Company overview
Fast Bundle covers nearly every bundle format in one app, including POS, and now lists A/B testing.
Market position & usage
Appears in most 2026 bundle roundups as the breadth pick. Replaces several single-purpose bundle apps.
Feature comparison
Area
Rebuy
Fast Bundle
Bundle types
Dynamic Bundles and Bundle Builder
Fixed, mix-and-match, FBT, BXGY, build-a-box
Personalization
AI-selected components
Merchant-picked
Channels
Online Store
Online Store and POS
Head-to-head surfaces
PDP bundles
Build-a-box
Frequently bought together
Surfaces where both products show up in the same evaluation. Everything outside this list is uncontested.
Pricing
Fast Bundle
Free to about $139/mo, tiered by revenue
Rebuy packages start at $25/mo plus per-order usage. Competitor prices are from public pages and third-party reviews; confirm before quoting.
Where Rebuy wins
Rebuy advantage
Personalization
Bundle components adapt to the shopper and product.
Cross-funnel
Bundles connect to cart, checkout, and post purchase.
Consolidation
Customers cite replacing Fast Bundle when moving onto Rebuy.
Where Fast Bundle has the edge
Their advantage
Bundle breadth
More formats out of the box.
POS
Bundles work in retail.
Price
Free entry tier.
Objections
“Fast Bundle has more bundle types.”
Ask which types they actually run; most stores use two. Show those two with personalization and cart integration.
What customers tell us
Mentioned in consolidation feedback
Named alongside UpCart as an app merchants replace when consolidating onto Rebuy.
Source material
Shopify App Store listing: Fast Bundle
Growthpolis, Fast Bundle alternatives (Sep 2026)
Rebuy customer feedback records, Nov 2023–Sep 2026
Rebuy · Confidential sales resource