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Tag Explorer is available on Professional, Business, and Enterprise plans.

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Overview

The Tag Explorer lets you break down cloud spend by any resource tag key and see which tag values are driving cost. It works across all connected providers — you can see how much your team=payments resources cost across AWS, Azure, and GCP combined, without exporting CSVs or writing queries.

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Selecting an Account

Use the account switcher in the top navigation to scope the Tag Explorer to a specific connected account. Tag keys and values are fetched for the selected account and provider.

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Browsing Tag Keys

The left panel lists all tag keys detected on the selected account. Click a key to load the cost breakdown for that key — for example, selecting env shows total spend for env=production, env=staging, env=dev, and any untagged resources.

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Cost Breakdown

For each tag key, Cost Optix shows:
  • Tag value — the specific value (e.g. production)
  • Total cost — spend attributed to resources with that tag value in the selected period
  • Percentage — share of total spend for that key
  • Untagged cost — spend from resources that have no value for this tag key

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How Tag Data Is Fetched

Tag data loads in two phases to keep the interface fast:
  1. Phase 1 — on page load: Tag keys are synced from the provider’s API. For Azure this uses the Consumption Tags API; for AWS and GCP, keys are read from the local tag aggregates table.
  2. Phase 2 — on demand: When you select a tag key, Cost Optix fetches the cost breakdown for that specific key. For Azure this calls the Usage Details API scoped to the key. For GCP it runs a BigQuery UNNEST query over the billing export dataset.
This means the initial page load is always fast, and detailed cost data is only fetched when you need it.

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Date Range

Use the date picker to select a time window. Presets include last 7 days, last 30 days, this month, and last month. Custom date ranges are also supported.

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Drilling into Resources

Click a tag value to see the individual resources tagged with that value — resource name, resource ID, resource group (Azure), type, and location. Filter and search within the resource list, and paginate through large result sets.

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Exporting

Both the cost breakdown and the resource list can be exported to CSV using the Export button in each view.

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Untagged Resources

Cost Optix surfaces untagged spend alongside tagged spend. Resources with no value for the selected tag key appear in the Untagged row. This helps identify resources missing tags that are hard to attribute to a team or project.

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Tag-Scoped Budgets

Tag keys and values from the Tag Explorer can be used as filters when creating a budget, so you can track spend for a specific tag combination against a budget limit. See Budgets for details.