Cacti

At a glance

• Editor score
  6.9 / 10
• Pricing
  Free plan
• Best for
  Free graphing and SNMP performance data
• Free plan
  Yes
• Paid from
  Free
• Synthetic checks
  Yes
• Founded
  2001
• Facts checked
  23 Sep 2026

• Where it wins

  • Free, open-source deployment with no fixed device entitlement
  • SNMP, ICMP, TCP, and UDP checks plus script-based collection
  • Templates, discovery, collectors, plugins, and aggregate graphs

• Where it doesn't

  • Self-hosted deployment requires infrastructure and administration
  • Core focus is narrower than modern alerting and topology platforms
  • Mapping and SMS alerting depend on plugins

Our verdict on Cacti

Cacti is a free, open-source network monitoring and graphing platform for teams that want to collect and visualize performance data in a self-hosted environment. Its monitoring inputs include SNMP OIDs, scripts, ICMP, TCP, and UDP, while RRDtool provides the graphing foundation. Device discovery, automated onboarding, graph trees, templates, role-based access controls, and distributed collectors support deployments from LAN-sized environments to networks containing tens of thousands of devices. It runs on Linux and Windows and is distributed under the GNU General Public License.

The platform fits organizations that already manage their own infrastructure and want detailed performance graphs rather than a fully managed monitoring service. Its ecosystem includes RRDtool, MySQL, MariaDB, Net-SNMP, Apache, and IIS. The plugin framework extends Cacti into areas such as fault management, logging, mapping, and NetFlow, while aggregate graphs combine traffic views across devices or interfaces. Email notifications can use PHP mail, Sendmail, or SMTP, and documented SMS alerting is available through plugins.

Cacti’s main strength is focused data collection and visualization: it gives network teams a structured way to gather SNMP performance data, apply reusable templates, discover devices, and distribute collection across remote sites. The trade-off is scope. Its feature set is less centered on modern alerting, topology, and broad integrations than platforms built around those workflows. Choose Cacti when free graphing, open-source control, and SNMP depth are the priority. Consider an alternative when you need a more unified topology, alerting, and integration experience without assembling capabilities through self-hosting and plugins.

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Cacti pricing

Cacti fact sheet

Alternatives to Cacti

• ZabbixBroad infrastructure monitoring with a free self-hosted edition and paid cloud options.9.4
• CheckmkA broad hybrid monitoring platform with a capable free edition and costly paid entry.9.3
• ManageEngine OpManagerBroad monitoring, mapping, traffic analysis, automation, and distributed coverage across four editions.9.1

See all Cacti alternatives →

Featured on iTechGuides

Cacti is listed in our Network Monitoring directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update