Shopify's admin and Sidekick cover the basics. Posto adds what they leave to you: supplier rules in every order, purchase orders emailed for you, landed cost per unit, and a forecast that checks every product every day.
Compare Posto and Shopify's purchase ordersStart 30 days freeShopify's admin can create and receive purchase orders, and Sidekick can suggest what to reorder when you ask. For a few products and one or two suppliers, that may be all you need.
Shopify's own guide lists the gaps: you can't email a purchase order from the admin, cost per item stays fixed when you receive stock, and supplier lead times, minimums, and case packs aren't used in purchase order calculations.
From Shopify's help center, checked October 3, 2026.
Posto runs inside your Shopify admin and starts forecasting from your sales right away. There's nothing to export first.
Give each supplier a lead time, minimum, and case pack, one at a time or from a spreadsheet. This is what makes the recommendations fit your real ordering, and once 3 orders from a supplier have arrived, Posto measures their real lead time for you.
Posto keeps its own purchase orders and doesn't read Shopify's. Finish any open Shopify orders there, and place new ones in Posto, so nothing is tracked twice.
Keep using Sidekick for questions while Posto watches your stock. Compare its recommendations with what you'd have ordered, then decide.
Yes. Sidekick is great for questions about your store. Just keep purchase orders in one place, so the same order isn't tracked twice.
No. Posto keeps its own purchase orders and doesn't read Shopify's. You can import past orders from a spreadsheet if you'd like a record of them in Posto.
Only when you record stock received: it updates inventory counts and, if you turn it on, the cost per item.
For a few products and one supplier, Shopify's tools may be enough, and Posto's free plan covers that size too. Posto earns its place when you have several suppliers with their own rules and want orders right without checking every product yourself. Paid plans are $19 or $39 a month, priced by suppliers, with no contract.
Install Posto, bring your suppliers and costs over, and send your first purchase order. 30 days free, everything unlocked, no payment details.
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