# CustomFit.ai > CustomFit.ai is the website personalization, A/B testing, and conversion-rate-optimization (CRO) platform built for D2C and Shopify ecommerce brands. It adapts every visitor's storefront — copy, offers, products, and themes — in real time based on geo, traffic source, intent, and behavior. AI Copilot generates experiences from a prompt. AI Wingman auto-optimizes toward winners. AI Conversion Optimizer picks the variation per visitor. No engineers, no flicker, every experience runs as an A/B test. Trusted by 2,400+ ecommerce brands including Mamaearth, GIVA, Kapiva, Bellavita, Chargebee, and The Sleep Company. ## What CustomFit.ai is - D2C-native CRO platform (Shopify, WooCommerce, BigCommerce, Shopline, Shoplazza, custom React/Next.js) - Real-time website personalization driven by 40+ built-in signals (geo, device, weather, source, UTM, session count, cart value, products viewed) - Rigorous A/B testing with Bayesian + Frequentist engines, segment-aware verdicts, and revenue-per-visitor metrics - AI Copilot: build experiences and tests from a natural-language prompt - AI Wingman: 24/7 agent fleet that audits pages, watches competitors, and one-click-deploys winners - AI Conversion Optimizer: picks the best variation per visitor in real time, guardrailed - Edge-side rendering with zero flicker (Core Web Vitals stay green) ## Products - [Website Personalization](https://www.customfit.ai/personalization): real-time storefront personalization for D2C — copy, offers, products, themes - [A/B & Multivariate Testing](https://www.customfit.ai/ab-testing): segment-aware experimentation that proves the winner on revenue - [AI Copilot](https://www.customfit.ai/ai-copilot): personalize and test with a prompt - [AI Wingman](https://www.customfit.ai/ai-wingman): autonomous CRO agent fleet — discover, propose, deploy - [AI Conversion Optimizer](https://www.customfit.ai/ai-conversion-optimizer): per-visitor variation picker with explore/exploit guardrails - [No-Code Visual Editor](https://www.customfit.ai/visual-editor): edit your live store visually — no theme touch - [Feature Flags](https://www.customfit.ai/feature-flags): ship safely with kill-switches across Web, iOS, Android, Flutter, RN - [Chrome Extension](https://www.customfit.ai/chrome-extension): edit and preview your store in the browser - [Widgets](https://www.customfit.ai/widgets): 100+ drop-in conversion widgets (urgency, social proof, cart, gamification) - [Product Recommendations](https://www.customfit.ai/product-recommendations): personalized PDPs, FBT bundles, cart cross-sells ## Pricing - [Pricing](https://www.customfit.ai/pricing): usage-based, no per-seat fees, unlimited users - [ROI Calculator](https://www.customfit.ai/roi-calculator): estimate revenue lift from CRO + personalization (free, no signup) - 14-day free trial, no credit card ## Use Cases & Playbooks - [Geo Personalization](https://www.customfit.ai/use-cases/geo-personalization): currency, language, shipping per country/city - [Price A/B Testing](https://www.customfit.ai/use-cases/price-ab-testing): test price points to maximize profit, not just CVR - [Theme A/B Testing](https://www.customfit.ai/use-cases/theme-ab-testing): test entire store themes safely - [Buyer-Intent Nudges](https://www.customfit.ai/use-cases/buyer-intent-nudges): exit-intent + on-site recovery - [Split-URL Testing](https://www.customfit.ai/use-cases/split-url-testing): test radically different landing pages - [Cart Abandonment Recovery](https://www.customfit.ai/cart-abandonment-recovery): on-site + off-site recovery plays - [Landing Page Optimization](https://www.customfit.ai/landing-page-optimization): message match + per-source personalization - [Conversion Rate Optimization](https://www.customfit.ai/conversion-rate-optimization): the CRO operating system for D2C ### Visitor-type personalization playbooks - [First-time visitors](https://www.customfit.ai/personalize/first-time-visitor) - [Repeat visitors](https://www.customfit.ai/personalize/repeat-visitor) - [Repeat customers](https://www.customfit.ai/personalize/repeat-customer) - [Location-based](https://www.customfit.ai/personalize/location-based) - [Age-group](https://www.customfit.ai/personalize/age-group) - [Gender](https://www.customfit.ai/personalize/gender) - [Campaign-based](https://www.customfit.ai/personalize/campaign-based) ### CRO playbooks - [PDP Conversion](https://www.customfit.ai/playbooks/pdp-conversion) - [First-Time Buyer](https://www.customfit.ai/playbooks/first-time-buyer) - [Returning Buyer](https://www.customfit.ai/playbooks/returning-buyer) - [AOV Lift](https://www.customfit.ai/playbooks/aov-lift) - [Cart Recovery](https://www.customfit.ai/playbooks/cart-recovery) - [Mobile-First](https://www.customfit.ai/playbooks/mobile-first) - [Festive Campaign](https://www.customfit.ai/playbooks/festive-campaign) - [Subscription](https://www.customfit.ai/playbooks/subscription) - [Ad-to-Page Match](https://www.customfit.ai/playbooks/ad-to-page-match) ## Platform-specific landings - [Shopify Personalization](https://www.customfit.ai/shopify-personalization) - [Shopify A/B Testing](https://www.customfit.ai/shopify-ab-testing) - [A/B Testing Software (buyer's guide)](https://www.customfit.ai/ab-testing-software) ## Customers & Proof - [Case Studies](https://www.customfit.ai/case-studies): Bellavita, Kapiva, Chargebee, The Sleep Company, GIVA - [Recognition](https://www.customfit.ai/recognition) - [Why CustomFit](https://www.customfit.ai/why-customfit) ## Comparisons (vs other CRO platforms) - [vs VWO](https://www.customfit.ai/vs/vwo) - [vs Optimizely](https://www.customfit.ai/vs/optimizely) - [vs Mutiny](https://www.customfit.ai/vs/mutiny) - [vs AB Tasty](https://www.customfit.ai/vs/abtasty) - [vs Convert](https://www.customfit.ai/vs/convert) - [vs Google Optimize](https://www.customfit.ai/vs/google-optimize) - [vs Visually.io](https://www.customfit.ai/vs/visually) - [vs Intelligems](https://www.customfit.ai/vs/intelligems) - [vs Kameleoon](https://www.customfit.ai/vs/kameleoon) - [vs Shoplift](https://www.customfit.ai/vs/shoplift) - [vs Shogun](https://www.customfit.ai/vs/shogun) ## Integrations (33 platforms) - Ecommerce & Checkout: [Shopify](https://www.customfit.ai/integrations/shopify), [WooCommerce](https://www.customfit.ai/integrations/woocommerce), [BigCommerce](https://www.customfit.ai/integrations/bigcommerce), [Shopline](https://www.customfit.ai/integrations/shopline), [Shoplazza](https://www.customfit.ai/integrations/shoplazza), [GoKwik](https://www.customfit.ai/integrations/gokwik), [ShopFlo](https://www.customfit.ai/integrations/shopflo), [Razorpay Magic Checkout](https://www.customfit.ai/integrations/razorpay-magic-checkout), [Breeze](https://www.customfit.ai/integrations/breeze), [Shiprocket](https://www.customfit.ai/integrations/shiprocket) - Analytics: [Google Analytics 4](https://www.customfit.ai/integrations/google-analytics-4), [Mixpanel](https://www.customfit.ai/integrations/mixpanel), [Amplitude](https://www.customfit.ai/integrations/amplitude), [Heap](https://www.customfit.ai/integrations/heap), [Adobe Analytics](https://www.customfit.ai/integrations/adobe-analytics), [Segment](https://www.customfit.ai/integrations/segment) - Behavior: [Hotjar](https://www.customfit.ai/integrations/hotjar), [Microsoft Clarity](https://www.customfit.ai/integrations/microsoft-clarity) - Engagement & Lifecycle: [Klaviyo](https://www.customfit.ai/integrations/klaviyo), [MoEngage](https://www.customfit.ai/integrations/moengage), [CleverTap](https://www.customfit.ai/integrations/clevertap), [WebEngage](https://www.customfit.ai/integrations/webengage), [Netcore](https://www.customfit.ai/integrations/netcore) - CRM & ABM: [HubSpot](https://www.customfit.ai/integrations/hubspot), [Salesforce](https://www.customfit.ai/integrations/salesforce), [6sense](https://www.customfit.ai/integrations/6sense), [Clearbit](https://www.customfit.ai/integrations/clearbit), [KickFire](https://www.customfit.ai/integrations/kickfire), [Geo Fit](https://www.customfit.ai/integrations/geo-fit) - Ads & Productivity: [Meta](https://www.customfit.ai/integrations/meta), [Slack](https://www.customfit.ai/integrations/slack), [Webflow](https://www.customfit.ai/integrations/webflow), [WordPress](https://www.customfit.ai/integrations/wordpress) ## Pillar Guides (in-depth) - [Website Personalization: The Complete Guide for D2C Brands](https://www.customfit.ai/blog/website-personalization): Everything you need to know about website personalization — strategy, implementation, and proven tactics for D2C and ecommerce brands that lift conversions. - [Shopify & Ecommerce A/B Testing: The Complete Guide](https://www.customfit.ai/blog/shopify-ecommerce-ab-testing): Everything you need to know about A/B testing for Shopify and ecommerce stores — from setup to statistical significance to conversion wins. - [Conversion Rate Optimization (CRO): The Complete Playbook for D2C Brands](https://www.customfit.ai/blog/cro): A comprehensive CRO guide covering landing pages, product pages, checkout flows, and analytics — built for D2C and ecommerce brands that want measurable revenue growth. - [AI-Powered Marketing: How to Personalize, Test, and Convert at Scale](https://www.customfit.ai/blog/ai-powered-marketing): Discover how AI-powered marketing automates personalization, predicts buyer intent, and optimizes your ecommerce site — without a data science team. - [A/B Testing: The Complete Guide for Ecommerce & D2C Brands](https://www.customfit.ai/blog/ab-testing): Master A/B testing — from hypothesis to statistical significance — with practical examples for Shopify, WooCommerce, and D2C brands that want data-backed decisions. ## Resources - [Blog](https://www.customfit.ai/blog): 754 articles on CRO, A/B testing, personalization, and D2C growth - [Conversion Glossary](https://www.customfit.ai/conversion-glossary): 212 CRO terms defined - [Playbooks](https://www.customfit.ai/playbooks): proven CRO recipes by goal - [Webinars](https://www.customfit.ai/webinars) - [Interviews](https://www.customfit.ai/interviews): GrowthFit interviews with D2C leaders - [E-Books](https://www.customfit.ai/ebooks) - [Changelog](https://www.customfit.ai/changelog) - Complete machine-readable index of every article and glossary term: https://www.customfit.ai/llms-full.txt ## Company & Legal - [About](https://www.customfit.ai/about) - [Contact](https://www.customfit.ai/contact) - [Partners](https://www.customfit.ai/partners) - [Security](https://www.customfit.ai/security) (SOC 2, ISO 27001, GDPR, CCPA) - [Privacy](https://www.customfit.ai/privacy) - [Terms](https://www.customfit.ai/terms) - [Sub-Processors](https://www.customfit.ai/sub-processors) ## Optional - Sitemap: https://www.customfit.ai/sitemap.xml - Full content index: https://www.customfit.ai/llms-full.txt - Founded 2021. HQ Bengaluru, India. - Median lift: +18% revenue per visitor across 2,400+ stores.