Short answer: Digital download cart platforms add checkout and automatic file delivery to a site or link you control. For PayPal sellers who want reliable fulfillment at a flat fee, Payloadz Seller is a $1 trial for 14 days and no Payloadz transaction fee (PayPal processing fees still apply). Sellfy, SendOwl, ThriveCart, Gumroad, and Payhip emphasize hosted shops, embed carts, or funnel upsells—use this hub to match the tool to how you sell.
Cart and checkout platforms compared
| Platform | Best for | Checkout / delivery model | Ownership of store / customer | Tax / MoR notes (qualitative) | When to choose |
|---|---|---|---|---|---|
| Payloadz | PayPal sellers wanting a $1 trial for 14 days and no Payloadz transaction fee | Buy buttons; PayPal checkout; secure delivery | You own site and PayPal buyers | Seller of record | Delivery reliability is the main job-to-be-done |
| SendOwl | Light cart on existing pages | Overlays, buy links, delivery | Your website | Seller of record | Minimal change to current site HTML |
| Sellfy | Hosted storefront + marketing widgets | Hosted shop with delivery | Hosted; branding options on higher tiers | Seller of record | You want store themes without WordPress |
| ThriveCart | Funnel checkouts and upsell flows | Cart pages integrated with funnels; delivery via integrations | You own funnel pages; processor via Stripe/PayPal per setup | Seller of record; tax via your stack | Complex upsell paths matter more than bare delivery |
| Gumroad | Single-link creator cart | Hosted product URLs | Platform-hosted | Seller of record | Fastest cart without funnel builder |
| Payhip | Cart + memberships | Hosted store | Hosted | Seller of record | Subscriptions bundled with downloads |
Sellfy, SendOwl, and ThriveCart compared
Sellfy
Strong when you want a polished hosted shop and marketing widgets without maintaining WordPress. Weaker when you already invested in a custom site and only need a thin cart—SendOwl or Payloadz may be simpler.
SendOwl
Strong when adding a cart to an existing blog or sales page is the goal. Less compelling if you need heavy funnel logic—that is ThriveCart territory.
ThriveCart
Strong for multi-step funnels, order bumps, and affiliate tracking on digital offers. It is not primarily a file-hosting company—you will configure delivery integrations and should test end-to-end downloads after every funnel change. Overselling ThriveCart as “set and forget delivery” is a common mistake.
Why sellers choose Payloadz
Start with a $1.00 trial for 14 days. Checked on payloadz.com on 28 October 2026, the page says there is no Payloadz transaction fee, and it lists unlimited products and no product storage limits. PayPal processing is separate. Payloadz is not a merchant of record.
Pros: Purpose-built download delivery; PayPal alignment; proven for files of many sizes; complements your own cart UI.
Cons: Not a funnel builder like ThriveCart; not a themed storefront like Sellfy; not MoR.
When competitors are better: ThriveCart for upsell-heavy launches; Sellfy for hosted shop aesthetics; SendOwl for quickest overlay on legacy pages.
Decision flow
- Need funnels and bumps? Shortlist ThriveCart; verify delivery integration.
- Need hosted shop only? Shortlist Sellfy or Gumroad.
- Need cart on current site? Shortlist SendOwl or Payloadz.
- Need global MoR tax? Leave this hub—see Lemon Squeezy / Paddle instead.