ShopFast vs SellAuth: payments, delivery and fraud tools compared

SellAuth and ShopFast have the same basic deal: buyers pay into payment accounts you own, and the platform adds no fee per sale. The differences are in what each includes, which features need a paid plan, and the tools around the checkout. Everything about SellAuth below comes from its own documentation in October 2026.

#Where is SellAuth strong?

• A very wide gateway list. SellAuth's docs list more than 15 card processors, platforms such as Lemon Squeezy, Whop and Shopify, and wallets and transfers including PayPal, Cash App, Venmo, Zelle and Skrill.
• Crypto without a payout cycle. Buyers pay into a wallet SellAuth generates for the shop, and the funds are forwarded to your address.
• Developer tooling. A REST API, a checkout API, a reseller API and a theme CLI, with storefronts editable in a visual editor, an AI editor or code.
• Fraud rules. Blacklist and whitelist rules on every plan, and advanced rules on VPN, Tor, country and network.

#What does a free ShopFast store include?

On SellAuth, custom domains, subscriptions, crypto beyond Bitcoin and Litecoin, and dispute tools depend on the plan. On ShopFast, a free store includes:

• Your own domain, or yourname.shopfa.st.
• Crypto to your own wallet: BTC, LTC, ETH, USDC and USDT, from an xpub or an address, with no processor in between. BTCPay Server, NOWPayments, Cryptomus and Heleket work too.
• Fraud Shield on every checkout, before and after payment: blocklists, VPN and proxy checks, rules, a risk score, an email code or 3-D Secure step for risky buyers, and a review queue. Disputes get an evidence pack built from the delivery log.
• Product status pages, shown on product pages and cards.
• Discord roles and a bot with /buy and /redeem for buyers and /lookup, /restock and /push-invoice for staff.
• Auto-renew for subscriptions and duration keys, on a saved card.

#How do reviews work on each?

SellAuth sellers can reply to reviews, dispute them and reward them with a coupon. SellAuth also has an optional setting that posts a 5-star review when a buyer leaves none within 7 days. On ShopFast, buyers are asked for a review through a signed link from their order, reviews tied to a paid order are marked verified, and sellers can reply and reward a review with a coupon.

#How do I move from SellAuth to ShopFast?

Open Settings → Import → Switch platforms and pick SellAuth. Drop in your exports, or paste an API key to pull products, deliverables, customers, coupons and invoices directly; the key is used for that pull only and never stored. A dry run checks every row before anything is written, and the whole import can be rolled back. The switching guide has the details.