Addingwell is a fully-managed GTM server-side hosting + tooling (monitoring, adblocker bypass, Safari resilience) to improve data quality, performance and governance.

Blotout restores your marketing signals in the post-cookie world. Your returning customers are showing up as anonymous and Blotout aims to identify them.
| Feature | Addingwell | Blotout | Littledata |
|---|---|---|---|
| Works with platforms other than Shopify | ✔️ | ✔️ | |
| Identity resolution to boost audiences | ✔️ | ✔️ | |
| Direct from Shopify's servers | ✔️ | ✔️ | |
| Customer data to marketing platforms | ✔️ | ✔️ | |
| Founder owned and led | ✔️ | ✔️ | |
| Via server-side Google Tag Manager | ✔️ | ||
| 30 day free trial | ✔️ | ||
| Fully automatic, no code setup | ✔️ | ||
| Natively supports Shopify Markets | ✔️ | ||
| Automatic tracking of checkout steps | ✔️ |
Addingwell focuses on server-side GTM hosting with monitoring and ad-blocker bypass — but it still relies on browser-initiated tags, limiting its ability to capture server-side Shopify events or enrich data with customer context that the browser never sees.
Blotout goes further with identity resolution and direct Shopify server-side tracking, making it a stronger signal-recovery tool. However, it lacks a free trial and requires more hands-on setup.
Littledata wins because it combines the best of both worlds — direct server-side tracking from Shopify's servers (capturing what browsers miss), plus identity resolution to recover anonymous returning customers. Unlike Addingwell, it doesn't depend on browser tags. Unlike Blotout, it offers a 30-day free trial, fully automatic no-code setup, native Shopify Markets support, and automatic checkout step tracking — making it faster to deploy and more complete out of the box for a Shopify Plus brand.
| Addingwell | Blotout | Littledata | |
|---|---|---|---|
| Example product review | Setup took just a few seconds, and it works right away. All my pixels from GTM are now server-side and perfectly connected. So much money saved on ads. | "After using Blotout for a couple months, we decided to drop them... Blotout was taking credit for a lot of Klaviyo pixel events that would’ve happened anyway... Event match quality in Facebook was marginally better, but I don’t think it warrants the cost or complexity." | "We were having difficulties with accurate and consistent revenue attribution...With Littledata implemented, we now get consistent and accurate revenue attribution." |
| Example support review | The support was very fast to answer our questions and super helpful. Just be careful to check that the events don't trigger twice. | "It took weeks to get a reply regarding a refund... it seems they grew too fast to keep up with customer service." | "Customer support is absolutely amazing... you can never go wrong when an app does what it says and tacks on great service!" |
| Link | Read more reviews |
| Store size | Addingwell | Blotout | Littledata |
|---|---|---|---|
| 50 orders / month | $90 | $79 | $39 |
| 500 orders / month | $90 | $400 | $199 |
| 5,000 orders / month | $130 | $1980 | $449 |
| 20,000 orders / month | $400 | $5000 | $1390 |
For 50 orders, Addingwell is 14% more expensive than Blotout and 131% more than Littledata. At 500 orders, Addingwell and Blotout are equal, while Littledata is 66% more expensive. For 5000 orders, Addingwell is 93% cheaper than Blotout but 63% more than Littledata. At 20000 orders, Addingwell is 92% cheaper than Blotout and 50% more than Littledata. Overall, Addingwell is generally more affordable at higher volumes, while Blotout significantly increases in cost.
| Destination | Addingwell | Blotout | Littledata |
|---|---|---|---|
| Google Analytics | ✔️ | ✔️ | ✔️ |
| Meta Ads | ✔️ | ✔️ | ✔️ |
| Google Ads | ✔️ | ✔️ | ✔️ |
| TikTok | ✔️ | ✔️ | |
| ✔️ | ✔️ | ||
| Microsoft Ads | ✔️ | ✔️ | |
| Klaviyo | ✔️ | ✔️ | |
| Attentive | ✔️ | ✔️ | |
| Snap | ✔️ | ||
| Segment | ✔️ |
Addingwell focuses on paid advertising channels (Meta, Google, TikTok, Pinterest, Snap, Microsoft), making it strong for ad signal recovery across a broad ad network mix.
Blotout has a narrower destination set but notably includes Klaviyo and Attentive, prioritizing email/SMS retention channels alongside paid ads.
Littledata offers the most comprehensive coverage, combining paid ad destinations with Klaviyo, Attentive, and Segment — making it the strongest choice if you need both retention channel tracking and a data warehouse/CDP pipeline via Segment, in addition to ad platform signal enrichment.
If your stack is ad-heavy, Addingwell wins on breadth. If retention tools matter, Littledata covers the most ground.
| Feature | Addingwell | Blotout | Littledata |
|---|---|---|---|
| Product list views & clicks | |||
| Tracks products list as you scroll | ✔️ | ||
| Tracks clicks on product list | ✔️ | ||
| Consistent product identifier in GA4 | ✔️ | ||
| Add to Cart | |||
| Tracked client-side | ✔️ | ✔️ | |
| Tracked server-side | ✔️ | ||
| Enriched product info | ✔️ | ||
| Tracks remove from cart | ✔️ | ||
| Checkout steps | |||
| Tracked via checkout page | ✔️ | ||
| Tracked direct from Shopify's servers | ✔️ | ||
| Compatible with checkout extensibility | ✔️ | ||
| Compatible with accelerated checkouts | ✔️ | ||
| Tracks all checkout steps | ✔️ | ||
| Purchase | |||
| Direct from Shopify for 100% accuracy | ✔️ | ✔️ | |
| Tracked via thank you page | ✔️ | ||
| Includes post-purchase upsells | ✔️ | ||
| Includes recurring orders | ✔️ | ||
| Filter orders by sales channel | ✔️ | ||
| Includes refunds | ✔️ | ||
| User-provided data for improved attribution | ✔️ | ||
| Custom mapping to a source / medium | ✔️ | ||
| Feature | Addingwell | Blotout | Littledata |
|---|---|---|---|
| Google Ads Conversions | |||
| Unreliable tracking via thank you page | ✔️ | ✔️ | |
| Tracked direct from Shopify's servers | ✔️ | ||
| Real-time tracking of Enhanced Conversions | ✔️ | ||
| Fully automatic setup | ✔️ | ||
| New vs Returning customer conversions | ✔️ | ||
| Feature | Addingwell | Blotout | Littledata |
|---|---|---|---|
| Key benefits | |||
| 100% accurate revenue in Meta | ✔️ | ✔️ | |
| Boost to Event Match Quality Score | ✔️ | ✔️ | |
| Pre-purchase audiences based on first-party data | ✔️ | ||
| Target subscriptions vs one-time purchases | ✔️ | ||
| Fully automatic setup | ✔️ | ||
| AddToCart | |||
| Via Conversions API | ✔️ | ||
| InitiateCheckout | |||
| Via Conversions API | ✔️ | ||
| Includes all checkout steps | ✔️ | ||
| Purchase | |||
| Via Conversions API | ✔️ | ✔️ | ✔️ |
| Includes post-purchase upsells | ✔️ | ||
| Includes recurring orders | ✔️ | ||
| Filters to exclude orders from some channels | ✔️ | ||
| New vs Returning customer conversions | ✔️ | ||
