We’ve been using Katana for a while, but I feel like it’s not the right fit for us anymore. It’s solid in some areas, but either it’s getting too complex for what we need or it doesn’t fully support the way we sell across channels.
We’re on Shopify and a couple of other marketplaces, and I’m looking for something that can handle multichannel and multiple shopify store inventory sync, purchase orders and replenishment planning ideally in one place without feeling like a heavy ERP.
Hey! Brightpearl by Sage would be a great fit for what you need. The platform will be the central source of truth for all things inventory across multiple sales channels. Feel free to get in touch if it sounds like a good fit!
@woysanstore Quick question: are you primarily looking for operational inventory control (POs, syncing, etc.) or more forward visibility into what to reorder and when?
We’ve built DemandMind – Sales Forecasts, which focuses specifically on the planning side (SKU-level demand forecasting, stock action alerts, dead-stock detection). It doesn’t replace your core inventory system but instead helps merchants avoid overstock and stockouts earlier through operational and seasonal forecasts.
If forward planning is part of the gap you’re trying to solve, happy to help or share what we’re seeing work with similar stores. DemandMind is available in the Shopify App Store if you’d like to explore.
Sumtracker would be a great fir for your use cases. You can get all these features and various other features as well that too without the complexity of an ERP and at just $49/month. If you are switching from Katana, you can contact our support team, and they will ensure a smooth transition.
Katana is a good product for manufacturing-adjacent workflows, but if you’re not doing actual production/BOM management, it’s overkill. That friction compounds over time, and it sounds like you’ve hit the wall with it.
Prediko (~$59-119/mo) is probably your best bet if you’re primarily on Shopify. Native integration, solid PO workflow, demand-based replenishment that actually forecasts instead of just pinging you when stock is low. Multi-store works at higher tiers. Where it falls short is anything beyond Shopify – Amazon, eBay, Walmart sync is limited.
If overselling across channels is the main fire you’re putting out, Stock Sync plus Shopify’s native POs (~$20-40/mo combined) gets the job done. You’d handle replenishment triggers manually or with a spreadsheet. Not glamorous. Works fine if your catalog isn’t huge.
Linnworks and Brightpearl are the “complete” answers, but at $449+/mo with onboarding that feels like an ERP implementation, they’re probably exactly what you’re trying to get away from.
Honestly, the $40-120/mo range for multi-channel sync with intelligent replenishment is pretty bare right now. Most tools nail one or two of those pieces but not all three at SMB pricing. That’s been shifting fast since Stocky got sunset, so it’s worth rechecking every few months.
What’s your SKU count, and which channels are you on beyond Shopify? That matters more than anything else here.
Curious what you’re looking for specifically in a PO app?
With Stocky going away, and our own users asking us for a robust way to handle POs and light inventory management / reordering with Shopify; we decided to build our own solution, but for free.
Check it out at Stockroom - Stockroom ‑ Purchase Orders - Unlimited purchase orders, receiving & sync with QuickBooks | Shopify App Store - we’re making it completely free for everyone. We think Shopify merchants deserve a robust, stable and long term way to handle Purchase Orders (and the re-ordering/receiving processes that come with them) in a way that fits their business.
Hello, @woysanstore
Hope this message finds you in good spirits.
You might want to check out Sumtracker Inventory & Bundles. t supports inventory sync across multiple Shopify stores, purchase orders, and inventory management without feeling like a full ERP
Go and check here : Sumtracker Inventory Manager - Inventory sync & Inventory replenishment for multiple stores | Shopify App Store
Lots of good app suggestions here already, been researching this space myself lately, so I’ll add the evaluation side instead. Part of why this search is hard: “complete inventory management” is really two different problems. Multi-store sync has to be event-driven (react to every order in real time), while replenishment planning is batch analysis over history. Most apps are built around one and retrofit the other.
Three things I’d check in any demo before committing:
Is the sync webhook-driven or polling? If it polls every 5–15 min, your other channels are blind in that window – which is exactly when oversells happen on a busy day.
Real per-location support, or just one aggregate number?
What happens on a refund or a cancelled order – does stock actually come back automatically?
The answers to those three will tell you more than the feature comparison pages.
Hi @woysanstore 
If your biggest pain point is keeping inventory synchronized across multiple Shopify stores without moving to a full ERP, you might want to take a look at Easify Inventory Sync 
The app focuses specifically on inventory synchronization, making it a good fit if you already have your sales channels set up but need a simpler way to keep stock accurate.
With Inventory Groups, you can link products that represent the same physical inventory across multiple Shopify stores. Once they’re connected, any sale or manual inventory adjustment in one store is automatically reflected in the others in real time, helping prevent overselling and eliminating the need for manual stock updates.
I like this approach because it stays focused on solving the inventory sync problem without adding the complexity of a full ERP system. If inventory synchronization is the main reason you’re looking to move away from Katana, it could be a solution worth considering.
That said, if purchase orders and replenishment planning are also essential parts of your workflow, you may still want to pair Easify Inventory Sync with a dedicated purchasing or inventory planning solution, depending on how advanced your requirements are.
Hope this helps, and if you have any questions about how Inventory Groups work, Easify’s support team is always happy to help
Not a fit for multi-store/marketplace sync specifically (that’s a different problem than what I’ve focused on), but on the “complete inventory management combines two different needs” point someone raised — that’s exactly right, and worth keeping separate in your evaluation. Event-driven sync (Stock Sync, Easify) and batch replenishment forecasting (Prediko, DemandMind) are genuinely different engineering problems, and a lot of “complete” tools are actually just bolting one onto the other. Might be worth picking the best tool for each rather than one that claims both.