We Had 6 Features. 2 Were Eating Our Budget

Short summary

A B2B SaaS company discovered hidden AI costs by instrumenting LLM calls with feature, user, and service tags. Two features (Compliance Checker and Audit Trail Narrator) consumed 71% of budget despite appearing to work correctly, costing $2,592/month in unnecessary expenses. The case demonstrates how standard monitoring tools miss AI cost attribution, making it difficult to identify unprofitable features or user segments.

• •Instrumented every LLM call with feature, user, and service tags to gain cost visibility
• •Discovered Compliance Checker (45%) and Audit Trail Narrator (26%) consumed 71% of $4,200/month budget
• •Fixed three silent cost bugs worth $2,592/month combined with zero user-facing impact

Generated with AI, which can make mistakes.