LeftSize vs Komiser
Komiser builds an inventory of your cloud resources across AWS, Azure, Google Cloud and other providers and shows cost, idle and untagged resources in a dashboard you host yourself. LeftSize runs a fixed rule set against AWS, Azure and Cloudflare every day and opens GitHub or Jira issues for what it finds, with savings estimates, fix steps and commands to snooze or ignore them.
Last checked against Komiser's documentation in October 2026.
| LeftSize | Komiser | |
|---|---|---|
| What it does | Runs 217 rules (98 AWS, 93 Azure, 26 Cloudflare) for waste, retirements, security and governance | Builds an inventory of cloud resources with cost, usage and tags, and surfaces idle and untagged resources |
| Where findings go | GitHub or Jira issues per rule and scope, with resources, estimated monthly savings and fix steps | A web dashboard |
| Setup and hosting | A GitHub Action in your own workflow; nothing to host | A binary or container you run and keep running yourself |
| Clouds | AWS, Azure and Cloudflare | AWS, Azure, Google Cloud, Civo, DigitalOcean, OCI and more |
| Retirements and end of support | 75 rules for retiring services, VM sizes and end-of-support versions | Not a focus of the project |
| Licence and maintenance | The scanning action is MIT-licensed; rules are maintained by LeftSize | Source available under the Elastic License 2.0; latest release v3.1.22 (December 2024), commits through 2026 |
| Pricing | Free: 81 cost rules, 3 repositories. Team $79/month or Business $249/month, all 217 rules | Free to self-host |
Where Komiser is the better choice
- A browsable inventory of all your resources, not only the ones a rule flags.
- Supports more clouds, including Google Cloud and smaller providers.
- Free, and everything stays on infrastructure you run.
What LeftSize adds
- Nothing to host or update: it runs in GitHub Actions on a daily schedule.
- Findings become GitHub or Jira issues that are assigned, discussed, snoozed and closed like any other work, so they don’t wait for someone to open a dashboard.
- Tracks service retirements and end-of-support deadlines, with the dates and the resources affected.
- Estimated monthly savings per resource from public list prices.
Using them together
Use Komiser if you want a self-hosted inventory to explore your cloud, and LeftSize to have the waste and retirements it would show you arrive as issues every day.