Methods, systems, and products are provided for peer-to-peer computer software installation. Embodiments include receiving, by an observing install agent running on an observing host from a test install agent running on a test host, performance information describing the performance of software installed on the test host; determining, by the observing install agent, whether the performance information meets performance criteria for the observing host; and if the performance information meets the performance criteria for the observing host, installing the software on the observing host. In some embodiments, determining, by the observing install agent, whether the performance information meets performance criteria for the observing host is carried out by determining, whether the performance information meets performance criteria for the observing host in dependence upon a rule.