Updated October 2026
Best infrastructure monitoring tools 2026: 20 ranked by the Infrastructure Monitoring Ledger
The best infrastructure monitoring tools in 2026 by Ledger Index are Zabbix (79.4), Grafana Labs (75.4), ManageEngine (75.1), out of 20 scored in the Infrastructure Monitoring Ledger. Scores come from public release records only; no vendor pays for placement.
Open-source workhorse, public roadmap
Composable observability stack
Broad suite, steady builds
Full ranking
| # | Product | Index /100 | Capability /100 | Credibility /25 | Commercial risk /25 | Lock-in /25 | User rating |
|---|---|---|---|---|---|---|---|
| 1 | Zabbix Open-source workhorse, public roadmap | 79.4 | 83.4 | 23.5 | 3 | 4 | none yet |
| 2 | Grafana Labs Composable observability stack | 75.4 | 77.8 | 22 | 9.5 | 5.5 | none yet |
| 3 | ManageEngine Broad suite, steady builds | 75.1 | 86.2 | 20.5 | 6.5 | 9.5 | none yet |
| 4 | Checkmk Open-core platform, steady shipper | 73.6 | 79.2 | 21.5 | 7.5 | 7 | none yet |
| 5 | Centreon Sovereign open-core challenger | 73.3 | 78.6 | 20.5 | 11.5 | 7 | none yet |
| 6 | Elastic Logs-first observability platform | 73 | 81.2 | 21 | 8.5 | 11 | none yet |
| 7 | ScienceLogic MSP-grade AIOps platform | 71.2 | 88.2 | 19 | 15 | 17 | none yet |
| 8 | SolarWinds Broad incumbent, private-equity owned | 68.3 | 89.4 | 19.5 | 16 | 14 | none yet |
| 9 | IBM SevOne / Netcool Carrier NOC suite, consolidating | 66.6 | 85.4 | 17 | 15.5 | 18 | none yet |
| 10 | OpenNMS Open-source network NOC platform | 65.2 | 75.8 | 19.5 | 10 | 9 | none yet |
| 11 | Nagios XI Legacy core, late modernisation | 64.6 | 69.4 | 18.5 | 7.5 | 4.5 | none yet |
| 12 | Icinga Pure open-source check engine | 64.2 | 67.6 | 18.5 | 5 | 6.5 | none yet |
| 13 | Broadcom DX Carrier-grade suite for top accounts | 61 | 87 | 16.5 | 21 | 17.5 | none yet |
| 14 | Netdata Per-second agent with on-device ML | 60 | 65.2 | 19.5 | 12 | 7 | none yet |
| 15 | PRTG Sensor-priced mid-market favourite | 59.6 | 74.2 | 18.5 | 16 | 13.5 | none yet |
| 16 | LibreNMS Community SNMP network monitor | 59.1 | 67.6 | 19.5 | 11 | 4.5 | none yet |
| 17 | Opsview Rebuilt Nagios heir, PE-owned | 58.3 | 74.6 | 16.5 | 14.5 | 13 | none yet |
| 18 | Prometheus Cloud-native metrics engine | 57.5 | 45 | 21 | n/a | 5 | none yet |
| 19 | SCOM Windows estate maintenance incumbent | 54 | 67.8 | 16.5 | 10 | 16 | none yet |
| 20 | WhatsUp Gold Windows-bound network monitor | 53.5 | 66 | 14.5 | 11.5 | 12.5 | none yet |
Risk and lock-in: lower is better. Source: Infrastructure Monitoring Ledger 2026, methodology.
Not sure which one fits you?
Describe what you run and the free advisor ranks these infrastructure monitoring tools for your case, with a setup plan as a short video.
Open the advisorCompare in the interactive Ledger
Sort by any score, see each product's record year by year and download the data as CSV or JSON.
Open the Infrastructure Monitoring LedgerQuestions
What is the best monitoring tool in 2026?
Zabbix has the highest Ledger Index (79.4 out of 100) in the Infrastructure Monitoring Ledger, followed by Grafana Labs (75.4) and ManageEngine (75.1). The best choice for you depends on your size, skills and budget, which the free advisor weighs for you.
How are the scores calculated?
The Ledger Index adds capability (what shipped, by domain and year), release credibility, commercial risk, technical lock-in and AI delivery, all from public release notes, roadmaps and pricing pages. The methodology page explains every score.
Can vendors pay to be listed or ranked?
No. Mr.PlanB takes no vendor money for listings, rankings or reviews, and the scores use no vendor briefings.
Who writes the user reviews?
Anyone who has used the product. Reviews are anonymous, need no account, and are checked by a person before they appear. Adverts, spam and personal attacks are removed.