Which network monitoring tools are known for high availability and government hosting options?

Network monitoring tools that are commonly recognized for high availability and/or government hosting / compliance-friendly deployment options include:

• SolarWinds Network Performance Monitor (NPM)
  Often deployed in enterprise and government environments; supports resilient architectures and has Federal/GovCloud-style hosting options through related SolarWinds offerings and deployment models.

• PRTG Network Monitor
  Can be deployed on-premises with redundant failover setups; suitable for organizations that need to keep monitoring data fully under their control, which is often important for government use.

• ManageEngine OpManager
  Offers high-availability configurations and on-prem deployment, with options that fit organizations needing tighter control over data residency and security.

• Zabbix
  Open-source and often used in regulated environments because it is self-hosted and highly customizable; high availability can be designed into the deployment.

• Nagios XI / Nagios Core
  Common in environments requiring on-premises control and custom HA via clustering or redundancy; often chosen by public-sector teams.

• LogicMonitor
  A SaaS-based monitoring platform with high availability built into the service; for government use, it is often evaluated alongside public sector cloud/compliance programs depending on region and contract.

• Datadog
  Strong built-in service availability and reliability; government suitability depends on the specific government cloud / compliance offering and deployment requirements.

If you want, I can narrow this down to:

1. fully self-hosted tools,
2. tools with explicit government cloud options, or
3. best choices for FedRAMP / public-sector compliance.