Custom ERP Development
A GST-ready ERP built around how your business actually runs.
Start from Business OS, a 28-module ERP, and extend it to your process, or build custom where your workflow is unique. One-time rupee pricing, no per-user fees.
- GST and e-invoicing
- Ready-made or custom
- No per-user fees
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What is custom ERP development?
Custom ERP development builds or tailors enterprise resource planning software, covering sales, purchase, stock, accounts and payroll, to a company's own processes. Stack18 offers Business OS, a GST-ready ERP with 28 modules from ₹2.8L one-time, and custom builds for workflows a ready-made system does not cover.
You need this when…
Tap the ones that apply to you.
Custom ERP Development, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Sales and purchase
Orders to invoices and vendor bills in one flow.
- Q
- u
- o
- t
- e
- s
- ,
- o
- r
- d
- e
- r
- s
- ,
- G
- S
- T
- i
- n
- v
- o
- i
- c
- e
- s
- |
- P
- u
- r
- c
- h
- a
- s
- e
- a
- n
- d
- a
- p
- p
- r
- o
- v
- a
- l
- s
- |
- C
- r
- e
- d
- i
- t
- n
- o
- t
- e
- s
- a
- n
- d
- r
- e
- t
- u
- r
- n
- s
Inventory and production
Live stock and work orders.
- M
- u
- l
- t
- i
- -
- l
- o
- c
- a
- t
- i
- o
- n
- s
- t
- o
- c
- k
- |
- B
- O
- M
- a
- n
- d
- w
- o
- r
- k
- o
- r
- d
- e
- r
- s
- |
- R
- e
- o
- r
- d
- e
- r
- a
- l
- e
- r
- t
- s
Accounts and GST
Books that match operations.
- G
- S
- T
- a
- n
- d
- e
- -
- i
- n
- v
- o
- i
- c
- i
- n
- g
- |
- R
- e
- c
- e
- i
- v
- a
- b
- l
- e
- s
- a
- n
- d
- p
- a
- y
- a
- b
- l
- e
- s
- |
- B
- a
- n
- k
- r
- e
- c
- o
- n
- c
- i
- l
- i
- a
- t
- i
- o
- n
People and payroll
HR processes in the same system.
- A
- t
- t
- e
- n
- d
- a
- n
- c
- e
- a
- n
- d
- l
- e
- a
- v
- e
- |
- P
- a
- y
- r
- o
- l
- l
- |
- E
- m
- p
- l
- o
- y
- e
- e
- r
- e
- c
- o
- r
- d
- s
Custom workflows
Where your process is unique.
- A
- p
- p
- r
- o
- v
- a
- l
- s
- a
- n
- d
- r
- u
- l
- e
- s
- |
- C
- u
- s
- t
- o
- m
- s
- c
- r
- e
- e
- n
- s
- a
- n
- d
- r
- e
- p
- o
- r
- t
- s
- |
- A
- P
- I
- i
- n
- t
- e
- g
- r
- a
- t
- i
- o
- n
- s
Migration and training
Move off old tools safely.
- D
- a
- t
- a
- m
- i
- g
- r
- a
- t
- i
- o
- n
- r
- u
- n
- s
- |
- R
- o
- l
- e
- -
- b
- a
- s
- e
- d
- t
- r
- a
- i
- n
- i
- n
- g
- |
- H
- y
- p
- e
- r
- c
- a
- r
- e
A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discover
Map the current process, data and priorities.
Design
Agree modules, integrations and rules.
Build
Configure and extend in weekly demos.
Launch
Data migration, training and go-live support.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Discovery Sprint
Teams deciding what to build first.
- Duration
- 1–4 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Business OS Launch
Teams that want to go live fast.
- Duration
- 3–4 weeks
- Pricing
- From ₹2.8L, one-time
- 9 pre-built modules
- Data migration
- Training and support
Custom ERP build
Needs that a ready-made system does not cover.
- Duration
- 4–16 weeks
- Pricing
- Fixed price per phase
- Weekly working demos
- Senior team accountable
- 30 days hypercare
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
Ethnic wear D2C, Jaipur
- Challenge
- A ₹100+ crore brand needed website, app and back office to share one catalogue and one record of stock and orders.
- What we do
- Nine specialists built website, mobile app and ERP on one connected foundation in two-week sprints.
3 months
Read the case study →Distribution business
- Challenge
- Orders, purchase and accounts in separate tools.
- What we do
- Business OS modules with approvals and one record.
6–8 weeks
Manufacturer
- Challenge
- Costing at month end, not per batch.
- What we do
- Production and costing modules on one ERP.
8–12 weeks
Free ERP fit review
Describe your process and current tools. We tell you what fits ready-made and what needs custom work.
- Fit view
- Cost band
- Indicative timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
Custom ERP Development questions.
Ready-made or custom ERP?
Both. Business OS is the ready base and custom modules are added where your workflow needs them. See our build vs buy guide.
What does it cost?
Business OS: Launch ₹2.8L, Grow ₹5.7L, Scale ₹9.95L, one-time, excluding GST. Individual modules start from ₹20,000.
Are there per-user fees?
No.
How long to go live?
Launch 3–4 weeks, Grow 6–8, Scale 10–12.
Can you migrate from Tally?
Yes, data migration runs are validated and reconciled before go-live.
Are you based in India?
Yes, in Jaipur, Rajasthan.
Let's scope your Custom ERP Development project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request