
Fueled is a new tool for collecting and organizing 1st-party eCommerce customer data across the sales and marketing tools you love. Shopify, BigCommerce, Yotpo, Gorgias...We capture data from all of these channels, so that you can use it wherever and how ever you want.

Retention.com's identity resolution software helps Shopify merchants recover lost shoppers and increase Klaviyo flow revenue.
| Feature | Fueled | Retention.com | Littledata |
|---|---|---|---|
| Customer data to marketing platforms | ✔️ | ✔️ | ✔️ |
| Direct from Shopify's servers | ✔️ | ✔️ | |
| Works with platforms other than Shopify | ✔️ | ✔️ | |
| Founder owned and led | ✔️ | ✔️ | |
| Identity resolution to boost audiences | ✔️ | ✔️ | |
| 30 day free trial | ✔️ | ||
| Fully automatic, no code setup | ✔️ | ||
| Natively supports Shopify Markets | ✔️ | ||
| Automatic tracking of checkout steps | ✔️ | ||
| Built For Shopify | ✔️ |
Neither Fueled nor Retention.com is Littledata, so here's where Littledata wins:
Fueled vs Retention.com vs Littledata
Fueled focuses on aggregating 1st-party data across multiple platforms (Shopify, BigCommerce, Yotpo, Gorgias), making it flexible but broader in scope. Retention.com specializes in identity resolution to recover lost shoppers and boost Klaviyo flows.
Where Littledata wins over both:
For a Shopify Plus brand prioritizing data completeness, Littledata's server-side foundation is a significant advantage.
Fueled vs Retention.com's customer reviews
| Fueled | Retention.com | Littledata | |
|---|---|---|---|
| Example product review | "It's disheartening to hear about the app developer's refusal to enable enhanced conversion tracking without additional charges... It almost seems like price gouging for Shopify merchants to compensate for losses from the BigCommerce side." | "We were having difficulties with accurate and consistent revenue attribution...With Littledata implemented, we now get consistent and accurate revenue attribution." | |
| Example support review | "Customer support is non-existent, and responses take forever... very frustrating experience overall." | "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 | Read more reviews | Read more reviews |
Fueled vs Retention.com's monthly subscription cost
| Store size | Fueled | Retention.com | Littledata |
|---|---|---|---|
| 50 orders / month | $189 | $500 | $39 |
| 500 orders / month | $349 | $500 | $175 |
| 5,000 orders / month | $879 | $2000 | $540 |
| 20,000 orders / month | $2000 | $5000 | $1390 |
Sources: Fueled pricing, Littledata pricing. Prices last verified July 22, 2026.
| Destination | Fueled | Retention.com | Littledata |
|---|---|---|---|
| Google Analytics | ✔️ | ✔️ | |
| Segment | ✔️ | ✔️ | |
| Meta Ads | ✔️ | ✔️ | |
| Google Ads | ✔️ | ✔️ | |
| Klaviyo | ✔️ | ✔️ | |
| TikTok | ✔️ | ||
| ✔️ | |||
| Attentive | ✔️ | ||
| Microsoft Ads | ✔️ |
Fueled focuses on ad platform & analytics tracking (paid media optimization + data warehousing via Segment).
Retention.com is narrowly focused on email/SMS revenue recovery — Klaviyo is the destination because their core product is identity resolution to re-engage anonymous visitors.
Littledata offers the broadest multi-channel coverage, spanning paid media, analytics, AND owned marketing channels (Klaviyo, Attentive), making it the most versatile for a full-funnel server-side stack.
Bottom line: Retention.com solves one specific problem (list growth/recovery). Fueled suits paid media + analytics. Littledata is the most comprehensive if you want a single server-side solution covering acquisition, retention, and analytics simultaneously.

Keep comparing
See how these tools stack up against other Shopify tracking and analytics solutions.
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 August 12, 2026. Spotted something out of date? Let us know.