Open Source Go FinOps Tools

OpenMeter is an open-source metering and billing platform designed to collect, aggregate, and analyze usage events from APIs, cloud infrastructure, and software services in real time, enabling flexible usage-based billing for SaaS, AI, and DevOps offerings. It supports high-scale event ingestion and deduplication to accurately record how customers consume billable resources such as API calls, compute time, or storage, and then correlates that usage with payment systems and billing plans to automate invoicing and revenue recognition. The system includes metering, storage, cataloging of products and pricing rules, and tools to enforce limits or quotas, supporting both self-service customer portals and internal dashboards. OpenMeter integrates with payment processors, CRMs, and analytics systems, letting teams launch complex pricing models or subscription tiers without heavy custom engineering work.

Finala is an open-source cloud resource scanner that detects and reports on unused or wasteful cloud assets, helping organizations reduce unnecessary expenses and optimize their infrastructure footprint by continuously analyzing deployed resources against user-defined rules. It scans cloud environments, identifies idle or underutilized machines, unattached storage, or resources not aligned with utilization policies, and presents actionable insights that help teams reclaim budget and compliance. Users define scanning criteria and thresholds in configuration files to tailor detection to their operational needs, making Finala flexible across different organizational scales and cloud setups. The tool then outputs reports and notifications about inefficient resources, enabling cost-conscious engineering teams to make informed decisions about shutting down or rightsizing assets. Because it’s self-hosted and rule-based, Finala can be integrated into CI/CD and monitoring workflows.

Infracost scans for Terraform code changes and checks over 3 million prices to create a simple, understandable cost estimate before any resources are launched. Infracost integrates into CI/CD so everyone knows the cost impact of changes without leaving the workflow. Infracost integrates with Open Policy Agent, Sentinel, and Conftest, enabling DevOps teams to set best practices as policies. Infracost automatically creates detailed, shareable cost estimates which can be sent to clients and managers with different scenarios. Infracost supports over 230 Terraform resources across AWS, Azure and Google. Other IaC tools, such as Pulumi, AWS CloudFormation/CDK and Azure ARM/Bicep are on our roadmap. Infracost can also estimate usage-based resources such as AWS S3 or Lambda! Infracost has many CI/CD integrations so you can easily post cost estimates in pull requests. This provides your team with a safety net as people can discuss costs as part of the workflow.

Stay under budget by uncovering hidden costs, monitoring increases in spending, and making impactful changes based on customer recommendations. Komiser CE is a free and Open Source project with the goal to create an open cloud cost optimization project with the support of all major public cloud providers. In the last months, we’ve more than doubled our OSS downloads and expanded our community footprint. This is possible because the tool works solves real problems, and is embraced by end-users. Control your usage and create visibility across all used services to achieve maximum cost-effectiveness. Govern a secure and compliant environment by detecting potential vulnerabilities that could put your cloud environment at risk. Ask your manager or marketing team if your company would be interested in supporting our project.

Crane is a FinOps Platform for Cloud Resource Analytics and Economics in Kubernetes clusters. The goal is not only to help users to manage cloud cost easily but also to ensure the quality of applications.

OpenCost is a vendor-neutral open-source project for measuring and allocating cloud infrastructure and container costs in real-time. Built by Kubernetes experts and supported by Kubernetes practitioners, OpenCost shines a light into the black box of Kubernetes spending. Flexible, customizable cost allocation and cloud resource monitoring for accurate showback, chargeback, and ongoing reporting. Dynamic asset pricing, through integrations with AWS, Azure, and GCP billing APIs as well as support for on-prem Kubernetes clusters using custom pricing. Monitor costs outside the Kubernetes cluster from the cloud provider, resources like object storage, databases, and other managed services.

Selefra is an open-source policy-as-code and infrastructure analysis tool that helps engineering and security teams gain visibility into complex multi-cloud and SaaS environments by treating infrastructure data as queryable information. The core idea behind Selefra is “select * from infrastructure,” meaning you can write flexible SQL-style queries against cloud configuration and inventory data assembled from dozens of services such as AWS, Azure, GCP, Kubernetes, GitHub, Slack, and more, bringing auditing, security, compliance, cost optimization, and architecture insights into one place. It unifies data across provider APIs into a structured model, making it simple to detect misconfigurations, enforce governance policies, and build custom analytics workflows that align with organizational standards. Users can manage policies as code, version them alongside application code, and automate analysis and enforcement through scheduled tasks, CI/CD, or policy-as-code tooling.