Billable Units
Langfuse pricing is based on the number of ingested units per billing period. Units are either traces, observations or scores.
Units = Count of Traces + Count of Observations + Count of Scores
On Langfuse Cloud, use the pricing calculator to estimate your monthly costs. Self-hosted Langfuse (OSS) is free under the MIT license, with no usage-based billing; for self-hosted Enterprise, billable units are one component of the pricing. Unit counts also help you estimate data volume when sizing a self-hosted deployment.
Monitor usage
You can monitor the same unit types at two levels: across your organization to see which projects drive usage, and within a project to inspect its trace, observation, and score counts. Both views are available on Langfuse Cloud and self-hosted deployments.
Start with the organization overview when investigating a usage increase, then open the relevant project's dashboard for more detail. If you already know which project to inspect, go directly to its dashboard.
Compare usage across projects
In Organization Settings, open the page for your deployment. Its Usage breakdown chart shows unit counts across all projects in the organization.
| Deployment | Page | Required organization role |
|---|---|---|
| Langfuse Cloud | Billing | Owner |
| Self-hosted | Usage | Owner or Admin |
- Select a time range. Presets span Past 1 day through Past 1 year, with hourly, daily, weekly, or monthly buckets chosen automatically. All buckets use UTC.
- Choose a grouping. Select By project to identify projects driving a spike, or By type to compare traces, observations, and scores.
- Export the data. Use Download as CSV for offline analysis or allocating usage across teams. Each row represents a time bucket, project, and unit type.
Custom date ranges can cover up to one year.
Inspect usage within a project
Open a project you have access to, go to Dashboards, and select Langfuse Usage Management, one of Langfuse's curated dashboards. This view counts units for that project only.
Select the same date range as the organization chart to inspect the period that caught your attention. To estimate a month of usage for this project, select the last 30 days and add Total Trace Count, Total Observation Count, and Total Score Count (including both numeric and categorical score widgets).
For the example above:
Units = 20,070 Traces + 119,500 Observations + 561 Scores = 140,131 units / month (≈ 1,681,572 units / year)
On Langfuse Cloud, you can also configure spend alerts to receive email notifications when your organization's bill crosses a monetary threshold.
FAQ
How can I track my usage in Langfuse Cloud?
Follow the usage monitoring flow above to start with an organization overview or inspect an individual project.
Do units created by Langfuse features count toward billable units?
Yes. Any trace, observation, or score stored in Langfuse counts as a billable unit, whether it is sent by your application or created by Langfuse features such as LLM-as-a-Judge, Annotation Queues, or experiments.
How can I optimize my Langfuse Cloud usage to reduce cost?
If your application scales and you want to optimize Langfuse Cloud cost, please check out this guide.
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