Free & open source
Know every dollar
in your cloud, for free.
CostGoblin syncs your AWS billing data locally and queries it with DuckDB. No servers. No SaaS fees. Your data never leaves your machine.
CostGoblin syncs your AWS billing data locally and queries it with DuckDB. No servers. No SaaS fees. Your data never leaves your machine.
Cloud cost visibility shouldn't be a finance-only perk. CostGoblin is a desktop app for anyone curious about their AWS bill — and especially the engineers, architects, and small teams who can act on what they see.
Delete the orphaned RDS instance. Right-size the cluster. Kill the forgotten NAT gateway.
No sales call. No cross-account IAM role. No annual contract.
Seven views, one local DuckDB. From raw line items to AI-driven Q&A — every dollar accounted for, every query in milliseconds.
Cost trends, top services, biggest movers, and your most expensive dimensions — all on the landing screen. Filter by team, environment, region, or any custom tag and the whole view recomputes in milliseconds.
Most cost tools force you to fix tagging upstream and wait for the next data export. CostGoblin does it at query time. Rename, alias, group, fall back — any tag, any rule. prod, Prod, production become one. Custom dimensions from any tag key. Every change applies instantly, across every view, with zero re-processing.
Compose custom views from a library of widgets — summary cards, stacked bars, pie charts, tables. Drag to reorder, resize, and group. Export and share as YAML.
Period-over-period bubble chart shows cost increases and savings at a glance. Bubble size maps to current spend. Filter by minimum dollar or percent change, drill into any entity.
See which resources are missing allocation tags, grouped by actionable vs. untaggable. Filter by dimension, minimum cost, or fallback owner. Copy findings to Slack or Jira in one click.
AWS optimization recommendations sorted by monthly savings. See effort level, expand for full resource details, and filter by action type — rightsizing, reserved instances, deletions.
Filter, sort, and explore the raw CUR dataset. See daily totals at a glance, slice by any dimension, and click any cell to drill deeper. Thousands of line items queried in milliseconds.
Before setting up any exports, make sure the tags you want to slice costs by are activated in the AWS Billing Console → Cost Allocation Tags.
Activate any user-defined tag you plan to use as a dimension in CostGoblin (e.g. team, environment, service). Tags that aren't activated here won't appear in the CUR exports, no matter how they're configured.
Pick a dedicated bucket (or prefix) for all CostGoblin data. We recommend this structure so each export lands in its own namespace:
In the AWS Billing Console → Data Exports, create two exports. Select Cost and usage report (CUR) as the data table and configure each one as follows:
Under Column selection, enable these and disable the rest to keep file sizes small:
In the AWS Billing Console → Cost Optimization Hub → Preferences, enable the S3 data export:
Open CostGoblin, go to Sync and point each data source to its S3 prefix. Once the first sync completes, head to Dimensions to map your tags to cost allocation dimensions. This is where CostGoblin shines — for each dimension you can:
Automatic alerts when spending deviates from historical patterns. Catch surprises before the bill lands.
Set spending targets per team, product, or environment. Track burn rate against budget in real time.
Share dashboards and cost reports with your team. Collaborative triage for cost spikes.
GCP and Azure billing support alongside AWS. One interface for all your cloud spend.
New features, releases, and cloud cost insights. Low volume, high signal.