Postsale is multi-carrier ecommerce shipping software for online merchants. The platform compares rates across USPS, UPS, and FedEx, creates shipping labels, and sends branded tracking emails, invoices, and packing slips. Merchants can issue pay-on-use return labels and add Shipsurance shipment protection. Plans are monthly from 9.99 USD (200 shipments) to 169.99 USD (unlimited). There is no per-label software fee. A 14-day free trial is available. There is no annual contract. USPS commercial rates via USPS Connect eCommerce. UPS and FedEx use the merchant's own accounts. Shopify, WooCommerce, BigCommerce, Square, Miva, eBay, CSV. Shopify is a custom app requiring Advanced, Plus, or Grow. There is no public Shopify App Store listing. Persistive is a self-funded company in St. Louis, founded 2022.
