How each differs from Fast Bundle
Kaching Bundles
Kaching Bundles' listed plans start lower, at $14.99 a month up to $1,000 of additional revenue against Fast Bundle's $19 up to $1,000 of bundle sales. Both are rated 5.0, Kaching from 6,292 reviews and Fast Bundle from 3,545. Kaching's listing names a drag-and-drop editor. Kaching Bundles on the Shopify App Store, read 14 October 2026 (opens in a new tab) Fast Bundle on the Shopify App Store, read 14 October 2026 (opens in a new tab)
MarginBundle
MarginBundle has a free plan for one active offer, and its paid plans run from $10 to $25 a month where Fast Bundle's shown plans run from $19 to $139 with bundle sales. Its listing adds a margin check on the product costs you enter. It has no reviews yet. MarginBundle on the Shopify App Store, read 14 October 2026 (opens in a new tab) Fast Bundle on the Shopify App Store, read 14 October 2026 (opens in a new tab)
Rebuy
Rebuy's listing covers the cart, checkout, post-purchase offers, search and A/B testing, with bundles as one part. It starts at $25 a month and scales with orders, where Fast Bundle's price follows bundle sales. Rebuy on the Shopify App Store, read 14 October 2026 (opens in a new tab) Fast Bundle on the Shopify App Store, read 14 October 2026 (opens in a new tab)
Where Offer Suite fits
For measuring and verifying bundles on profit, yes; for a ready-made bundle widget, no. Offer Suite's bundle calculator is on this site and free to use either way.
Offer Suite is not open yet: it can't be tried until brands are invited from the waitlist.
Questions
What are the alternatives to Fast Bundle?
This page lists Kaching Bundles, MarginBundle and Rebuy, each described from its own Shopify App Store listing, and says how each differs from Fast Bundle. Offer Suite does part of the same job and is not open yet.
Which Fast Bundle alternative checks a bundle's margin?
MarginBundle's listing says you enter product costs to review offer margins before publishing. Offer Suite forecasts each option of an offer after unit cost, fulfilment, card fees and refunds, and is not open yet.
Sources
- Fast Bundle on the Shopify App Store read 14 October 2026
- Kaching Bundles on the Shopify App Store read 14 October 2026
- MarginBundle on the Shopify App Store read 14 October 2026
- Rebuy on the Shopify App Store read 14 October 2026
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