Zabbix vs Cacti: Network Monitoring Compared

Feature Comparison

Feature	Zabbix	Cacti
Primary focus	Full infrastructure monitoring	RRDtool-based graphing
SNMP support	SNMPv1/v2c/v3 with auto-discovery	SNMPv1/v2c/v3 with Spine poller
Alerting	Built-in (email, SMS, webhooks, scripts)	Plugin-based (Thold plugin)
Agent support	Zabbix Agent / Agent 2	No native agent
Auto-discovery	Network discovery + LLD rules	Limited (device templates)
Web UI	Modern, full-featured dashboard	Functional but dated
Graphs	Built-in + Grafana integration	RRDtool graphs (core strength)
Templates	500+ official templates	Community graph templates
API	Full REST API	Limited API
Clustering	HA with Zabbix Proxy	Remote pollers (community Docker)
Database	PostgreSQL, MySQL/MariaDB, TimescaleDB	MySQL/MariaDB only
License	AGPL-3.0	GPL-2.0

Quick Verdict

Want full-stack infrastructure monitoring with alerting, auto-discovery, and agent-based collection? Deploy Zabbix. Want lightweight SNMP graphing for network device metrics with beautiful RRDtool graphs? Cacti still does that job well — but its age shows in every other area.

Overview

Zabbix is a comprehensive monitoring platform that tracks servers, networks, applications, and cloud services through agents, SNMP, IPMI, and HTTP checks. It handles the entire monitoring lifecycle: data collection, threshold evaluation, alerting, and visualization.

Cacti started in 2001 as a frontend for RRDtool — the industry-standard time-series graphing engine. Its core competency is polling SNMP devices on a schedule and rendering the resulting data as graphs. Over two decades, plugins have extended Cacti with alerting (Thold), network weathermaps, and syslog collection, but the architecture remains graph-centric.

Installation Complexity

Zabbix

Zabbix deploys as a multi-container stack: server, web frontend, database, and optionally SNMP traps and agent.

services:
  zabbix-server:
    image: zabbix/zabbix-server-pgsql:alpine-7.4.8
  zabbix-web:
    image: zabbix/zabbix-web-nginx-pgsql:alpine-7.4.8
  postgres:
    image: postgres:17-alpine

Initial setup imports a large database schema (takes 2-3 minutes on first run). Default login is Admin / zabbix. The web UI immediately offers host creation, template assignment, and monitoring configuration.

How to Self-Host Zabbix

Cacti

Cacti uses a community-maintained Docker image — no official image exists from the Cacti project:

services:
  cacti:
    image: smcline06/cacti:1.2.17
  cacti-db:
    image: mariadb:11.8

First boot takes 5-10 minutes while the database schema initializes. The web installer walks through license acceptance, dependency checks, and database configuration. Default login is admin / admin. SNMP polling starts after adding devices and associating graph templates.

Verdict: Zabbix’s official Docker images and guided setup are more polished. Cacti’s reliance on community Docker images adds uncertainty, though the smcline06/cacti image is well-maintained.

Performance and Resource Usage

Resource	Zabbix	Cacti
RAM (idle)	~800 MB (server + web + DB)	~512 MB (app + DB)
RAM (100 hosts)	1.5–2 GB	800 MB–1 GB
RAM (1000 hosts)	4–8 GB	2–3 GB
CPU	Moderate (C-based server)	Low (PHP + Spine poller)
Disk (per day, 100 hosts)	200–500 MB	50–100 MB (RRD files are compact)
Polling architecture	Multi-threaded C preprocessor	Spine (C-based) or cmd.php

Cacti is lighter because RRDtool files are inherently space-efficient — they use fixed-size databases that consolidate old data automatically. Zabbix stores all historical data in the relational database, which grows without housekeeping configuration.

For large-scale SNMP polling (1,000+ interfaces), Cacti’s Spine poller is highly efficient. Zabbix handles similar scale but with higher memory overhead due to its broader data model.

Community and Support

Metric	Zabbix	Cacti
GitHub stars	~5.5K	~1.6K
First release	2001	2001
Latest release	7.4.8 (March 2026)	1.2.17 (2021)
Release cadence	Regular (monthly patches)	Infrequent (quarterly+)
Commercial support	Zabbix LLC (enterprise plans)	None (community only)
Official Docker	Yes (multiple variants)	No (community images only)
Documentation	Extensive, current	Adequate, sometimes dated
Plugin ecosystem	Integrations + templates	Plugins (Thold, Weathermap, etc.)

Zabbix has a dedicated company behind it with paid support, training, and certification. Cacti is a pure community project with slower development cadence. Both have been around since 2001, but Zabbix has evolved into an enterprise platform while Cacti has remained focused on its graphing roots.

Use Cases

Choose Zabbix If…

• You need full infrastructure monitoring beyond just SNMP (servers, VMs, containers, cloud)
• Alerting with escalation policies and on-call integration is required
• You want auto-discovery to find new hosts and interfaces automatically
• You need an agent for monitoring system internals (disk, CPU, processes, logs)
• You’re monitoring 100+ devices and need a scalable platform
• You want official Docker images and enterprise support options

Choose Cacti If…

• Your primary need is SNMP-based graphing of network device interfaces
• You want compact, efficient storage with RRDtool’s fixed-size databases
• You’re monitoring primarily network switches, routers, and bandwidth utilization
• You prefer a lightweight tool that does one thing well
• You have experience with RRDtool and want a web frontend for it
• Resource usage must be minimal (small VPS or Raspberry Pi)

Final Verdict

Zabbix is the practical choice for self-hosted network monitoring in 2026. It covers SNMP polling, agent-based monitoring, alerting, and visualization in a single platform with official Docker support. If Cacti didn’t exist and you needed to solve “monitor my network,” Zabbix is what you’d find and deploy.

Cacti retains value for pure SNMP graphing — its RRDtool integration produces excellent bandwidth graphs with minimal resource overhead. But the lack of official Docker images, limited alerting (plugin-dependent), and slower development pace make it harder to recommend for new deployments. If you’re already running Cacti and it meets your needs, keep it. For new setups, start with Zabbix.

FAQ

Can Zabbix replace Cacti for SNMP graphing?

Yes. Zabbix supports SNMP v1/v2c/v3, has extensive MIB support via templates, and can generate per-interface bandwidth graphs. The graphs won’t look identical to RRDtool output, but Zabbix graphs (or Grafana integration) are fully capable replacements.

Is Cacti still maintained?

Yes, but development is slow. The community Docker image (smcline06/cacti) was last updated in 2021 with version 1.2.17. Cacti 1.2.x continues receiving upstream patches from the Cacti project, but the Docker ecosystem lags behind. Core functionality works, but new features are rare.

Which is better for monitoring 10 switches?

Either works for 10 switches. Cacti is lighter and the setup is simpler if you only need bandwidth graphs. Zabbix gives you alerting and auto-discovery that you’ll appreciate as the network grows.

Can I run both?

You can, but there’s little reason to. The main scenario is migrating from Cacti to Zabbix — run both during the transition period, then retire Cacti once you’ve confirmed all graphs and alerts are replicated.

Related

• How to Self-Host Zabbix
• Zabbix vs LibreNMS
• NetBox vs phpIPAM
• Best Self-Hosted Network Monitoring
• Docker Compose Basics
• Reverse Proxy Setup