Definition

What is cost attribution?

Cost attribution assigns AI spend to the team, project, or cost center that incurred it, turning one vendor invoice into per-owner accountability. Without it, a single Anthropic or OpenAI bill hides who spent what. Spendassay attributes spend at the team level, never individual league tables, using connector metadata and corporate-card data.

Every figure Spendassay publishes about cost attribution carries a proof level saying how much guessing sits behind it, and opens to show the rows it was computed from. The full method is on the methodology page.