Liz
Great tool great service
Michael and his team are knowledgeable, responsive, and very helpful. Reliable is definitely the word I'd use to describe the service and tool, and it only seems to be getting better.

Upstack Data is the #1 Most Reliable Ad Tracking Software For Shopify — a server-side tracking and identity resolution platform for brands running Meta, Google, and TikTok ads. It captures visitor and conversion events server-side rather than in the browser, reducing the data loss caused by ad blockers, iOS privacy restrictions, and cookie expiration. By resolving visitor identity across devices and sessions, Upstack enriches the data sent to ad platforms and Klaviyo — improving attribution accuracy, lowering customer acquisition costs, and recovering revenue from abandonment flows. Core capabilities: server-side Conversion API, cross-device identity resolution, multi-touch attribution, and Klaviyo abandonment recovery. Built for DTC Shopify brands. Plans from $249/mo · 21-day free trial · 60-day money-back guarantee.
Upstack Data (upstackdata.com) has 5 customer reviews on Five Star Index, with an average rating of 5.0 out of 5.
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Liz
Michael and his team are knowledgeable, responsive, and very helpful. Reliable is definitely the word I'd use to describe the service and tool, and it only seems to be getting better.
James J.
Our domain was miscategorized with H&W last year and since then we've been using Upstack as a solution. Great service and product, highly recommend
Malcolm
Michael and the whole Upstack Data team are fantastic to work with. They started running our tracking stack about 3 years ago (when they were starting out) and have been a joy to work with. Accurate data, quick responses and a proactive - friendly approach. 5 stars.
Peter G.
We tried every attribution software out there. Upstack is the only one that can crack the ecommerce code, especially for companies that fall under Health & Wellness in Meta. The team is hyper-responsive on Slack. Couldn't ask for more.
Dave R.
Upstack has been a great partner. They get back to me when I'm panicked about ad performance and dig into the pixel setup. They help me diagnose, guide me on future implementations, and are, altogether, a very reliable partner for a service that absolutely cannot slip. The dashboard is easy to use, but ultimately, the key thing I need is a reliable partner where I know my data is solid and they've been that for me.