There are many firms that sell salary data for companies to create their own compensation bands. They all suck. Data is collected via survey so it is stale and skewed to the participants. The data is often sparse and the leveling is not well normalized. And that’s just for salary data, which is the easier problem. Equity compensation is harder and the incumbent firms there are even worse at it. Think of a modern and real-time version of Radford, for cash and equity.