Stack18 solution · ERP for growing businesses

Business OS

Run your whole business on one system.

A modern, GST-ready ERP for Indian SMEs that have outgrown Tally, Excel and WhatsApp.

Sales, purchase, inventory, accounts, payroll and service in one connected system, with a mobile dashboard that tells the owner where the business stands today. Bring your Tally history across, keep your workflows, and stop running the company from spreadsheets.

  • 28 modules
  • Editions from ₹2.8L
  • Launch edition: 3–4 weeks
1system instead of Tally, Excel and WhatsApp
3–12weeks to go live, by edition
5statutory deductions computed in payroll
₹0per-user licence fees
Quick answer

What is Business OS?

Business OS is a GST-ready ERP for Indian SMEs outgrowing Tally, Excel and WhatsApp, covering sales, production, people and operations in 28 modules. Editions are priced once in rupees: Launch ₹2.8L, Grow ₹5.7L and Scale ₹9.95L, excluding GST, with no per-user fees.

See it in action

See Business OS in action.

One connected backbone: a GST invoice that updates stock, accounts and the e-invoice status together.

Illustrative interface with sample data. Your screens are configured to your workflows.
Billing & E-invoicing

GST invoices with IRN and QR, credit and debit notes, and e-way bills.

Inventory & Godowns

Multi-godown stock with batches, expiry, serial numbers and reorder levels.

Accounting & GST

Ledgers, vouchers, bank, GST and TDS with GSTR-ready reports and an audit trail.

Sound familiar?

What slows business teams down today.

Numbers live in five places

Sales in Excel, stock in a register, accounts in Tally and approvals on WhatsApp. Nobody has today's picture.

Collections drift

Outstanding grows because reminders depend on someone remembering to call.

Stock is a guess

Without batches, godowns and reorder levels, you discover shortages when a customer is waiting.

Payroll takes a week

Attendance, leave, PF, ESI, PT and TDS are worked out by hand every month.

What changes

From workarounds to one connected system.

TodayQuotes made in Word, orders tracked in Excel
With Business OSQuote to order to invoice in three clicks
TodayStock counted at month end
With Business OSLive stock by godown, batch and expiry
TodayOutstanding chased by phone
With Business OSAutomatic WhatsApp reminders with UPI payment links
TodayPayroll calculated by hand
With Business OSAttendance-linked payroll with PF, ESI, PT and TDS
TodayOwner waits for the accountant
With Business OSA live mobile dashboard for sales, cash and stock
Editions

Three ways to start. Grow module by module.

Each edition is a tested bundle of modules at 10–20% below their combined price. Prices are one-time build and setup, in rupees, excluding GST.

Launch

3–4 weeks

Businesses moving off Tally and Excel.

₹2,80,000

₹3,10,000 Save ₹30,000 (10%) · 9 modules

Includes

  • ERP Core
  • Tally Migration & Sync
  • Owner's Dashboard

Grow

6–8 weeks

SMEs adding sales, collections and payroll.

₹5,70,000

₹6,70,000 Save ₹1,00,000 (15%) · 19 modules

Everything in Launch, plus

  • Leads & Pipeline CRM
  • Quotations & Proforma
  • Receivables & Reminders
  • HR & Employee Records
  • Attendance & Leave
  • Payroll (PF, ESI, PT, TDS)
  • Barcode & Stock Audit
  • and 3 more

Scale

10–12 weeks

Multi-branch businesses, manufacturers and distributors.

₹9,95,000

₹12,45,000 Save ₹2,50,000 (20%) · 28 modules

Everything in Grow, plus

  • Manufacturing & BOM
  • Job Work
  • Dealer & Distributor Portal
  • Field Sales App
  • Employee Self-service App
  • Service Desk & AMC
  • Projects & Tasks
  • and 2 more

Need a different mix? Pick individual modules and see your price instantly.

Module guide

Every Business OS module, explained.

28 modules in 6 groups. Tags show which editions include a module. Bigger modules include the smaller ones they contain, so nothing is charged twice, and required modules are added for you.

ERP core

7 modules

The connected backbone of the business.

ERP Core

₹2,20,000

Items and price lists, sales orders, purchase, inventory, accounting with GST, and billing with e-invoicing as one connected backbone.

IncludesItem & Price Master, Sales Orders & Dispatch, Purchase & Vendors, Inventory & Godowns, Accounting & GST, Billing & E-invoicing
LaunchGrowScale

Item & Price Master

₹20,000

Items, units, HSN codes, GST rates and customer-wise price lists in one place.

LaunchGrowScale

Sales Orders & Dispatch

₹40,000

Orders, delivery challans, partial dispatch and backorders, all linked to stock.

RequiresItem & Price Master
LaunchGrowScale

Purchase & Vendors

₹45,000

Purchase orders, GRN, vendor rates and pending deliveries, with three-way matching.

RequiresItem & Price Master
LaunchGrowScale

Inventory & Godowns

₹50,000

Multi-godown stock with batches, expiry, serial numbers and reorder levels.

RequiresItem & Price Master
LaunchGrowScale

Accounting & GST

₹70,000

Ledgers, vouchers, bank, GST and TDS with GSTR-ready reports and an audit trail.

LaunchGrowScale

Billing & E-invoicing

₹40,000

GST invoices with IRN and QR, credit and debit notes, and e-way bills.

RequiresAccounting & GST
LaunchGrowScale

Sales & customers

5 modules

Win more orders and get paid faster.

Leads & Pipeline CRM

₹50,000

Leads from IndiaMART, the website and calls, with follow-ups and a visual pipeline.

GrowScale

Quotations & Proforma

₹25,000

Branded quotes and proforma invoices that turn into orders in one click.

RequiresLeads & Pipeline CRM
GrowScale

Receivables & Reminders

₹35,000

Ageing, credit limits and automatic WhatsApp reminders with UPI payment links.

RequiresBilling & E-invoicing
GrowScale

Dealer & Distributor Portal

₹90,000

Your dealers place orders, see schemes, track dispatch and download invoices themselves.

RequiresSales Orders & Dispatch
Scale

Field Sales App

₹80,000

Beat plans, check-ins, order capture and collections for your field team, with GPS.

RequiresSales Orders & Dispatch
Scale

Production

3 modules

For businesses that make what they sell.

Manufacturing & BOM

₹1,10,000

Bills of materials, production orders, material issue, scrap and costing.

RequiresInventory & Godowns, Purchase & Vendors
Scale

Job Work

₹45,000

Material sent to and received from job workers, with ITC-04 ready records.

RequiresInventory & Godowns
Scale

Barcode & Stock Audit

₹30,000

Barcode labels, mobile scanning and cycle counts that keep the books honest.

RequiresInventory & Godowns
GrowScale

People

4 modules

Hire, pay and look after your team.

HR & Employee Records

₹35,000

Employee master, documents, onboarding checklists and letters.

GrowScale

Attendance & Leave

₹35,000

Mobile check-in with geo-fencing or biometric sync, shifts, leave and holidays.

RequiresHR & Employee Records
GrowScale

Payroll (PF, ESI, PT, TDS)

₹60,000

Attendance-linked payroll with PF, ESI, professional tax, TDS and payslips on WhatsApp.

RequiresHR & Employee Records, Attendance & Leave
GrowScale

Employee Self-service App

₹40,000

Payslips, leave, reimbursements and approvals on every employee's phone.

RequiresHR & Employee Records
Scale

Operations

6 modules

Keep work, service and approvals moving.

Projects & Tasks

₹40,000

Projects, milestones, timesheets and project-wise profitability.

Scale

Service Desk & AMC

₹55,000

Complaints, warranty and AMC contracts, technician visits and service billing.

Scale

Approvals & Documents

₹35,000

Configurable approval flows for purchases, expenses and discounts, with a document vault.

GrowScale

Expenses & Petty Cash

₹25,000

Claims with bill photos, approvals and petty cash by branch.

GrowScale

Asset Register

₹25,000

Company assets, allocation to staff, maintenance and depreciation.

Scale

Tally Migration & Sync

₹45,000

Masters, opening balances and history brought across from Tally, with ongoing sync if your CA prefers Tally.

LaunchGrowScale

Insight & AI

3 modules

Know where you stand, ask in plain language.

Owner's Dashboard

₹45,000

A mobile view of sales, collections, cash, stock and payables, updated live.

LaunchGrowScale

Reports & MIS

₹30,000

Custom reports and scheduled MIS sent to your inbox or WhatsApp.

GrowScale

AI Business Assistant

₹90,000

Ask questions like "which dealers are overdue above ₹1 lakh?" in English or Hindi and get answers from your data.

RequiresOwner's Dashboard
Scale
Configure

Start from an edition, or build your own.

Pick an edition to apply its price, then add or remove modules. Indicative one-time build and setup, excluding GST. Request a quote when you are ready.

India-ready

Connects to the tools Indian businesses run on.

Integrations are scoped with your quote. Third-party accounts stay in your name, and usage is billed by each provider.

Accounting

Tally PrimeZoho BooksBusy

Compliance

GST e-invoice (IRP)E-way billTDS returns

Banking & payments

Bank statementsUPI payment linksRazorpay

Lead sources

IndiaMARTJustDialWebsite forms

Messaging

WhatsApp Business APISMS (DLT)Email

Devices

Biometric attendanceBarcode printersThermal printers
Built for

Who runs on Business OS.

Traders & distributors

Price lists, credit limits, dealer orders and collections in one place.

Small manufacturers

BOM, production, job work and costing without an expensive ERP.

Service & AMC companies

Complaints, technician visits, AMC renewals and service billing.

Multi-branch SMEs

Branch-wise stock, sales and P&L with one owner view.

Best forTraders and distributorsSmall manufacturersService and AMC businessesMulti-branch SMEs
What you pay for

Clear pricing, with no per-seat fees.

You pay once to build and set up the modules you choose.

Included in every edition and module price

  • Deployment on your own cloud account or servers
  • Configuration of workflows, roles, approvals and templates
  • Standard data import from Excel, CSV or your current tool
  • Team training, live and recorded
  • 30 days of hypercare after go-live
  • Documentation handed over to you

Paid separately, at cost

  • Cloud hosting On your own AWS, Azure or Google Cloud account, typically a few thousand rupees a month to start.
  • Third-party usage Payment gateway, WhatsApp, SMS, telephony and AI model charges, paid directly to each provider at their rates.
  • Custom features Anything beyond a module's scope is estimated separately before work starts.

Optional Stack18 Care plan from 15% of build value per year: updates, security patches, priority support and small enhancements.

Go-live plan

Live in 3–4 weeks with Launch.

Grow typically takes 6–8 weeks and Scale 10–12 weeks, delivered in phases so your business keeps running.

01Week 1

Discover

We map your process, data and integrations, confirm the edition or module set, and fix a go-live date.

02Weeks 2–4

Configure

The solution is deployed on your cloud and configured to your workflows, roles, approvals and templates.

03Alongside

Integrate & migrate

We connect payments, GST, messaging and your existing tools, and bring your data across.

04Then

Go live & grow

Training, a supported launch and 30 days of hypercare. Add modules whenever you are ready.

FAQ

Business OS questions.

Talk to Stack18
We use Tally. Do we have to stop?

No. We migrate your masters and history into Business OS, and if your CA prefers Tally for filing, the Tally sync keeps both in step.

Is there a per-user fee?

No. You pay a one-time build and setup fee per module. Add as many users as you need.

Does payroll handle Indian statutory deductions?

Yes. PF, ESI, professional tax and TDS are computed from attendance and salary structures, with challan-ready reports.

Can it run on mobile?

Yes. The owner dashboard, approvals, attendance, field sales and employee self-service are designed for phones first.

How long does it take to go live?

The Launch edition typically goes live in 3–4 weeks. Larger editions run in phases so the business keeps running while each part comes online.

Where is our data stored?

On your own cloud account in India, or on your servers.

Related services

Services that pair with Business OS.

Need to extend it or replace what it will sit beside? We offer custom software development for tailored modules, legacy modernization to retire an ageing ERP, digital transformation to plan the change, and technology consulting to set the roadmap. See how we built an ERP alongside a website and app for a ₹100+ crore ethnic wear brand.

See Business OS running on your business.

Share how you work today. We will recommend an edition, show you a live demo and send a clear, fixed quote.

Book a demo →Configure and price