CustomFit AI A/B Testing & CRO

Boost sales with no-code website personalization & AB testing

by CustomFit.ai · Launched: May 2023 · Free plan available.

5.0 (19) on Shopify Used by 14 Shopify stores

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No-code A/B Testing and Website Personalization CRO platform built for marketers

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About CustomFit AI A/B Testing & CRO

CustomFit.ai is an easy no-code platform for marketers for A/B testing, personalization, and popups. Easily run A/B tests on any page—product pages, home page, checkout page—to identify what drives the most sales. Beyond modifying existing content, you can add new content blocks with drag-and-drop simplicity, such as UGC video reels, recently viewed or purchased items, and more. Leverage AI Machine Learning to optimize conversion rates (CRO), boost revenue, and enhance upselling strategies AI Conversion Optimization: Leverage Machine Learning to optimize conversions No code, A/B Testing, Split URL testing, Theme A/B testing, and A/B/N testing Easy to use No code visual editor to personalize product pages & landing pages Add new blocks like Video Reels, Recently Viewed items, and more via drag-n-drop SEO-friendly with fast performance and a flicker-free experience. Show more Show less

Last verified: July 16, 2026 · Fresh

App details

Developer: CustomFit.ai
Category: Marketing & conversion
Pricing: Free plan available
Launched: May 2023
Rating: 5.0 (19) on Shopify

Key features

Available for development stores only
1 Campaigns
A/B Testing
Support on online & phone
No-code AI Visual Editor

Integrations with:

Amplitude, Big Query, Checkout, Google Analytics 4 (GA4), Heap, Microsoft Clarity (MS Clarity), MixPanel

3 plans · starts free · 14-day free trial

Free (Dev stores)

Free

10000 visitors/mo

$79/month

25000 visitors/mo

$139/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 18 Shopify App Store reviews

Use the arrows to read individual reviews

We evaluated CustomFit for A/B testing and personalization on our Shopify store, and the experience was excellent throughout. The product is capable and well thought out, and setup was smoother than we expected.

— Foxtale

CustomFit is an amazing app for running A/B tests and personalizing a Shopify store without any coding. The interface is very easy to use, and setting up experiments takes just a few minutes. It’s helped us test different ideas quickly and improve our store’s performance. Highly recommend it to any Shopify merchant looking to optimize for conversions!

— Emma Sleep India

A brilliant A/B test tool for all teams from tech, marketing, to product.

— Neude Skin

Super easy to set up and really user-friendly. We ran A/B tests and personalized our site without needing any dev support. Also, their customer service team is quick to respond and genuinely helpful.

— Nuvie

We’ve been using CustomFit.ai on our Shopify store for a few months now, running multiple A/B tests and personalisation experiments. The setup is incredibly smooth changes go live instantly and there’s absolutely no impact on site speed. The platform has helped us drive clear improvements in engagement and conversions, and we’ve been able to execute experiments faster than ever. A special shouto...

— Fitelo Store

this is hands down the best A/B testing app out there. i had the chance to get in touch with the founder- Ashwin, and the guy is a gem. so helpful and informative and will help out any way he can

— Noorly™

We've had a great experience using CustomFit.ai on our website. The platform has been incredibly helpful for running a variety of A/B tests, allowing us to experiment with different content, layouts, and user journeys seamlessly. What truly stood out is the performance and reliability — the testing outcomes were accurate and actionable, helping us make confident decisions that improved our conver...

— Reginald Men

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— Caresmith

I was amazed at how quickly we could start using CustomFit.ai. Setting up A/B tests and personalizing our pages was straightforward, with no coding required. The performance is excellent, and the best part- support team is always just a message away and super helpful!

— GIVA Jewellery

The support team at CustomFit.ai is amazing! Super responsive, always helpful, and they’ve made our experience so much smoother. It’s great knowing we can reach out anytime and get quick answers.

— Knya

We're huge fans of CustomFit.ai at our Shopify store. It's made A/B testing and personalization so much easier and more effective. I have tried using A/B platforms earlier and have found them complex for a non-techie. The platform is super fast & very easy to use. It doesn't cause any annoying flicker. And whenever we have a question, their support team is always quick to help.

— Typsy Beauty

CustomFit.ai is an incredible tool for any Shopify store looking to optimize their customer experience. We’ve used it for both A/B testing and personalization, and it’s been fantastic. The platform is fast, easy to navigate, and our site runs smoothly with no flicker. Customer support is always just a message away and super helpful

— Innovist

```"CustomFit.ai is the perfect tool for anyone looking to improve their Shopify store through A/B testing and personalization. It’s fast, doesn’t require any coding, and our site runs flawlessly with no flicker. The customer support team has been a huge help, always there when we need them." ```

— Conscious Chemist

CustomFit.ai has been a game-changer for our store. We can run detailed A/B tests and personalize content without needing a developer. The platform is super quick, and our site runs without any flicker, which is crucial for us. Plus, their customer support is exceptional—they always have our back.

— The Sleep Company

5 out of 5

— Wellbeing Nutrition

CustomFit.ai is an incredible tool for any Shopify store looking to optimize their customer experience. We’ve used it for both A/B testing and personalization, and it’s been fantastic. The platform is fast, easy to navigate, and our site runs smoothly with no flicker. Customer support is always just a message away and super helpful.

— Pattrn.hair

Great tool, amazing team. If you are scaling up, this tool is a must for your Shopify store.

— Dharishah Ayurveda

I recently had the pleasure of using CustomFit for our D2C brand, Healofy, and I must say it has improved our marketing strategy. As a hardcore marketer at Healofy, I'm always on the lookout for tools that can enhance our brand's performance, and CustomFit has exceeded my expectations. The user-friendly no-code approach to website personalization and A/B testing has made it easy for us to create t...

— Healofy

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