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See our strategic direction across AI-native observability, full-stack signals, operational intelligence, and enterprise platform maturity.

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Best energy efficiency

True real-time per-second

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AI-powered troubleshooting from detection, to root cause and blast radius identification, to reporting.

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Live topology, flow analytics, and SNMP device and trap monitoring — unified with your full-stack observability.

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SOC 2 Type 2 certified with every metric kept on your infrastructure.

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800+ collectors and notification channels, auto-discovered and ready out of the box.

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Reduced monitoring costs by 46% while cutting staff overhead by 67%.

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No data shipping. No central storage costs. Query at the edge.

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So many out-of-the-box features! I mostly don't have to develop anything.

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Point-and-click troubleshooting. No PromQL, no LogQL, no learning curve.

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67% Less Staff, 46% Cost Cut

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20% less downtime and 40% budget optimization from out-of-the-box monitoring.

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Predictable per-node pricing for infrastructure monitoring. No per-metric or per-GB ingest charges for metrics and logs.

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Because monitoring 10 nodes is different from monitoring 10,000.

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Deploy in minutes. Impress clients in hours. Earn recurring revenue for years.

30-second live demos close deals
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Same engine, same dashboards, same ML. Just priced for tinkerers.

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Side-by-side comparisons: costs, real-time granularity, and data sovereignty for every major tool.

See why teams switch from Datadog, Prometheus, Grafana, and more.

> Browse all comparisons
Edge-Native Observability, Born Open Source
Per-second visibility, ML on every metric, and data that never leaves your infrastructure.
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Buyer’s Guide - October 2026

The 10 best storage monitoring tools for 2027

Storage monitoring splits into two jobs buyers routinely conflate: host-level telemetry (disk space, inodes, I/O latency, SMART and NVMe health) and array-level management (LUNs, pools and controllers on NetApp, Dell EMC, HPE and Pure arrays). This ranking grades ten tools on both, with collection resolution and capacity forecasting carrying the most weight, because full disks are predictable and I/O spikes are not.

The 10 best storage monitoring tools for 2027 product interface

Why this list exists

Most storage monitoring software shortlists mix two different product categories and let the reader sort it out. A host agent that watches disk space and I/O on your servers will not see inside a NetApp or Dell EMC array, and a storage resource management suite that maps LUNs and pools will not give you per-second latency histograms or SMART attributes on a Linux box. The classic buying mistake is picking one and assuming the other half is covered.

Three dimensions decide the outcome more than any feature checklist:

  1. Where your problem lives. If your incidents are full filesystems, inode exhaustion and I/O saturation on servers, a host-level tool wins. If your incidents are array contention and capacity across a multi-vendor SAN estate, you need array-level integrations via vendor APIs, not SNMP alone.
  2. Collection resolution. I/O bottlenecks are bursty. A tool polling every 1 to 5 minutes averages away the 10-second latency spike that stalled your database. Default collection interval is the sharpest differentiator in this category.
  3. How the bill grows. Sensor-count, disk-count, per-device and per-host models all scale differently against a storage fleet with thousands of disks. Model your fleet size before you sign anything.

We do not quote competitor list prices in this guide. They change, they are negotiated, and a stale number is worse than none. Instead we describe each vendor’s pricing shape and link the official pricing page on every card. The one exception is Netdata, where we can state our own pricing precisely.

This is the parent guide for storage. For narrower jobs, see our guides to disk health monitoring tools, NVMe SSD monitoring tools, ZFS monitoring tools, LVM monitoring tools and Ceph monitoring tools.

Methodology

How we evaluated storage monitoring tools

The shortlist came from practitioner threads (r/sysadmin, r/zabbix), existing roundups such as DNSstuff’s storage monitoring guide, and vendor documentation. Every tool here either ships meaningful storage coverage out of the box or is widely deployed for it.

Two criteria carry the most weight. Array and device coverage (25%) separates tools that see inside SAN/NAS hardware from those that only see host disks. Metric resolution (20%) separates per-second telemetry from minute-level polling, which decides whether you catch latency spikes at all. Capacity forecasting, alerting quality, deployment footprint, pricing predictability and setup effort make up the rest.

Tester credit

Compiled by the Netdata team - Updated October 14, 2026

Scoring criteria

  • Array and device coverage 25%
    SAN/NAS vendor integrations, LUN/pool/RAID visibility, SMART and NVMe health
  • Metric resolution and I/O latency detection 20%
    Per-second vs minute-level collection; bursty spikes vs averages
  • Capacity planning and forecasting 15%
    Growth trends and run-out prediction for disks and arrays
  • Alerting and anomaly detection 15%
    Thresholds plus detection of slow degradation
  • Deployment footprint and scalability 10%
    Agent vs agentless, self-hosted vs SaaS, behavior at fleet scale
  • Pricing model predictability 10%
    What the bill grows with: nodes, sensors, disks, devices
  • Ease of setup and maintenance 5%
    Time to first useful storage dashboard

Vendor 01 / 10 · #netdata

01

Netdata

Per-second disk, filesystem, SMART and NVMe telemetry on every node, with ML anomaly detection and capacity insights built in.

Netdata Insights capacity planning view showing storage and resource usage trends and forecasts across monitored nodes

Best for

  • Teams that need per-second disk I/O, latency and filesystem visibility across Linux and Windows fleets without assembling a monitoring stack
  • SRE and DevOps teams who want anomaly detection on storage metrics without hand-writing thresholds
  • Organizations that want telemetry kept on their own nodes rather than shipped to a SaaS

Pricing

  • Per-node pricing: Netdata Cloud Business from $4.5/node/month on annual plans, with the per-node price decreasing as node count grows
  • Agents are open source (GPLv3+) and free to self-host; Community plan is free for personal, non-commercial use with up to 5 active connected nodes
  • Not billed: metrics volume, Logs Monitoring (querying logs in place), users, data retention, containers; Logs Management is in Free Preview
  • Netdata Cloud Business offers a 14-day trial

Pros

  • Per-second collection of disk space, inodes, disk I/O, latency and filesystem metrics on every node, so short I/O spikes are visible instead of averaged away
  • Native S.M.A.R.T. monitoring via the smartctl collector for HDDs and NVMe devices, plus hardware sensors
  • eBPF-based disk latency histograms show read/write latency distribution, not just averages
  • Covers the whole storage stack out of the box: ZFS, LVM, Ceph and NVMe collectors alongside disks and filesystems
  • Unsupervised ML anomaly detection runs per metric on the node, flagging storage anomalies without centrally trained models; raw telemetry never leaves the host
  • Capacity planning insights and pre-configured disk space and inode alerts ship with the agent

Where it falls short

  • Array coverage is a mix of native collectors (Dell PowerStore, Dell EMC ScaleIO), SNMP device profiles (NetApp, Isilon, TrueNAS, Synology) and Prometheus exporters (NetApp ONTAP, SolidFire), so depth varies by vendor rather than following one storage-management model. Teams needing uniform LUN-level views across a large multi-vendor SAN estate often pair it with a dedicated array tool.
  • It is an infrastructure monitoring tool, not a storage resource management suite: storage chargeback, array configuration auditing and storage-specific compliance reporting are out of scope.

Verdict

Storage failures come in two shapes: slow, predictable capacity exhaustion and bursty I/O saturation. Netdata is the only tool in this list collecting per-second on every node, which is what catching the second kind takes, and it ships SMART, NVMe, ZFS, LVM and Ceph coverage with no plugin assembly. On-node ML flags slow degradation that fixed thresholds miss, and per-node pricing does not grow with how many disks or metrics you watch. The honest caveat: if your primary problem is managing a multi-vendor SAN estate at LUN and pool depth, pair Netdata on the hosts with SolarWinds SRM or LogicMonitor on the arrays.

Vendor 02 / 10 · #solarwinds-srm

02

SolarWinds Storage Resource Monitor

Dedicated multi-vendor SAN and NAS monitoring with LUN, pool and array-level performance and capacity views.

Best for

  • Storage teams running mixed-vendor SAN/NAS estates who need LUN, RAID and array detail in one console
  • Enterprises that need capacity forecasting and I/O hotspot detection across arrays

Pricing

  • Licensed by the number of hard drives and solid-state drives across monitored SAN/NAS systems, not by node count
  • Available as subscription or perpetual license; the bill grows with disk count, which adds up on large arrays
  • Part of the SolarWinds Platform, integrating with NPM and SAM under one license family

Pros

  • Agentless multi-vendor array monitoring: NetApp, Dell EMC (VNX, Unity, Isilon, PowerStore, VMAX), HPE (Nimble, 3PAR), IBM, Hitachi, Pure Storage and more
  • Tracks IOPS, service time, I/O response time, queue length, throughput and disk utilization down to LUNs, RAIDs and arrays
  • Real-time hotspot detection surfaces I/O contention across arrays, pools and LUNs
  • Automated storage capacity planning and forecasting for NAS and SAN

Cons

  • Windows-server based deployment with a SolarWinds Platform footprint to maintain; reviewers note setup time varies by array vendor
  • Disk-count licensing means very large arrays drive the license up quickly
  • Not a host telemetry tool: per-second I/O, SMART health and eBPF latency on servers are outside its focus

Verdict

If your storage problem is the array, this is the most complete pure-play answer on the list. SRM is the only tool here built from the ground up for multi-vendor SAN/NAS resource monitoring, with the LUN and pool-level performance views and capacity forecasting that host agents cannot produce. You pay for that depth in platform footprint and disk-count licensing, and you still need something else for per-second host disk telemetry. For array-heavy estates, that split is usually worth it.

Vendor 03 / 10 · #logicmonitor

03

LogicMonitor

SaaS observability with vendor-maintained LogicModules for NetApp, Dell EMC, HPE, Pure Storage, Nutanix and vSAN.

Best for

  • Enterprises that want maintained SAN/NAS integrations without running their own monitoring servers
  • Hybrid estates spanning on-prem arrays, hypervisors and cloud storage

Pricing

  • Subscription priced in Hybrid Units; one unit covers one on-prem collector-monitored device, with conversion rates for cloud resources
  • Per-device model; G2 reviewers note it can be hard to justify for small footprints
  • Bill grows with monitored device count and datasource collection volume

Pros

  • Built-in support for NetApp (including E/EF-Series via SANtricity), Dell EMC (Unity, ECS), HPE 3PAR, Pure Storage, Cisco HyperFlex, Nutanix and VMware vSAN
  • Array-level metrics: storage capacity, pools, replication groups, node disks and processes
  • Collector-based architecture with API data collection for NetApp
  • Cloud-delivered: no central monitoring server to size and patch

Cons

  • Per-device subscription pricing is a recurring complaint among smaller organizations on G2
  • Collection intervals are datasource-defined and commonly several minutes, so it is not a per-second telemetry tool
  • Requires on-prem collector appliances for array access

Verdict

LogicMonitor is the strongest way to get vendor-maintained array coverage without hosting the monitoring stack yourself. Its LogicModules cover the major SAN/NAS vendors through their own APIs, which beats hand-building SNMP templates. The trade-offs are per-device pricing that penalizes small footprints, minute-level collection that misses bursty I/O, and collector appliances you still operate on-prem. A solid pick when SaaS delivery and array depth both matter.

Vendor 04 / 10 · #prometheus-grafana

04

Prometheus + Grafana

The open-source metrics stack: node_exporter for disk and I/O, smartctl_exporter for SMART/NVMe, Grafana for dashboards.

Best for

  • Engineering teams comfortable running their own monitoring stack who want full control
  • Kubernetes and cloud-native environments where Prometheus is already the standard

Pricing

  • Open source and self-hosted: you operate Prometheus, the exporters and Grafana, and the cost is engineering time, storage sizing and upkeep
  • Grafana Cloud is the hosted route, usage-based on series and logs
  • No per-host license; self-managed cost grows with scrape targets and retention

Pros

  • node_exporter exposes filesystem, disk I/O and utilization metrics on every Linux host
  • smartctl_exporter wraps SMART and NVMe health as Prometheus metrics, with ready Grafana dashboards
  • Mature community dashboards for disk performance, utilization and saturation
  • Practitioners call it the gold standard, while noting the setup effort

Cons

  • Assembly required: exporters, scrape configs, recording rules, dashboards and alert rules are all DIY; no vendor-maintained SAN/NAS integration exists
  • Default scrape interval is 1 minute, and long-term storage is a separate project (Thanos, Mimir, VictoriaMetrics)
  • No out-of-the-box capacity forecasting or anomaly detection; both must be built or added

Verdict

For host-level disk, filesystem and SMART metrics, Prometheus plus Grafana can match anything here if your team builds and maintains it. That is the catch: everything is a component you choose, wire and patch, and there is no array-level coverage without another exporter ecosystem. Capacity forecasting and anomaly detection are projects, not features. Pick it when control matters more than time-to-value and the staffing exists to own it.

Vendor 05 / 10 · #zabbix

05

Zabbix

Open-source infrastructure monitoring with native SMART templates, filesystem and disk I/O items, and community SAN/NAS templates.

Best for

  • Teams with monitoring engineering capacity who want full control and no license bill
  • Mixed estates of servers, network devices and storage under one self-hosted system

Pricing

  • Open source and self-hosted (AGPLv3 from version 7.0); no license fees
  • The real cost is server sizing, template maintenance and staffing
  • Optional paid official support and consulting from Zabbix

Pros

  • Official S.M.A.R.T. monitoring template via Zabbix Agent 2 covering HDDs, SSDs and eMMC without external scripts
  • Filesystem, disk space and disk I/O items with low-level discovery across Linux, FreeBSD and Windows
  • Large template ecosystem for storage devices, including community SANtricity and NetApp templates
  • Practitioners praise its customizability for storage and device monitoring

Cons

  • Default item intervals are typically a minute or more, so bursty I/O behavior is under-sampled
  • SAN/NAS coverage depends on community templates; r/zabbix threads show admins hand-building templates from MIB files
  • Meaningful setup and maintenance effort; built-in dashboards are commonly replaced with Grafana

Verdict

Zabbix earns its rank on native SMART monitoring via Agent 2 and proven filesystem and disk I/O monitoring at scale, with no license cost. Its weaknesses are structural: minute-level defaults hide latency spikes, and array coverage is as good as the community template you find or build. It rewards teams that treat monitoring as an engineering discipline and punishes those who want storage dashboards on day one.

Vendor 06 / 10 · #checkmk

06

Checkmk

Agent-based IT monitoring with 2,000+ vendor plugins including a NetApp ONTAP special agent and filesystem and SMART checks.

Best for

  • Teams that want deep, prebuilt storage hardware checks from a large maintained plugin catalog
  • Mixed estates where one tool monitors servers, NetApp filers, switches and databases

Pricing

  • Commercial editions priced per monitored host and service count, which grows with filesystems and volumes per host
  • Open-source Raw edition (GPLv2, self-hosted) alongside commercial editions
  • Checkmk Cloud available as a SaaS subscription

Pros

  • NetApp ONTAP special agent via REST API, with checks for aggregates, volumes, MetroCluster, NVRAM battery and snapshot reserve
  • Monitors classic SAN access directly through the Checkmk agent without extra plugins
  • 2,000+ vendor-maintained plugins including Nimble Storage latency and volume checks
  • Filesystem usage checks with warning and critical levels and snapshot-reserve awareness

Cons

  • Check cycle is around one minute by default, so it is not a per-second I/O latency tool
  • Service-count pricing grows quickly on storage hosts with many filesystems and volumes
  • The open-source Raw edition lacks some commercial features such as advanced dashboards and support

Verdict

Checkmk’s strength is check depth: the NetApp ONTAP special agent and the plugin catalog give you vendor-aware hardware health that generic SNMP tools miss. It thinks in states and thresholds rather than high-resolution time series, so it tells you a disk is sick more readily than it shows you a latency spike developing. A good fit for hardware-health-first teams, priced in a way that rewards keeping service counts lean.

Vendor 07 / 10 · #prtg

07

Paessler PRTG Network Monitor

Sensor-based monitoring with native sensors for disk space, SAN, NAS and NetApp devices via WMI, SSH and SNMP.

Best for

  • Small to mid-size environments wanting agentless storage monitoring alongside network monitoring in one tool
  • Admins who prefer per-value sensors and simple threshold alerts over a full observability platform

Pricing

  • Licensed by sensor count; every monitored value (a disk, a volume, a NetApp disk) is one sensor, so storage estates consume sensors fast
  • A limited freeware edition capped by sensor count; commercial licenses are subscription tiers sized by sensor count
  • A time-limited trial of the full product reverts to the freeware edition when it ends

Pros

  • Native sensor types for SAN and NAS: SNMP NetApp Disk Free, SNMP Disk Free (v2), SSH SAN Logical Disk, WMI Volume and WMI Logical Disk I/O
  • Agentless collection via WMI for Windows, SSH for Linux, SNMP for network-attached storage
  • Dedicated SAN monitoring and Synology NAS monitoring guides with vendor-neutral SNMP sensors
  • Repeatedly recommended in r/sysadmin threads for storage and network monitoring

Cons

  • Sensor licensing makes large storage estates expensive: every disk, volume and array metric is a billable sensor
  • Per-sensor polling intervals of a minute or longer average away short I/O spikes
  • No SMART attribute or NVMe health collection without external scripts

Verdict

PRTG is the fastest route to agentless capacity and availability monitoring for disks, volumes and NAS boxes, and the NetApp sensors are genuinely useful. Two structural limits cap its rank: sensor-count pricing scales directly against storage fleets, and minute-level polling with no SMART health means it watches capacity, not disk condition or latency. Right-sized for small and mid-size estates; model the sensor count before expanding.

Vendor 08 / 10 · #datadog

08

Datadog

SaaS observability whose agent collects disk usage and I/O per host, with SNMP-based NetApp integration and cloud storage monitoring.

Best for

  • Cloud-native and hybrid organizations already standardizing on Datadog
  • Teams that want storage metrics correlated with applications, APM and logs in one SaaS

Pricing

  • Per-host infrastructure pricing, with each additional product (APM, logs, synthetics) billed separately on top
  • Volume-based charges for logs and for custom metrics beyond the per-host allocation
  • Bill grows with host count, product mix and data volume; third-party analyses consistently flag multi-product cost stacking

Pros

  • Disk integration collects disk usage and I/O metrics on every monitored host
  • SNMP-based NetApp integration for array metrics
  • 15-second agent collection interval, finer than most polling tools
  • Cloud storage monitoring for AWS, Azure and GCP storage services alongside on-prem hosts

Cons

  • No vendor-specific SAN/NAS depth beyond generic SNMP: LUN, pool and controller views for Dell EMC, HPE or Pure are not shipped
  • No native SMART/NVMe health collection; disk health beyond usage and I/O requires custom checks
  • Per-host plus per-product pricing grows quickly across large fleets and multiple products

Verdict

As a storage tool, Datadog is a side effect of its agent: you get 15-second disk usage and I/O on hosts you already monitor, plus solid cloud storage coverage. That is genuinely useful if Datadog is your platform, and hard to justify if storage is the only problem you are solving. Array monitoring is generic SNMP, SMART health is DIY, and the bill stacks per product. Best when storage is one signal among many you already send there.

Vendor 09 / 10 · #opmanager

09

ManageEngine OpManager

Network and infrastructure monitoring with a storage add-on covering RAID, SAN switches, tape libraries and capacity forecasts.

Best for

  • Network-centric IT teams that want storage, RAID and SAN switch monitoring inside their existing network monitor
  • Organizations standardized on ManageEngine tooling

Pricing

  • Device-based licensing: price depends on monitored device count, with components (interfaces, ports, disks) included per device
  • Three editions (Standard, Professional, Enterprise) with add-ons such as the storage monitoring module
  • Bill grows with device count and edition tier

Pros

  • Storage add-on covers RAID arrays with per-disk, LUN and chassis hardware health visibility
  • SAN monitoring for RAID, tape libraries and FC/SAN switches from a unified console
  • Capacity utilization reports and growth-trend forecasting for storage purchases
  • Vendor coverage for NetApp disk utilization and capacity planning

Cons

  • Storage monitoring is an add-on to a network product, so per-array depth is thinner than dedicated tools like SolarWinds SRM
  • Threshold-based polling at minute-level intervals, not per-second telemetry
  • Device-based licensing grows with every added storage device and switch

Verdict

OpManager makes sense when storage is one responsibility of a network team, not a specialty. The storage add-on covers RAID health, SAN switches and capacity forecasting credibly, and having it in the same console as switches and routers is the point. Array performance depth and collection resolution are both a tier below the dedicated tools, which is exactly the trade its target buyer accepts.

Vendor 10 / 10 · #nagios-xi

10

Nagios XI

Established self-hosted monitor with check_disk for filesystems and a large community plugin ecosystem for NetApp, SAN and NAS hardware.

Best for

  • Teams with existing Nagios investments and plugin expertise
  • Organizations wanting a perpetual-license, self-hosted monitor for storage capacity and hardware health

Pricing

  • Perpetual license priced by node count (any unique IP or URL); Enterprise edition adds capacity planning and reporting per tier
  • Free edition capped at a small node and service count; Nagios Core remains open source and self-hosted
  • Bill grows with node count and edition tier

Pros

  • check_disk ships with Nagios XI for filesystem capacity, with capacity planning reports built on months of check history
  • Nagios Exchange lists 170+ SAN/NAS plugins including NetApp (volume usage, failed disks, shelf health), EMC Clariion, IBM and ZFS checks
  • NetApp SANtricity plugin monitors arrays, controllers, fans, batteries, PSUs and disk drives
  • Performance data from every disk check feeds growth-trend capacity reports

Cons

  • Storage coverage depends on community plugins of varying quality and age; Nagios itself warns admins to vet Exchange plugins before production use
  • Default check intervals are typically 5 minutes, so bursty I/O behavior is invisible
  • The default check_disk covers only the root filesystem; each volume needs its own manually configured check

Verdict

Nagios XI is the oldest approach on this list and it shows, in both directions. The plugin ecosystem has real SAN/NAS depth built up over many years, and capacity reporting from check history works. But 5-minute defaults, per-volume manual configuration and community-plugin quality risk make it the most labor-intensive way to monitor storage in 2027. It ranks last for new deployments, not for teams already fluent in it.

Frequently asked questions