AI-Powered Incrementality Testing

Meet Stella: The smartest, most affordable incrementality testing solution for brands and agencies.

Reveal the true drivers of your growth

Incrementality testing isolates the real impact of your marketing by answering, “What would happen if this campaign didn’t exist?” By running controlled experiments, you’ll uncover the true incremental revenue each channel delivers—so you can focus on what works and stop guessing.

The clarity you've been searching for

Common KPIs like ROAS often mislead, masking what truly drives growth. Incrementality testing shifts the focus to iROAS (Incremental ROAS), revealing how your ads directly contribute to your bottom-line. Get clear, actionable insights to spend smarter and make every dollar count.

Turn insights into action

Whether you’re a junior marketer or a Head of Data with a PhD, Stella’s AI makes advanced analysis accessible to all. Complex results are simplified into insights you can act on right away. Stella doesn’t just tell you what’s working; it shows you how to integrate these insights into your existing strategy.

Test Smarter, Spend Less

Getting answers shouldn’t cost a fortune. That’s why Stella’s recommended investment minimums are typically 3x smaller than other tools. You’ll run more tests in less time, gaining insights faster while keeping costs low. And with every test designed to maintain statistical significance, you can trust the results to guide your strategy.

Your Partner in Precision Marketing Measurement

Select the Perfect Holdout Regions
Stella helps you pinpoint the most effective holdout regions, maximizing statistical significance with minimal ad spend.
Execute Your Study Without Costly Mistakes
Guided every step of the way, Stella ensures your incrementality study is set up accurately for reliable results.
Analyze Results with Expert Guidance
Stella’s AI data scientist interprets your results, turning insights into clear, actionable recommendations for your marketing strategy.

Affordable,
Powerful Incrementality Testing

Why pay more for less? At just $2K a month, you can run unlimited incrementality studies. No long-term contracts. No hidden fees. No surprise price hikes. Month-to-month flexibility, because that’s what you deserve.

Stella AI Incrementality

$2,000/month

$2,500/month

Hands-On-Service
+ $500/month
Features
  • Geo-lift studies
  • Inverse-Holdout studies
  • Incremental impact analysis
  • Scale testing
  • Causal impact analysis
  • AI Data Scientist guidance
  • Auto-Generated Report Export
  • Month to Month Terms
Features
  • Geo-lift studies
  • Inverse-Holdout studies
  • Incremental impact analysis
  • Scale testing
  • Causal impact analysis
  • AI Data Scientist guidance
  • Auto-Generated Report Export
  • Month to Month Terms
Get startedGet started

Find the true impact of every single dollar with Stella

Frequently asked questions

What is Stella?

Stella is your AI-powered incrementality expert, designed to help mid-market ecommerce brands measure the true impact of their marketing. By uncovering incremental revenue across channels and providing actionable insights, Stella simplifies advanced analysis so you can optimize ad spend with confidence.

How can I get started with Stella?

Getting started is easy. Explore our virtual demo to see Stella in action or book a live demo with our team for a personalized walkthrough and answers to your questions.

How does Stella ensure the privacy and security of data?

Stella prioritizes your data’s safety. We use top-tier encryption, comply with global privacy laws like GDPR, and regularly audit security measures. Stella never ingests PII, ensuring your data stays protected and anonymized.

Who should use Stella?

Stella is built for marketing leaders at mid-market ecommerce brands with $10M–$100M in annual revenue or at least $1M in ad spend annually. If you want clear, actionable insights into what drives real growth, Stella is for you.

What does Stella cost?

Stella’s incrementality tool is just $2,000/month for unlimited studies using uploaded data, making it one of the most affordable solutions available. Pricing for direct data ingestion depends on your monthly ad spend. Stella ensures transparency and flexibility so you only pay for what you need.

Is there customer support available for Stella users?

Yes! Stella is intuitive to use, but our team is here for you whenever help is needed. From a smooth onboarding experience to hands-on support, we’re committed to responding within 24–48 hours to keep your testing on track.