New York · Houston · Dallas · Chicago
ERP & CRM Software Development in the USA
US companies usually look at custom ERP when per-seat licences on a packaged system have become the biggest line in the software budget, or when their process does not fit it. The system we build keeps QuickBooks or NetSuite as the ledger and replaces the spreadsheets around it.
We deliver custom ERP systems, bespoke CRM software and CRM implementation for companies in New York, Houston, Dallas and Chicago — remotely from our Karachi office, in your working hours, at a fixed written price.
Short answer
A2Z Global builds custom ERP and CRM systems for US businesses — inventory, orders, purchasing and customer management built around your workflow and integrated with QuickBooks, Xero or NetSuite, with multi-state sales tax handled through Avalara or TaxJar. The work is done by an offshore team in Karachi, with fixed quotes and phased delivery.
Key takeaways
- The order modules are built in matters more than which modules you choose.
- Clean master data — customers, products, suppliers — is the foundation every module depends on.
- Invoicing has to be designed for the country's tax and e-invoicing rules from the start, not adapted later.
- Delivery is phased: one module in daily use before the next begins.
/Building for USA
What an ERP for the USA has to handle
The details that make erp & crm systems for the USA different from anywhere else — and that we plan for before the first screen is designed.
| What changes | In the USA |
|---|---|
| Tax | Sales tax is set by each state, and many local jurisdictions add their own, so online sellers usually calculate it through a service such as Avalara or TaxJar rather than hard-coding rates. |
| E-invoicing | There is no federal e-invoicing mandate for private businesses in the US. Invoicing is driven by your accounting system and your customers' requirements. |
| Accounting software we integrate | QuickBooks, Xero, NetSuite |
| Language | English. Spanish interfaces where your customers need them. |
| Data and privacy | There is no single federal privacy law. State laws apply — California's CCPA/CPRA is the best known — alongside sector rules such as HIPAA for health data. Website accessibility is also a real legal exposure: businesses are sued under the ADA over inaccessible sites, so we build to WCAG. |
| Pricing | Priced per project. You get one fixed written quote after a discovery call. |
/How we work with you
Working with a team outside the USA
Delivered by the A2Z team from our Karachi office. You get a named point of contact, calls on WhatsApp, Zoom or Teams, a written scope before work starts, and a working link you can open while we build.
Pakistan is 9 to 10 hours ahead of US Eastern time, so we overlap with your morning for calls and build while you sleep — you wake up to progress rather than waiting on it.
/Included
What you get
- Custom ERP/CRM modules
- Role-based portals & dashboards
- Third-party integrations (accounting, email, logistics)
- Data migration & training
/Guides
Read before you hire: erp & crm systems
- ERP & SystemsOdoo Standard vs Custom: When to Stay Standard, When to Customise Odoo, and When to Build InsteadWhat standard Odoo actually includes, the four levels of customisation from configuration to custom modules, what each level costs at every upgrade, and a simple way to decide how far to go before a custom build makes more sense.Read
- Custom SoftwareHow to Write a Software Requirements Document Before You Hire a DeveloperWhat to put in a software requirements document so developers can quote accurately: goals, users, current process, data, integrations, reports and limits, with a section-by-section template.Read
- Custom SoftwareFixed Price vs Time and Materials: Which Contract Suits Your Software Project?How fixed-price and time-and-materials software contracts work, who carries the risk in each, when each one fits, and the milestone-based middle ground most business systems end up using.Read
/Work
Projects for the USA
/FAQ
ERP & CRM Systems in USA: common questions
Will it replace QuickBooks or NetSuite?
Usually not — it integrates with them. The operational system handles orders, stock and customers; the accounting package stays the ledger your accountant files from.
Can it handle sales tax across states?
Yes, through a sales tax service such as Avalara or TaxJar rather than hard-coded rates, since rates vary by state and locality.
Is custom ERP cheaper than per-seat software?
Often over a few years, once the team grows. It is more expensive upfront, so we compare the two over three years during discovery rather than assuming.