Addingwell vs Retention.com

Addingwell is cheaper, best for ad tracking; Retention.com excels at email retargeting.

Addingwell logo

What is Addingwell?

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

Retention.com logo

What is Retention.com?

Retention.com's identity resolution software helps Shopify merchants recover lost shoppers and increase Klaviyo flow revenue.

Addingwell vs Retention.com comparison

FeatureAddingwellRetention.comLittledata
Works with platforms other than Shopify✔️✔️minus
Identity resolution to boost audiencesminus✔️✔️
Customer data to marketing platformsminus✔️✔️
Via server-side Google Tag Manager✔️minusminus
30 day free trialminusminus✔️
Founder owned and ledminusminus✔️
Direct from Shopify's serversminusminus✔️
Fully automatic, no code setupminusminus✔️
Natively supports Shopify Marketsminusminus✔️
Automatic tracking of checkout stepsminusminus✔️

Addingwell focuses on server-side GTM hosting to improve tracking accuracy, ad blocker bypass, and Safari resilience — useful for tag management and performance, but it still relies on GTM's browser-side layer, limiting its ability to capture server-level Shopify events or enrich data with customer context.

Retention.com specializes in identity resolution to recover anonymous shoppers and feed audiences into platforms like Klaviyo — strong for email retargeting, but not a full tracking/data collection solution.

Neither is Littledata. Since neither offers Direct from Shopify's servers, both miss server-native event capture — meaning checkout steps, post-purchase flows, and customer-enriched data that the browser never sees can go untracked.

Littledata wins by pulling data directly from Shopify's servers with no-code setup, automatic checkout tracking, native Shopify Markets support, identity resolution, and a 30-day free trial — giving you the most complete, accurate customer journey data with minimal overhead.

Reviews comparison

Addingwell vs Retention.com's customer reviews

AddingwellRetention.comLittledata
Example product reviewSetup 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 reviewThe 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!"
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Cost comparison

Addingwell vs Retention.com's monthly subscription cost

Store sizeAddingwellRetention.comLittledata
50 orders / month$90$500$39
500 orders / month$90$500$175
5,000 orders / month$130$2000$540
20,000 orders / month$400$5000$1390

Sources: Addingwell pricing, Littledata pricing. Prices last verified July 10, 2026.

For an online store with 50 orders per month, Addingwell is 82% cheaper than Retention.com and 77% cheaper than Littledata. At 500 orders, Addingwell and Retention.com are equal, while Littledata is 94% more expensive. For 5000 orders, Addingwell is 93% cheaper than Retention.com and 76% cheaper than Littledata. At 20,000 orders, Addingwell is 92% cheaper than Retention.com and 69% cheaper than Littledata. Retention.com incurs additional implementation costs for higher order volumes.

Supported data destinations

DestinationAddingwellRetention.comLittledata
Google Analytics✔️minus✔️
Meta Ads✔️minus✔️
TikTok✔️minus✔️
Google Ads✔️minus✔️
Pinterest✔️minus✔️
Microsoft Ads✔️minus✔️
Klaviyominus✔️✔️
Snap✔️minusminus
Segmentminusminus✔️
Attentiveminusminus✔️

Addingwell focuses on ad platform tracking (paid media optimization via server-side events), improving signal quality for bidding algorithms across major ad networks.

Retention.com specializes in identity resolution + email/SMS retargeting, sending enriched visitor data exclusively to Klaviyo to recover anonymous traffic through owned channels.

Littledata offers the broadest hybrid coverage, combining ad platform destinations (like Addingwell) plus owned marketing tools (Klaviyo, Attentive) plus Segment for data warehousing — making it the most versatile stack for brands wanting both paid media accuracy and owned channel enrichment in one solution.

Bottom line: Addingwell = paid ads. Retention.com = Klaviyo identity resolution. Littledata = both, plus data infrastructure.

Benefits of Littledata
Littledata has been trusted by leading Shopify brands since 2017 for reliable server-side tracking.
100% of revenue tracked
Enhanced identity resolution
Connectors for all popular marketing channels
Learn more
Benefits of Littledata
Comparing Addingwell against Retention.com
Can I switch from Addingwell to Littledata?

Yes, join dozens of Shopify brands who made the switch to Littledata for simpler server-side tracking, faster setup, and transparent pricing. We’ll even help migrate your Addingwell setup.

Can I switch from Retention.com to Littledata?

Yes, join dozens of Shopify brands who made the switch to Littledata for simpler server-side tracking, faster setup, and transparent pricing. We’ll even help migrate your Retention.com setup.

How does Addingwell work?

Addingwell's platform makes the most out of GTM Server-Side. The downside is the GTM container can only relay what is happening on the browser, and misses server-only events like some purchases and refunds.

Does Addingwell work with Shopify?

Yes, Addingwell is installed on 700 Shopify sites according to the latest stats from BuiltWith.

How does Retention.com work?

Retention Grow uses a large third-party list of email addresses to link anonymous sessions to emails given to a third party brand. This can grow your marketing audience, but at the expense of higher spam and privacy complaints.

Does Retention.com work with Shopify?

Yes, Retention.com is installed on 1,950 Shopify sites according to the latest stats from BuiltWith.

Is Addingwell suitable for Enterprise brands?

Addingwell is used by 10 sites in the top 100,000 globally - so this solution is unlikely to be appropriate for Enterprise brands.

Is Retention.com suitable for Enterprise brands?

Retention.com is used by 1406 sites in the top 100,000 globally - so this solution is likely suitable for Enterprise scale brands.

Which marketing tools does Addingwell support?

Addingwell supports Google Analytics, Meta Ads, TikTok, Google Ads, Pinterest, Snap and Microsoft Ads.

Which marketing tools does Retention.com support?

Retention.com supports Klaviyo.

Who owns Addingwell?

Addingwell is owned by Didomi and run out of Lille, France. Romain Baert is Addingwell's CEO.

Who owns Retention.com?

Retention.com(formerly GetEmails) is an independent private company headquartered in Austin, Texas. Adam Robinson is Retention.com's CEO.

When is Addingwell a better choice than Littledata?

To keep this comparison fair: Addingwell has a lower subscription cost for stores doing 500, 5,000 and 20,000 orders per month — see the cost comparison above. And Addingwell sends data to Snap, which Littledata does not support. Weigh this against the tracking depth compared in the tables above.

How we compiled this comparison: pricing and feature data comes from each vendor's public pricing page, Shopify App Store listings, and BuiltWith usage data, reviewed by the Littledata team. Last verified July 10, 2026. Spotted something out of date? Let us know.