
Stape.io
Google Tag Manager
PixelFlow.so
Tracklution
Taggrs.io
Elevar
Conversios.io
Addingwell delivers fast and reliable fully-managed tagging servers for your Google Tag Manager server-side.

Triple Whale
Elevar
Littledata
Analyzify
Stape.io
Server-side tracking and identity resolution for Shopify brands.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | addingwell.com | upstackdata.com |
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| Platforms | ||
| Company | 2021 | Startup from the United States · 1 - 9 employees · 2023 |
| Listed in |
In their own words, as submitted to SaaSHub.


Without any coding or DevOps expertise, you can install Google Tag Manager server-side with the best possible infrastructure for your subsequent use cases. Addingwell offers to set up for you the best possible infrastructure on the market for the use you will have of GTM Server-Side. Many...
Upstack Data is the #1 Most Reliable Ad Tracking Software For Shopify. We help ecommerce brands identify, enrich, and activate first-party data to lower acquisition costs and drive advertising results. Our server-side tracking captures 99.9% of conversion events and delivers a 90%+ event match...
What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Addingwell and Upstack Data.
Upstack Data's answer:
Upstack Data works with DTC Shopify brands including Perfect White Tee, Maelove, Labucq, Printfresh, Champo, Paire, Montreal Weights, and Aquarium Co-op.
Upstack Data's answer:
Upstack Data was founded by Michael Alt to solve a problem hurting Shopify brands: browser-based tracking quietly loses data to iOS restrictions, ad blockers, and cookie expiration, leaving ad platforms optimizing on incomplete information. By capturing conversion events server-side and resolving visitor identity across devices, Upstack Data gives Meta, Google, and Klaviyo the data they need to optimize for buyers, not browsers — helping brands drive 7- and 8-figure growth and recover millions in revenue.
Upstack Data's answer:
Upstack Data is built on server-side event capture through the Conversion API (CAPI), a cross-device identity resolution engine (Upstack ID), a multi-touch attribution model, and native Klaviyo integration for abandonment recovery.
Upstack Data's answer:
DTC Shopify brands running Meta, Google, and TikTok ads — typically those spending $50K–$5M per month on advertising who want to reduce the data loss caused by iOS restrictions, ad blockers, and cookie expiration.
Upstack Data's answer:
Most tools track anonymous actions. Upstack Data resolves the actual identity of visitors across browsers, devices, and sessions, then sends that enriched data to Meta, Google, and Klaviyo in a form they can act on — driving lower CAC, better attribution, and more recovered revenue. The result is a 90%+ Meta CAPI match rate, versus the ~35% typical of standard implementations.
Upstack Data's answer:
Upstack Data replaces a multi-tool stack — like Elevar plus Triple Whale — with a single server-side tracking and identity resolution platform, at a fraction of the cost. Setup takes about 30 minutes with no developer required, and every plan comes with a 10-day free trial and a 60-day money-back guarantee.
Share your experience with using Addingwell and Upstack Data. For example, how are they different and which one is better?
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