What Katana MRP is built for
Katana is a cloud MRP tool designed for small product businesses — makers, brand owners, and light manufacturers who sell through direct-to-consumer channels. Its native Shopify integration is its strongest differentiator: when a Shopify order comes in, Katana creates a manufacturing order, checks component availability, and updates inventory in real time. For this use case, it is genuinely good.
The typical Katana user makes a product with a stable BOM, sells it online or wholesale, and needs basic production planning, inventory control, and purchase order management. Setup takes 1–2 weeks. The UI is clean and the learning curve is low.
Where Katana works for Singapore manufacturers
If you are a Singapore manufacturer who sells packaged consumer products through an online store or retail channels, Katana covers most of your operational surface. Inventory management is solid. Purchase orders are tracked. The BOM structure handles straightforward assemblies. Xero integration keeps your accounting in sync.
For a 5–20 person team making a consistent product range with a stable BOM, Katana at S$240–S$400/month is a reasonable choice with no implementation partner required.
Where Katana falls short for Singapore manufacturers
Job shop manufacturing: Katana is not designed for make-to-order job shops. If every production run is different — different specs, different customer requirements, different subcon operations — Katana does not have the job-level routing, cost tracking, and close-out report that a job shop needs.
Subcon job management: Katana tracks purchase orders to suppliers but does not model the send-and-receive cycle for subcon operations (heat treatment, plating, surface finishing) at the job level. Manufacturers who use frequent subcon work end up tracking this in spreadsheets alongside Katana.
InvoiceNow: Katana does not natively generate PEPPOL-compliant e-invoices. For Singapore manufacturers who receive InvoiceNow requests from government-linked companies or large corporate customers, this is a material gap. Workarounds require a third-party connector or switching to an InvoiceNow-enabled accounting tool.
Job costing: Katana can show material cost per production run, but actual vs estimated comparison at the job level — including machine time and subcon — is not a built-in feature. For manufacturers who need closed-loop job costing to improve quoting over time, this is a significant gap.
5-year total cost comparison
At the Professional plan (US$799/month, ~S$1,080/month), Katana costs S$65,000 over five years — before any integration development for InvoiceNow, before any customisation for your workflow gaps, and with perpetual per-seat fees for additional users. A focused custom ERP covering the same functional scope costs S$40,000–S$80,000 one-time with no ongoing platform fee.
For manufacturers at the Essential or Advanced tier (S$240–S$540/month), the five-year platform cost is S$14,000–S$32,000 — competitive with a custom build for simple use cases. The decision depends on whether Katana covers your actual workflow or whether you are compensating with Excel in parallel.
The decision signal
If you are running Katana and still have a spreadsheet for quoting, job tracking, or subcon — that parallel workload is the signal. You are paying for a system that does not cover your actual operational surface. The manufacturing ERP requirements template on this site will help you document exactly what your system needs to handle before choosing between Katana, another SaaS tool, or a custom build.