komari
Komari is a self-hosted server monitoring tool built in Go that provides lightweight performance tracking via a web dashboard and agent-based data collection. It supports remote control capabilities and is designed for administrators to monitor systems they own or are authorized to manage.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | komari-monitor/komari |
| Owner | komari-monitor |
| Primary language | Go |
| License | MIT — OSI-approved |
| Stars | 5.3k |
| Forks | 502 |
| Open issues | 69 |
| Latest release | 1.2.5 (2026-06-21) |
| Last updated | 2026-07-08 |
| Source | https://github.com/komari-monitor/komari |
What komari is
Go-based monitoring server with a web UI (built with Node.js frontend) and lightweight agent architecture; agents report metrics to a central dashboard on port 25774. Supports Docker, binary, and systemd-based deployment; data persisted locally. Includes remote control functionality with Windows login notification warnings.
Get the komari source
Clone the repository and explore it locally.
git clone https://github.com/komari-monitor/komari.gitcd komari# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Install script targets systemd-based Linux; Windows and macOS binary support exists but may require manual configuration. Docker is simplest entry point.
- Default credentials are generated on first run; set strong custom credentials via ADMIN_USERNAME and ADMIN_PASSWORD environment variables before exposing to network.
- Agents require network access to central server on port 25774; configure firewall rules and consider reverse proxy/TLS termination for internet-facing deployments.
- Data is stored in local filesystem (./data folder); ensure adequate disk space, backups, and permission management, especially for long-running monitoring.
- Remote control feature introduces attack surface; disable if not needed, audit user access regularly, and restrict to trusted networks or VPN.
When to avoid it — and what to weigh
- Enterprise Multi-Tenancy Requirements — Komari appears designed for single-organization self-hosted use; no indication of RBAC, audit logging, or multi-tenant isolation suitable for managed service providers.
- Compliance-Heavy Environments — Unknown support for audit trails, data retention policies, encryption at rest, or compliance certifications (SOC2, HIPAA, PCI-DSS); requires detailed security review before regulated use.
- High-Cardinality or High-Scale Monitoring — No benchmarks provided on ingestion rates, query performance, or retention limits; unclear if suitable for 1000+ nodes or metrics-heavy workloads.
- Distributed Teams with Weak Trust Boundaries — Remote control features and the noted risk of C2 agent abuse mean careful access control and network isolation are essential; not suitable if access cannot be tightly governed.
License & commercial use
MIT License: permissive open-source license allowing free use, modification, and distribution (including commercial) with no warranty and attribution requirement.
MIT License permits commercial use without royalty or vendor approval. However, the explicit warning against weaponization and C2 abuse implies users must ensure legitimate, authorized deployment. Recommend internal legal/compliance review before deploying in revenue-critical or sensitive environments; no SLA, support contract, or liability framework documented.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Good |
| Assessment confidence | High |
Project explicitly warns against unauthorized deployment and C2 abuse; Windows clients show login notification to alert users to remote control. No details on: authentication strength (e.g., MFA), encryption in transit or at rest, input validation, or vulnerability disclosure process. Agent-to-server communication mechanism (TLS, mTLS, API key) not specified in README. Before production use, audit agent update mechanism, credential handling, and network isolation; consider restricting to internal networks or VPN.
Alternatives to consider
Prometheus + Grafana
Industry-standard, cloud-native monitoring with superior scalability, query language (PromQL), and ecosystem. Steeper learning curve; requires separate time-series DB and alertmanager.
Zabbix
Enterprise-grade self-hosted monitoring with built-in alerting, custom dashboards, and multi-tenant support. More complex; higher resource overhead than Komari.
Netdata
Lightweight, real-time monitoring with minimal dependencies; similar low-footprint philosophy. Stronger focus on per-node visualization; less centralized control than Komari.
Build on komari with DEV.co software developers
Start with Docker for fastest setup, or contact us to review security and integration requirements for your infrastructure.
Talk to DEV.coRelated on DEV.co
Explore the category and the services that help you build with it.
komari FAQ
Can I use Komari to monitor systems I do not own or without consent?
What is the default port and how do I change it?
Does Komari support clustering or high availability?
How do I secure agent-to-server communication?
Custom software development services
Need help beyond evaluating komari? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and open-source observability integrations — and maintain them long-term.
Ready to Deploy Komari?
Start with Docker for fastest setup, or contact us to review security and integration requirements for your infrastructure.