OpenNMS is a Java-based network management system. Horizon and Meridian discover devices, poll SNMP, and correlate events at NOC scale. It is not a mechanic. Tink installs in one command, watches the Linux server, explains what is wrong, and helps you fix it.
Accidental sysadmins land on OpenNMS because it is open source and every NMS comparison lists it. When nginx is down, the disk will fill in six days, or SSH is being brute-forced, OpenNMS stays quiet unless that node is in a requisition, that service is collected, and someone is watching the alarm list.
Tink is the other job: detect the issue on the machine, say why it happened in plain English, propose the command, and run it only after you approve. Keep OpenNMS if you run SNMP estates and Minion sites. Use Tink if you run Linux servers and want a mechanic.
| Feature | Tink | OpenNMS |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | Hours to days — PostgreSQL, OpenNMS, Minions, requisitions, SNMP communities |
| What you get | Working monitoring, diagnosis, and approved fixes | Network/server discovery, events, alarms, and a ticket-shaped alert |
| Pricing | Free (Scout) / $9 / $29 per machine per month | Horizon is free; Meridian support and hardware for the Java stack add up |
| Hidden costs | None — fully managed | A dedicated OpenNMS host, JVM heap, PostgreSQL, Minions, and someone who speaks requisitions |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | SNMP, ICMP, JMX, and collectors into a central OpenNMS core |
| Configuration | None after install — heuristics and AI | Requisitions, foreign sources, collectd, threshd, notifications, and eventconf |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | No — events and alarms that still need an engineer |
| Fix execution | Proposes and executes approved commands with an audit trail | Monitoring only — you still SSH in |
| Alerting | Built-in across 8 channels | Notification strategies after you write destination paths and escalate |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Thresholds on collected SNMP if you defined them |
| SSH brute-force detection | Built-in — parses auth.log every scan | Not included unless you add a log adapter and write eventconf |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | Node down if ICMP/SNMP from the core or a Minion fails |
| Public status page | Shareable URL with 90-day history | Internal operator views — customer status is a different product |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | Not included — export a report from the database if someone remembers |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Add PagerDuty, email, or another on-call tool |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | Web UI and email/SNMP traps from the event bus |
| Learning curve | None — works after install | Steep — Java NMS, Minions, requisitions, and event correlation |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | NOC teams with SNMP estates, Minion sites, and a dedicated OpenNMS admin |
Keep OpenNMS when you already want that exact job:
Horizon is free. A working ops loop for five Linux boxes is not:
For a 5-server team, Tink Mechanic at $45/month is cheaper than the first afternoon of OpenNMS setup, and every scan includes a diagnosis the alarm list will never write.
No Minions. No requisitions. No JVM heap. One command install.
Try Tink free — one command installAlso compare: Tink vs LibreNMS · Tink vs Zabbix · Tink vs SolarWinds