.time agent to be installed on the monitored system. This functionality is provided by using WMI or standard services and applications already available on the monitored system.
Note that up.time 5.3.x or greater and a Windows monitoring station is required to utilize WMI agentless monitoring.
Note: 
indicates limited support.
IBM pSeries Systems
| Platform and Version | up.time Version | ||||
| 7.2 | 7.1 | 7.0 | 6.x | 5.5 | |
| HMC V6R1.2 | | ||||
| HMC V6R1.3 | | | | | |
| HMC V7R3.x | | | | | |
| HMC v7R7.1.0 |  | | | | |
VMware Systems
| Platform and Version | up.time Version | ||||
| 7.2 | 7.1 | 7.0 | 6.x | 5.5 | |
| ESX / ESXi 3.5 | | | | | |
| ESX / ESXi 3.5 Updates 1, 2, 3, 4 | | | | | |
| ESX / ESXi 3.5 Update 5 | | | | | |
| ESX / ESXi 4.0 | | | | | |
| ESX / ESXi 4.0 Update 1 | | | | | |
| ESX / ESXi 4.0 Update 2 | | | | | |
| ESX / ESXi 4.1 | | | | | |
| ESX / ESXi 4.1 Update 1 | | | | | |
| ESX / ESXi 4.1 Update 2 | | | |||
| ESXi 5.0 | | | | ||
| ESXi 5.0 Update 1 | | | |||
| ESXi 5.1 | | | |||
| vCenter 2.5 (discovery only) | | | | ||
| vCenter 4 | | | | | |
| vCenter 5.0 | | | | ||
| vCenter 5.0 Update 1 | | | |||
| vCenter 5.1 | | | |||
WMI Monitoring
| Platform and Version | up.time Version | |||||
| 7.2 | 7.1 | 7.0 | 6.x | 5.5 | 5.4 | |
| Windows Server 2003 Enterprise / Enterprise R2 | | | | | | |
| Windows Server 2003 Standard / Standard R2 | | | | | | |
| Windows Server 2008 Enterprise / Enterprise R2 | | | | | | |
| Windows Server 2008 Enterprise R2 (core) | | | | | | |
| Windows Server 2008 Enterprise R2 SP1 / R2 SP1 (core) | | | | | | |
| Windows Server 2008 Standard / Standard R2 | | | | | | |
| Windows Server 2008 Standard R2 (core) | | | | | | |
| Windows Server 2008 Standard R2 SP1 / R2 SP1 (core) | | | | | | |
| Windows Server 2008 Web R2 / R2 (core) | | | | | | |
| Windows Server 2008 Web R2 SP1 / R2 SP1 (core) | | | | | | |
| Windows XP Professional | | | ||||
| Windows XP Professional SP1 / SP2 | | | ||||
| Windows XP Professional SP3 | | | | | | |
| Windows 7 Enterprise | | | | | | |
| Windows 7 Enterprise SP1 | | | | | | |
| Windows 7 Professional | | | | | | |
| Windows 7 Professional SP1 | | | | | | |
Agentless Platforms
up.time also provides basic monitoring capability for the following agentless platforms:
| System Protocol | Notes |
| Net-SNMP | up.time can gather basic performance data from any system running an SNMP daemon that presents information from the hoststatus.mib. |
| Novell Netware 6.5 NRM | up.time will access performance data from a Netware 6.5 system running NRM via an http or SSL connection. Authentication is required and the up.time user must log in with administrator privileges and access to the BasicHealth system screen. |
| Node Monitoring | up.time will perform service availability monitoring but not gather performance data from these systems. |