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

Aimerce claims to be the easiest way to capture more high-quality customer data
| Feature | Retention.com | Aimerce | Littledata |
|---|---|---|---|
| Identity resolution to boost audiences | ✔️ | ✔️ | ✔️ |
| Customer data to marketing platforms | ✔️ | ✔️ | ✔️ |
| Fully automatic, no code setup | ✔️ | ✔️ | |
| Founder owned and led | ✔️ | ✔️ | |
| Direct from Shopify's servers | ✔️ | ✔️ | |
| Works with platforms other than Shopify | ✔️ | ||
| 30 day free trial | ✔️ | ||
| Natively supports Shopify Markets | ✔️ | ||
| Automatic tracking of checkout steps | ✔️ |
Retention.com focuses on identity resolution for recovering lost shoppers and boosting Klaviyo flows, but is primarily Shopify-focused for its core value prop and doesn't emphasize server-side data collection.
Aimerce offers identity resolution and a no-code setup, and pulls data directly from Shopify's servers — giving it stronger event capture than browser-based tools.
Where Littledata wins over both:
For a Shopify Plus brand needing reliable, full-funnel data, Littledata's server-side foundation and native Shopify depth make it the stronger choice.
| Retention.com | Aimerce | Littledata | |
|---|---|---|---|
| Example product review | "Aimerce has been a total game-changer for our ad campaigns. The setup was incredibly easy, and we saw immediate improvements in both ad performance and event tracking accuracy." | "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." | "Aimerce's customer service is non-existent... no response to inquiries, leaving us frustrated and unsupported." | "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 | Retention.com | Aimerce | Littledata |
|---|---|---|---|
| 50 orders / month | $500 | $299 | $39 |
| 500 orders / month | $500 | $299 | $199 |
| 5,000 orders / month | $2000 | $499 | $449 |
| 20,000 orders / month | $5000 | $1799 | $1390 |
For 50 orders, Retention.com is 69% more expensive than Aimerce and 1,179% more than Littledata. At 500 orders, Retention.com and Aimerce are equal, while Littledata is 70% cheaper than both. For 5,000 orders, Retention.com is 302% more than Aimerce and 472% more than Littledata. At 20,000 orders, Retention.com is 178% more than Aimerce and 526% more than Littledata. Overall, Retention.com consistently has the highest pricing across all order volumes.
| Destination | Retention.com | Aimerce | Littledata |
|---|---|---|---|
| Klaviyo | ✔️ | ✔️ | ✔️ |
| Meta Ads | ✔️ | ✔️ | |
| Google Ads | ✔️ | ✔️ | |
| Google Analytics | ✔️ | ||
| TikTok | ✔️ | ||
| ✔️ | |||
| Segment | ✔️ | ||
| Attentive | ✔️ | ||
| Microsoft Ads | ✔️ |
Retention.com → Klaviyo only Focused purely on identity resolution and email list growth; Klaviyo is the single destination, making it a specialized email capture tool rather than a full tracking stack.
Aimerce → Klaviyo, Meta Ads, Google Ads Broader than Retention.com, covering email retention plus paid social and search ad optimization — useful for improving ROAS alongside owned-channel performance.
Littledata → 9 destinations The most comprehensive option, covering analytics (GA4), paid media (Meta, Google, TikTok, Pinterest, Microsoft), email/SMS (Klaviyo, Attentive), and data infrastructure (Segment). Best suited if you need a unified server-side data layer feeding multiple channels simultaneously.
Bottom line: Retention.com = email growth; Aimerce = email + core paid media; Littledata = full-stack multi-channel tracking.
| Feature | Retention.com | Aimerce | Littledata |
|---|---|---|---|
| Identity resolution | |||
| Uses other marketing channel cookies to boost identity | ✔️ | ✔️ | |
| Direct from Shopify's servers | ✔️ | ✔️ | |
| Docs on how an end-user can opt out for GDPR / CCPA | ✔️ | ||
| Never adds new emails to your marketing list | ✔️ | ||
| Backstitches Klaviyo profile onto previous customer events | ✔️ | ||
| Viewed Product trigger | |||
| Backwards compatible with Klaviyo templates | ✔️ | ✔️ | |
| Tracked server-side | ✔️ | ||
| Enriched product info (e.g. category) | ✔️ | ||
| Added to Cart trigger | |||
| Unreliable tracking of button clicks | ✔️ | ✔️ | |
| Backwards compatible with Klaviyo templates | ✔️ | ✔️ | |
| Reliable via Shopify's servers | ✔️ | ||
| Enriched product info (e.g. category) | ✔️ | ||
| Target the whole contents of the cart | ✔️ | ||
| Checkout Started trigger | |||
| Backwards compatible with Klaviyo templates | ✔️ | ✔️ | |
| Direct from Shopify's servers | ✔️ | ✔️ | |
| Tracked via the checkout page | ✔️ | ||
