Know what’s
causing growth.
Know what to do next.

Measuring what your marketing actually caused: the sales that would not have happened without it, not the sales it was credited with. Holdout experiments are the most direct test. Stella combines them with attribution, surveys and media mix modeling so every channel gets a causal read, not just the ones you tested.

Growth leaders at consumer brands spending $300K or more a month on paid media across several channels, who have to defend budget decisions to a CFO, board or PE sponsor. Ecommerce, multi-location healthcare, home services, subscription and auto brands all fit. Smaller teams can start free.

Which channels are creating additional sales, which ones are taking credit for sales you would have made anyway, and how much room each one has left before returns flatten. Then what to do about each.

Attribution is one signal. Stella also reads what your customers say drove the purchase, what holdout experiments prove, and what a media mix model expects as spend moves, then weighs each signal by the strength of the evidence behind it.

Yes. In a managed engagement our team designs and runs the holdouts, builds and calibrates the model, and tells you what to cut, move and scale. Within 90 days we identify incremental revenue opportunity worth at least 10x what you have paid us for those 90 days, proved by evidence you can check. If we have not, you do not pay for them.

No. Stella guides you step by step, and you can chat with it in plain language.

Free to start, then $750, $3,000 and $6,000 a month depending on how much of the loop you want running. Managed engagements are scoped and priced to what you need.