Retention.com vs Addingwell

Addingwell is better for Shopify brands needing paid media tracking; Retention.com specializes in email.

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 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 vs Addingwell comparison

FeatureRetention.comAddingwellLittledata
Identity resolution to boost audiences✔️minus✔️
Customer data to marketing platforms✔️minus✔️
Works with platforms other than Shopify✔️✔️minus
Via server-side Google Tag Managerminus✔️minus
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✔️

Retention.com focuses on identity resolution to recover anonymous shoppers and boost Klaviyo flows — useful for email/SMS retargeting but not a full tracking/data collection solution.

Addingwell is server-side GTM hosting, improving tag performance and data quality — but still relies on browser-initiated events, limiting visibility into server-side Shopify events.

Where Littledata wins: Neither competitor pulls data directly from Shopify's servers, which is critical for a Shopify Plus brand. This means both miss server-side events (checkout steps, order updates) that browsers don't capture, and can't fully enrich events with customer data.

Littledata wins by being:

  • Fully automatic, no-code — faster deployment
  • Native Shopify Markets support — essential for international Shopify Plus operations
  • Complete checkout tracking — captured server-side, not browser-dependent
  • 30-day free trial — low-risk evaluation

For a Shopify Plus brand prioritizing data completeness, Littledata offers a more reliable foundation than either alternative.

Reviews comparison

Retention.com vs Addingwell's customer reviews

Retention.comAddingwellLittledata
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 review"Unfortunately, the team... very high employee turnover; it can be really frustrating to have to re-explain things to new reps."The support was very fast to answer our questions and super helpful. Just be careful to check that the events don't trigger twice."Customer support is absolutely amazing... you can never go wrong when an app does what it says and tacks on great service!"
LinkRead more reviewsRead more reviewsRead more reviews

Cost comparison

Retention.com vs Addingwell's monthly subscription cost

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

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

For an online store with 50 orders per month, Retention.com is 456% more expensive than Addingwell and 1185% more than Littledata. At 500 orders, Retention.com is 0% more than Addingwell and 186% more than Littledata. For 5000 orders, Retention.com is 1438% more than Addingwell and 270% more than Littledata. Finally, at 20000 orders, Retention.com is 1150% more than Addingwell and 284% more than Littledata. Implementation costs significantly affect the total for Addingwell and Retention.com at higher order volumes.

Supported data destinations

DestinationRetention.comAddingwellLittledata
Klaviyo✔️minus✔️
Google Analyticsminus✔️✔️
Meta Adsminus✔️✔️
TikTokminus✔️✔️
Google Adsminus✔️✔️
Pinterestminus✔️✔️
Microsoft Adsminus✔️✔️
Snapminus✔️minus
Segmentminusminus✔️
Attentiveminusminus✔️

Retention.com focuses solely on Klaviyo, making it a specialized email/SMS identity resolution tool rather than a true multi-channel tracking solution.

Addingwell covers paid media platforms (Meta, Google Ads, TikTok, Pinterest, Snap, Microsoft) plus GA4 — ideal if your priority is improving ad platform signal quality and ROAS.

Littledata offers the broadest destination mix, combining paid media, analytics (GA4), and owned marketing channels (Klaviyo, Attentive, Segment) — making it the most comprehensive server-side solution if you need a single pipeline feeding both your ad platforms and your CRM/CDP stack simultaneously.

Bottom line: Retention.com = identity resolution; Addingwell = paid media focus; Littledata = full-funnel coverage across paid, analytics, and owned channels.

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 Retention.com against Addingwell
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.

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.

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.

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.

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.

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.

Which marketing tools does Retention.com support?

Retention.com supports Klaviyo.

Which marketing tools does Addingwell support?

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

Who owns Retention.com?

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

Who owns Addingwell?

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