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

Retention.com's identity resolution software helps Shopify merchants recover lost shoppers and increase Klaviyo flow revenue.
| Feature | Addingwell | Retention.com | Littledata |
|---|---|---|---|
| Direct from Shopify's servers | ✔️ | ✔️ | |
| Works with platforms other than Shopify | ✔️ | ✔️ | |
| Identity resolution to boost audiences | ✔️ | ✔️ | |
| Customer data to marketing platforms | ✔️ | ✔️ | |
| Via server-side Google Tag Manager | ✔️ | ||
| 30 day free trial | ✔️ | ||
| Founder owned and led | ✔️ | ||
| Fully automatic, no code setup | ✔️ | ||
| Natively supports Shopify Markets | ✔️ | ||
| Automatic tracking of checkout steps | ✔️ |
Addingwell focuses on server-side Google Tag Manager hosting and data quality improvements, enhancing performance and governance directly from Shopify's servers. Retention.com specializes in identity resolution to recover lost shoppers and boost revenue through marketing platforms. Littledata stands out with its 30-day free trial, founder-led approach, and fully automatic, no-code setup, offering identity resolution and server-side tracking while automatically tracking checkout steps. This combination provides a more user-friendly experience and comprehensive tracking capabilities compared to both Addingwell and Retention.com.
| Addingwell | Retention.com | 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. | "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. | "Unfortunately, the team... very high employee turnover; it can be really frustrating to have to re-explain things to new reps." | "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 | Retention.com | Littledata |
|---|---|---|---|
| 50 orders / month | $90 | $500 | $39 |
| 500 orders / month | $90 | $500 | $199 |
| 5,000 orders / month | $130 | $2000 | $449 |
| 20,000 orders / month | $400 | $5000 | $1390 |
For an online store with 50 orders, Addingwell is 82% cheaper than Retention.com and 56% more expensive than Littledata. At 500 orders, Addingwell and Retention.com are equal in price, while Littledata is 65% more expensive than Addingwell. With 5000 orders, Addingwell is 93% cheaper than Retention.com and 63% cheaper than Littledata. At 20000 orders, Addingwell is 92% cheaper than Retention.com and 50% cheaper than Littledata. Overall, Addingwell consistently offers the lowest pricing across all order volumes.
| Destination | Addingwell | Retention.com | Littledata |
|---|---|---|---|
| Google Analytics | ✔️ | ✔️ | |
| Meta Ads | ✔️ | ✔️ | |
| TikTok | ✔️ | ✔️ | |
| Google Ads | ✔️ | ✔️ | |
| ✔️ | ✔️ | ||
| Klaviyo | ✔️ | ✔️ | |
| Snap | ✔️ | ||
| Segment | ✔️ | ||
| Attentive | ✔️ |
Addingwell focuses on integrating with major advertising platforms like Google Analytics, Meta Ads, TikTok, Google Ads, and Pinterest, enabling streamlined ad performance tracking and optimization. Retention.com, on the other hand, specializes in email marketing through Klaviyo, emphasizing customer retention and engagement. Littledata offers a broader range of integrations, including both advertising platforms and email marketing tools like Klaviyo, along with Segment and Attentive, providing a more comprehensive view of customer interactions across various channels. This allows for enhanced data analysis and marketing strategy development.
