EBITDA and revenue are both valuable metrics used to calculate business performance. The primary difference between EBITDA and revenue is that EBITDA is a company's total income minus operating expenses. On the other hand, revenue is a company's total income before deducting any expenses.

Top line revenue and EBITDA are both critical financial metrics, but they measure very different stages of a company's profitability. Top line revenue refers to the "Gross Income" or total amount of money generated by sales before any expenses are taken out; it is called the "top line" because it literally sits at the very top of the income statement. It tells you how much the market demands your product. EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) is a measure of "Operating Profitability." It takes that top-line revenue and subtracts operating expenses like salaries, rent, and raw materials, but "adds back" non-cash items like depreciation and financial costs like interest. While revenue shows you the "size" of the business, EBITDA shows you the "efficiency" and cash-generating potential of the core operations. A company could have massive revenue but a negative EBITDA if its operating costs are too high. Investors often use the EBITDA-to-revenue ratio (margin) to compare companies within the same industry, with a 10% or higher margin generally being considered healthy in many sectors.