Fast Simon vs Rebuy
Fast Simon uniquely has 5 features.
| Fast Simon | Rebuy | |
|---|---|---|
| Company | ||
| Founded | 2016 | 2018 |
| HQ | Palo Alto, USA | Boise, USA |
| AI model | Proprietary | Proprietary ML/AI prediction engine |
| User base | Thousands of stores worldwide | 50,000+ Shopify brands |
| Platforms | Web, Shopify, BigCommerce, Magento, WooCommerce, Wix, Headless/Custom, iOS SDK, Android SDK | Web (Shopify app) |
| Languages | English plus multi-language/cross-border support | English primarily |
| Pricing | ||
| Pricing model | Custom | Usage-based |
| Free plan | No — no permanent free tier; 14-day free trial available | Yes — Rebuy Monetize is free (post-purchase offers from partner brands, earn $0.20–$0.35+ per transaction) |
| Free trial | Yes — 14 days | Yes — 14 days (packages); 30 days (Platform One) |
| Starting price | Custom — Starter | $25/mo — Custom Package (à la carte) |
| Enterprise | Custom — contact Enterprise Sales | Custom |
| Refund policy | — | Money-back guarantee on all plans; refund requests within 60 days of billing, calculated per month; goodwill usage effort required |
| All plans | StarterRequest PricingEssentialRequest PricingGrowthRequest PricingEnterpriseContact Sales | Rebuy MonetizeFreeCustom Package (Build Your Own)From $25/mo usageEnterpriseCustom |
| Positioning | ||
| Best for | E-commerce brands and retailers on Shopify, BigCommerce, Magento, or WooCommerce seeking AI-powered search, merchandising, and personalization | Shopify and Shopify Plus brands looking to boost AOV, LTV, and conversion via AI-driven personalization and upsells |
| Differentiator | Unified AI platform combining conversational shopping agents, visual discovery, AI merchandising, and real-time personalization across all major e-commerce platforms with no-code setup. | Rebuy is the only Shopify-native personalization platform combining AI-powered product recommendations, a fully customizable Smart Cart, dynamic bundles, and A/B testing in a single à la carte engine that has driven $3.8B+ in merchant revenue. |
| Competitors | Algolia, Bloomreach, Nosto, Searchspring, Constructor.io | LimeSpot, Frequently Bought Together, Intelligems, Reconvert, Zipify Pages |
| Features | ||
| Ab Testing | ✓ | ✓ |
| Ad Copy Gen | ✕ | ✕ |
| Bulk Upload | ✓ | ✕ |
| Competitor Monitoring | ✕ | ✕ |
| Image Editing | ✓ | ✕ |
| Inventory Integration | ✓ | ✓ |
| Marketplace Listing | ✕ | ✕ |
| Pricing Intelligence | ✓ | ✓ |
| Product Data Enrichment | ✓ | ✓ |
| Product Description Gen | ✓ | ✕ |
| Review Analysis | ✓ | ✕ |
| SEO Title Optimization | ✕ | ✕ |
| Integrations | ||
| Amazon | ✕ | ✕ |
| API Access | ✓ | ✓ |
| Etsy | ✕ | ✕ |
| Key Integrations | Shopify, BigCommerce, Magento, WooCommerce, Wix, Tapcart, Attentive, Klaviyo, Hydrogen, Reviews.io, CDP Platforms, Mobile App Builders | Shopify, Shopify Plus, Gorgias, Okendo, Sticky Digital, Ambaum Agency, 35+ pre-built tech integrations via Smart Cart |
| Shopify | ✓ | ✓ |
| Woocommerce | ✓ | ✕ |
| Zapier | ✕ | — |