Concepts referenced in this article, defined.
Run rigorous A/B tests and personalize every visit on Shopify or any storefront โ no engineers required.
CustomFit.ai and Replo solve fundamentally different problems โ understanding this distinction will save you money and time. Replo is a page builder: it helps you design and publish landing pages and Shopify sections faster. CustomFit.ai is a CRO platform: it helps you figure out which version of those pages actually converts better, then automatically serves the winner. Most high-growth D2C brands need both โ but if you're trying to increase conversion rate and revenue per visitor, CustomFit.ai is the direct answer.
| Feature | CustomFit.ai | Replo |
|---|---|---|
| Shopify native integration | โ | โ |
| No-code visual editor | โ (for testing) | โ (for building) |
| A/B testing | โ | Not built-in |
| Personalization engine | โ | No |
| D2C/ecommerce metrics (AOV, RPV) | โ | No (design tool) |
| AI-powered optimization | โ | No |
| 14-day free trial | โ | โ |
| Starting price | $99/mo | $99/mo |
| Developer required | No | No |
| Purpose | CRO / Experimentation | Page building |
This is the most important thing to understand before choosing between these tools.
Replo gives you a drag-and-drop editor to build Shopify landing pages, product pages, and custom sections โ faster than coding, with more design flexibility than Shopify's native theme editor. You end up with a well-designed page.
CustomFit.ai answers the question: does this version of the page convert better than the alternative? It lets you run A/B testing experiments, personalize content by audience segment, and uses AI to allocate traffic toward higher-converting variants automatically.
A common workflow: use Replo to build your landing page, then use CustomFit.ai to test headline variations, CTA placements, and social proof positions to find what actually drives purchases. They're complementary tools โ but if you have to choose one for revenue impact, the CRO platform (CustomFit.ai) generates measurable ROI through experimentation.
CustomFit.ai installs from the Shopify App Store in one click, with no developer involvement. The visual editor overlays on your existing pages, meaning you test on live traffic without rebuilding anything. You can have your first experiment running in under an hour.
Replo also installs without a developer and has a polished onboarding experience. Building your first page with Replo takes longer โ it's a creation tool, so there's a design workflow involved. For teams comfortable in design tools, Replo's learning curve is manageable.
CustomFit.ai is built for structured experimentation:
Replo does not have native A/B testing. Some Replo users use it alongside Shopify's built-in analytics or a separate testing tool. But without a dedicated CRO platform, you're building pages and guessing at what works rather than measuring it.
CustomFit.ai customers achieve an average 11% CVR increase. Bellavita saw an 11% conversion rate lift; Kapiva achieved 9.48% CVR improvement โ results that come from systematically testing hypotheses, not just publishing well-designed pages.
CustomFit.ai's personalization engine segments visitors by 1000+ attributes โ traffic source, device, geo, behavioral history, cart value, purchase history โ and serves different content to each segment. A first-time visitor from a Facebook ad sees a different hero than a returning customer who previously bought your bestseller.
This is personalization in the true sense: dynamic, data-driven, and tied to revenue outcomes.
Replo's pages are static from a personalization standpoint. You publish one version; everyone sees the same thing. You'd need to build multiple separate pages and route traffic manually to approximate what CustomFit.ai does automatically.
CustomFit.ai tracks revenue per visitor, average order value, add-to-cart rate, and conversion rate โ all segmented by experiment variant in real time. You see exactly how much each test variant is worth in dollars, not just clicks.
Replo doesn't have CRO analytics โ it integrates with Shopify analytics and third-party tools, but measuring experiment performance requires a separate stack.
| Plan | CustomFit.ai | Replo |
|---|---|---|
| Starter | $99/mo (50K MUV) | $99/mo |
| Growth | $249/mo (100K MUV) | Custom/higher tiers |
| Enterprise | Custom | Custom |
| Free trial | 14 days, no credit card | Available |
Both tools start at $99/month, but they deliver different types of value. CustomFit.ai's ROI is directly measurable โ a 5% CVR lift on a $500K/year store is $25K in incremental revenue. Page builder ROI is real but harder to isolate.
Replo is the right tool if your bottleneck is page creation speed, not optimization. If you're launching new product lines frequently, running multiple brand campaigns in parallel, or have a design team that needs to build Shopify pages faster than the native theme editor allows โ Replo solves that well. It's not trying to be a CRO platform, and for its intended purpose, it works. Many mature D2C teams use Replo alongside CustomFit.ai: Replo to build, CustomFit.ai to optimize.
If you're using Replo-built pages and want to start optimizing them with CustomFit.ai:
Most teams are up and running in one day.
Do I need Replo if I have CustomFit.ai? They serve different functions. CustomFit.ai optimizes existing pages; Replo builds new ones faster. If you're happy with your current page-building workflow in Shopify's native editor or your theme, you don't need Replo. But you do need a CRO platform like CustomFit.ai to know what's actually working.
Can CustomFit.ai edit Replo-built pages? Yes. CustomFit.ai's visual editor works on any rendered Shopify page, including those built with Replo. You can create test variants that modify Replo sections without touching the underlying Replo project.
Does Replo have A/B testing? Replo does not have built-in A/B testing as of 2025. It's a page builder, not an experimentation platform. You need a separate CRO tool to test page variants.
What's the difference between a page builder and a CRO platform? A page builder helps you create pages. A CRO platform helps you determine which version of a page converts more visitors into customers โ through A/B testing, personalization, and analytics tied to revenue metrics like average order value and revenue per visitor.
Can I measure the ROI of CustomFit.ai directly? Yes. CustomFit.ai shows revenue per visitor for each variant, so you can calculate the exact revenue impact of a winning test. For example, if a variant increases RPV by $0.50 and you have 100,000 monthly visitors, that's $50,000/month in incremental revenue.
How quickly can I start testing with CustomFit.ai after installing it? Most brands run their first experiment within the same day they install. The visual editor requires no code, and the Shopify integration auto-tracks key events like add-to-cart and purchase.