TriStem is a Texas-based utility bill auditing firm, established in 1979. Auditing utility bills is our core business; it’s what we do. We audit bills for electricity, street lights, natural gas, water, telecom, and franchise fees. Every client is unique and we tailor your audit to fit your needs. Our auditors are trained look for unique opportunities for savings and refunds on your utility bills. Because of our extensive experience, we know what to look for, how to interpret what we find, and what questions to ask to give our clients the best opportunity to recover overcharges and reduce their utility expenses.