OpenNMS vs Wazuh

OpenNMS is an open-source platform for monitoring faults, performance, traffic, and alarms across local and distributed networks. Horizon is the free community distribution with the newest features; Meridian is the stable subscription version. Data collection supports SNMP, JSON, WinRM, XML, SQL, JMX, SFTP, FTP, JDBC, HTTP, HTTPS, VMware, WS-Management, and Prometheus. Traffic monitoring handles NetFlow v.5/9, IPFIX, and sFlow, with stated capacity above 300,000 flows per second. Minions extend monitoring to remote devices and services, including locations behind firewalls or NAT through ActiveMQ or Apache Kafka. Integrations include email, Slack, Mattermost, scripts or webhooks, Jira, Remedy, TSRM, Grafana, and a REST API. Grafana views can show alarms, outages, KPIs, NetFlow, and data from multiple instances. The software supports API, Linux, self-hosted, and web deployments. Horizon is free; Meridian plans range from $6,000 a year to $66,000 a year, with larger deployments priced on request.

Wazuh unifies XDR and SIEM to analyze security data across endpoints, clouds, and networks for threat detection, incident response, and compliance work. Its rules identify errors, misconfigurations, malicious activity, and policy violations in operating system and application logs. File Integrity Monitoring tracks changes to content, permissions, ownership, and other file attributes. Vulnerability detection compares endpoint software inventories with updated CVE databases. Built-in active responses can take countermeasures, including blocking network access from a threat source. Wazuh can monitor AWS, Microsoft Azure, Google Cloud, Microsoft 365, and GitHub services, virtual machines, and activity. Its integrations guide also covers Elastic Stack, OpenSearch, Splunk, and Amazon Security Lake. Default rulesets provide mappings for PCI DSS, HIPAA, NIST 800-53, TSC, and GDPR, but those mappings do not themselves certify compliance. Wazuh runs on API, Linux, macOS, self-hosted, web, and Windows platforms. Its self-hosted open-source plan is free; paid plans start at $571 a month, and a 14-day trial is listed. Agents support Linux, Windows, macOS, Solaris, AIX, and HP-UX and require an average of 35 MB of RAM.