Is that still true today?
When marketing changes, Stella automatically measures whether the outcome changed with it.
From Professional ($3,000/mo).
Illustrative.
Trusted by growth teams who left enterprise measurement vendors
The business keeps moving.
Creative changes, spend scales, campaigns launch and pause; last quarter’s answer quietly goes stale.
When marketing moves, Stella measures.
Eligible changes get an automated causal read; formal holdouts and MMM refreshes periodically recalibrate the daily view.
Illustrative.
Always-On doesn’t replace experiments.
It fills the gaps between them. The daily read is only as accurate as the tests that calibrate it, which is why the automated signal carries the least weight on its own.
Recent studies are weighted higher, so accuracy compounds as you keep testing.
Take the answer anywhere.
Chat in Stella, connect your own Claude via MCP, or push it all to your warehouse.
With Stella, you know.
Whether that budget change moved sales.
An automated causal read on each eligible change.
Which campaigns create lift.
And which never have.
Which campaigns are past saturation.
And which have room before it.
When incrementality drifts.
Creative fatigue and causal decay, caught as they happen.
Whether the number is stale.
And when the next test should recalibrate it.
Today’s read, not last quarter’s.
Without waiting 20 days for a formal result.
Ask Stella what changed.
How incremental a channel is right now, and where budget should move this week.
Hear it from the brands we run measurement for.
Always-On incrementality questions, answered.
Is Always-On a substitute for running holdouts?
No, and it is not meant to be. Always-On is the daily view; it is only as accurate as the evidence that calibrates it. Formal holdouts and MMM refreshes periodically recalibrate the daily read, and the automated signal inherits their rigor between tests. Teams that keep testing get the sharpest daily numbers.
How does a spend change qualify for a study?
When a campaign meaningfully changes spend, Stella runs a 15-day before-and-after causal analysis, controlling for your other spend and confounders. The change only qualifies if the window is clean, with no other change within a few days on either side, so each read is not contaminated by something else moving at the same time.
How fast is it compared to a holdout?
A geo holdout takes 20 days or more before you get a read. Always-On keeps a current view per campaign and channel continuously, so you move from insight to action in days. Run holdouts for the rigorous number, and let Always-On keep it fresh in between.
Which outcomes can I measure?
Target the response to Shopify revenue, Amazon revenue, or total revenue, so you can see how incremental Meta is on Shopify versus Amazon versus your blended business, not just one platform.
What plan includes Always-On?
Always-On Incrementality is included from Professional ($3,000/mo) and up. Incrementality testing and media mix modeling are in every plan, free and up.
See your daily incrementality.
A founder will show you Always-On running on your channels, and how your holdouts and MMMs keep it honest.