Billstack vs Kaizntree Inventory Management
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Billstack, Feb 19, 2026 for Kaizntree Inventory Management.
The short answer
- Billstack lists 16 features Kaizntree Inventory Management’s listing doesn’t mention, including Accounts payable, Accounts receivable, Barcodes.
Head to head
Stop Fragmenting Your Business: Sales channels, Inventory, CRM
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · $0.10 per extra order
- · 50 orders/month included
- · All features in all plans included
- · GoBD & ZUGFeRD invoices
- · Stock sync & tracking push
Starter
- · $0.06 per extra order
- · 500 orders/month included
- · All features in all plans included
- · GoBD & ZUGFeRD invoices
- · Stock sync & tracking push
Growth
- · $0.04 per extra order
- · 1,500 orders/month included
- · All features in all plans included
- · GoBD & ZUGFeRD invoices
- · Stock sync & tracking push
Business
- · $0.034 per extra order
- · 5,000 orders/month included
- · All features in all plans included
- · GoBD & ZUGFeRD invoices
- · Stock sync & tracking push
Enterprise
- · $0.03 per extra order
- · 10,000 orders/month included
- · All features in all plans included
- · GoBD & ZUGFeRD invoices
- · Stock sync & tracking push
Prime
- · $0.022 per extra order
- · 20,000 orders/month included
- · All features in all plans included
- · GoBD & ZUGFeRD invoices
- · Stock sync & tracking push
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureBillstack is an ERP and invoicing platform for merchants in Germany and the EU. Connect your Shopify store in one click — no technical setup. Orders import in real time including customer and shipping details, and Billstack creates legally compliant invoices (ZUGFeRD, GoBD) automatically. Your catalog and stock stay in sync across all channels, and tracking numbers are pushed back to Shopify.
Manage your entire operations from purchasing raw materials to recording production and selling finished products in one place while we keep your integrated sales channels, accounting software, 3PL and WMS in sync. All customers have direct access to our team for support and we'll work with you to account for nuances in your business.
- Real-time order import via webhooks, incl. addresses and payment status
- Automatic, legally compliant invoices (ZUGFeRD e-invoicing, GoBD)
- Product catalog import and continuous stock sync (Billstack as stock master)
- Tracking numbers pushed back to Shopify automatically
- Shopify Stock Synch: Stock is Automatically Updated on Shopify
- Record Bundles
- Record Production
- Integrates with: Shopify, Square, Xero, Etsy and Faire
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Billstack |  Kaizntree Inventory Management |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Billstack | Kaizntree Inventory Management |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 5 |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Billstack | Kaizntree Inventory Management |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $29/month | No monthly plan listed |
| Longest free trial | 14 days | Not listed |
| Plans listed | 6 | Not published |
Listing
| Measure | Billstack | Kaizntree Inventory Management |
|---|---|---|
| Shopify category rank | #83 | #81(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 16, 2026 | Aug 17, 2021 |
| Languages | 2 | 1 |
| Developer | MvB Commerce GmbH | Kaizntree |
FAQ
Billstack and Kaizntree Inventory Management: common questions
- What features does each app list that the other doesn’t?
- Billstack lists 16 the others don’t mention, such as Accounts payable, Accounts receivable, Barcodes, Cash flow. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 13, 2026 for Billstack, Feb 19, 2026 for Kaizntree Inventory Management; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 13, 2026 for Billstack, Feb 19, 2026 for Kaizntree Inventory Management. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.