Komiser — Open-Source Cloud Cost and Resource Inspector

Introduction

Komiser is a self-hosted tool that connects to your cloud accounts and provides a unified dashboard of resources and costs across AWS, GCP, Azure, and other providers. It helps engineering and FinOps teams identify idle resources, track spending trends, and enforce governance policies.

What Komiser Does

• Scans cloud accounts to inventory resources across multiple providers
• Visualizes cost breakdowns by service, region, and resource type
• Identifies idle or underutilized resources for cost savings
• Provides custom views and filters for resource management
• Stores data locally in SQLite or PostgreSQL for historical tracking

Architecture Overview

Komiser is a single Go binary with an embedded web UI. It uses cloud provider SDKs to fetch resource metadata and pricing data, storing results in a local database (SQLite by default, PostgreSQL optional). The dashboard queries this local store, so no data leaves your infrastructure. Multiple cloud accounts are configured via a YAML config file.

Self-Hosting & Configuration

• Download a single binary or run via Docker (no dependencies required)
• Configure cloud accounts in config.toml with provider credentials
• Uses existing AWS profiles, GCP service accounts, or Azure AD credentials
• Switch from SQLite to PostgreSQL for team-scale deployments
• Schedule periodic scans via cron or run continuous with built-in polling

Key Features

• Multi-cloud support covering AWS, GCP, Azure, OCI, DigitalOcean, and more
• Single binary deployment with no external dependencies
• Local data storage ensures cloud inventory never leaves your infrastructure
• Custom filters and saved views for organizing resources by team or project
• Cost anomaly detection highlighting unexpected spending changes

Comparison with Similar Tools

• Infracost — Estimates cost of Terraform changes before apply; Komiser audits live resources
• Cloud Custodian — Policy-as-code enforcement; Komiser focuses on visibility and cost dashboards
• Vantage — Commercial cloud cost platform; Komiser is open-source and self-hosted
• OpenCost — Kubernetes-specific cost allocation; Komiser covers all cloud resources

FAQ

Q: Does Komiser require cloud admin permissions? A: It needs read-only access to resource and billing APIs. No write permissions are required.

Q: Can Komiser track costs over time? A: Yes. It stores scan results in a local database, enabling historical cost trend analysis.

Q: Is there a managed/SaaS version? A: Tailwarden offers a managed version of Komiser with additional collaboration features.

Q: How often does Komiser refresh resource data? A: Configurable via scan intervals. The default polling period can be adjusted in the config file.

Sources

• https://github.com/mlabouardy/komiser
• https://docs.komiser.io/