Kaseya VSA is a remote monitoring and management (RMM) platform that lets IT teams, mainly managed service providers, administer endpoints remotely. According to Kaseya it provides automated patching of operating systems and applications, real-time monitoring with alerts and auto-remediation, policy-based automation, IT asset and licence inventory, mobile device management, secure remote control, and integrations with PSA, backup and security tools. Kaseya describes VSA as a cloud-based solution; according to Wikipedia it can also be installed on-premises.
Kaseya Limited is a privately held company headquartered in Miami, Florida, with Insight Partners as majority owner. As a US company, Kaseya is subject to the US CLOUD Act, including for data stored outside the United States. The product page does not say where SaaS data is hosted, so a European organisation should ask the vendor to confirm and contractually fix the hosting region. Using VSA also gives a US-based provider a management channel into the whole managed device estate. VSA is not open source.