Claude vs ChatGPT for developers: lessons from real ERP builds
Claude or ChatGPT? A working developer's comparison, including how we built X3 Retail ERP with parallel Claude Code agents that learn from their own mistakes.
Read articleCustom ERP development shaped around how your business actually runs: inventory, accounting, roles, approvals and reporting, from hospitals to housing schemes.
A trust eye hospital in Chishtian had software from a well-known vendor who would neither update it nor fix it. Charity patients, trustee funds and cheques lived in registers instead. The owner lives in the UK and had a month before flying back. We built a complete desktop ERP in six weeks, moved the running data and the staff across on site, and the hospital did not close for a single day. Years later it asked for the web version, and EHMS went live in three months. A second hospital ordered it after seeing it run.
A housing developer needed something else entirely. In Turner 10, a single plot sale can involve a freelancer, a sales officer and an investor's agent, each paid differently, so the system has five kinds of agent instead of one. Installments run for years, so recovery has its own screen with every phone call logged.
And in a jewellery business, stock is not a number on a shelf. In Ophir every piece carries its weight and karat from purchase, through the karigar and back, to a sale priced at that day's gold rate.
Zakat ledgers, five kinds of sales agent, karat-aware stock: none of it is exotic to the people who run these businesses, and none of it comes in a box. That gap is what custom ERP development is for.
An honest comparison. If your business runs the way most businesses in your industry do, an off-the-shelf ERP is often the better buy. Build custom when the rules that make you money don't fit.
| Custom ERP | Odoo or ERPNext | |
|---|---|---|
| Fits your workflow | Built around it from the first screen | You adapt to its modules, or pay to customise them |
| Cost to start | Higher | Lower, with licences, hosting and partner fees on top |
| Cost as you grow | No per-user licence fees | Per-user pricing on paid editions |
| Unusual rules | Handled as first-class features | Custom modules, usually from a partner |
| Support | The engineers who wrote it | An implementation partner |
The trust hospital behind EHMS looked at SAP and Odoo before choosing us. The written plan will tell you if an off-the-shelf ERP is the better fit for you.
Typical ranges from our cost estimator for ERPs we have built, with AI agents doing the repetitive work and senior engineers reviewing every change.
| System | Typical range | Timeline |
|---|---|---|
| Hospital Management System | $19,000 to $31,000 | 7 to 11 weeks |
| Real Estate ERP | $34,500 to $56,000 | 10 to 14 weeks |
| Jewellery ERP | $32,500 to $52,500 | 10 to 14 weeks |
| Order Management ERP | $15,000 to $24,000 | 7 to 9 weeks |
Each system has its own page in the cost estimator, where you can change modules and get a PDF estimate.
The same rhythm on every ERP, from hospitals to housing schemes.
Yes. We map the real workflow first (roles, approvals, stock movements, accounting) and model the data around it. Your team doesn't have to bend to a generic template.
It depends on the modules. Our estimator puts a real estate ERP at $34,500 to $56,000 and a hospital system at $19,000 to $31,000. The written plan gives the exact figure.
Use Odoo or ERPNext if your processes match how they work, because you will be live sooner and pay less up front. Build custom when your core rules (funds, commissions, pricing, stock units) don't fit, or when per-user licence fees and customisation costs will outgrow a one-time build.
Yes. At the trust hospital in Chishtian we moved the running data and the staff onto the new ERP in person, and the hospital did not close for a single day.
Yes. Turner 10 runs in English, Urdu and Arabic under role-based access, and Ophir handles multi-branch inventory control.
Answer three quick questions and we'll send a written plan covering scope, team, timeline and estimate.