Tony Sternberg

Tony Sternberg Profile Photo

Co-Founder & CEO

The first 12 years of my professional life were spent in the SaaS world at CATS, a bootstrapped startup in the HR Tech space, where I joined as one of the first employees. There, I played key customer-facing, product and operational roles, helping grow revenues from the low thousands to $6M while acting as President prior to the company being sold.

As our company began to scale and mature, we realized how little we know about why our customers would churn. We knew there was room to learn from those cancellations and even give them opportunities to stay.

So, my co-worker (turned co-founder) and I decided to build on this solution ourselves. We integrate tightly with billing platforms (like Stripe) to act as an automated retention department that 1) provides an offboarding experience tailored to different segments of customers, 2) collects feedback from them, 3) presents targeted offers and incentives for them to stay at the point of cancellation, and 4) combines that data to show meaningful churn metrics. We call it ProsperStack.

Here's what our clients are seeing:

+ Reduced churn (up to 40%)
+ Increased LTV
+ Actionable insights that can be used by product, marketing and others

Interested in retaining more customers, immediately? Request a demo at:

https://prosperstack.com/

Dec. 2, 2025

POV: Your "Beautiful" Shopify Acquisition Strategy Leads to a Leaky Bucket. 😨

🚨 DON'T MISS OUR EXCLUSIVE WEBINAR WITH TONY 🚨. Join us December 16, 1:00pm ET: https://bit.ly/stop-the-leak-dec-16 Your Shopify brand is losing subscribers that you could easily save and your cancellation page needs more help than your ads! In this Shopify podcast, I dive into cancellation flow…