Self-hosted AI spend attribution (github.com)

Costura, a new self-hosted tool currently in beta, enables teams to track and reconcile AI service expenditures across multiple providers—such as OpenAI and Anthropic—without sharing any data with its maintainers. Using read-only billing data, Costura compiles a daily ledger that attributes costs to specific API keys, workspaces, or individuals, and checks to ensure accuracy against each provider's reported totals. The system operates entirely on local infrastructure via Docker Compose, enhancing data privacy and control over sensitive financial information. This tool is particularly significant for organizations managing diverse AI resources, as it facilitates detailed insights into spending patterns, anomalies, and budgets per person or team. Key features include monthly reconciliation with provider reports, customizable budget tracking, and the ability to analyze spending with filters and exports. Costura operates with stringent security measures, encrypting provider keys and storing session hashes, ensuring that organizations can monitor their AI expenditures while maintaining strict data integrity and privacy.