NNT Mart · the United States
E-commerce website and mobile app development in the United States
Turn what you sell into a complete online store, B2B portal, marketplace or shopping app built for the United States. Checkout with Visa, Mastercard, Amex and Discover, PayPal and Venmo and Apple Pay and Google Pay, delivery through USPS and UPS and sales-tax-ready invoicing — designed and developed to your requirements by N&T Software.
- Web platform + Android/iOS app
- Visa, Mastercard, Amex and Discover and PayPal and Venmo
- Delivery via USPS
- Demo within 24 hours
Quick answer
Who builds e-commerce websites and apps in the United States?
NNT Mart by N&T Software builds custom online stores, B2B portals, marketplaces and shopping apps for businesses in the United States. Platforms support Visa, Mastercard, Amex and Discover, PayPal and Venmo and Apple Pay and Google Pay, ship through USPS and UPS, follow state privacy laws led by the California CCPA/CPRA (with similar laws in Virginia, and come with a free demo within 24 hours of the requirements meeting.
The United States market
What an online store in the United States needs
The United States is the world's most valuable e-commerce market outside China, and shoppers expect fast, free shipping, easy returns and wallet checkout. Direct-to-consumer brands that own their store and data, rather than relying only on marketplaces, keep more margin and customer loyalty.
- Local payments
- Visa, Mastercard, Amex and Discover, PayPal and Venmo, Apple Pay and Google Pay and Shop Pay
- Delivery
- USPS, UPS and FedEx
- Tax on online sales
- There is no federal VAT; 45 states and D.C. levy sales tax with local add-ons, and since South Dakota v. Wayfair (2018) remote sellers must collect tax once they pass each state's economic-nexus threshold.
- Customer data law
- State privacy laws led by the California CCPA/CPRA (with similar laws in Virginia, Colorado, Texas and others), the FTC Act, COPPA for children and CAN-SPAM for email
- Currency
- US dollar (USD)
- Working with our team
- 9h 30m behind India (IST)
Strong online demand in the United States: electronics, apparel and footwear, health and personal care, home and furniture, groceries and pet supplies. Local brands also sell on Amazon, Walmart Marketplace and eBay, and we connect your own store to those channels.
Solutions
E-commerce solutions for businesses in the United States
Choose the solution closest to your business model. Each opens the full local page with payment, delivery and compliance details.
Online Store Builder in United States
Launch a branded, mobile-responsive online store with products, payments, orders, customers, shipping and reporting.
Explore online store in United States →
B2B & Wholesale Commerce in United States
Support approved business accounts, account pricing, bulk ordering, purchase orders and credit workflows.
Explore B2B ordering portal in United States →
Manufacturer & Distributor Portal in United States
Present technical catalogues, capture quotations and enable controlled dealer or distributor ordering.
Explore manufacturer and dealer portal in United States →
Multi-Vendor Marketplace in United States
Create an optional custom marketplace with vendor onboarding, catalogue control, commissions and order governance.
Explore multi-vendor marketplace in United States →
Service Booking Commerce in United States
Sell appointments, consultations, maintenance packages, classes and resource-based services.
Explore service booking platform in United States →
Subscription & Membership Commerce in United States
Manage recurring plans, memberships, renewals, entitlements and scheduled deliveries.
Explore subscription commerce platform in United States →
Mobile Commerce Applications in United States
Extend your store through customer, dealer, delivery or administration mobile applications.
Explore shopping app in United States →
Custom E-Commerce Development in United States
Build tailored workflows, portals and integrations for complex enterprise requirements.
Explore custom e-commerce platform in United States →
International & Multi-Region Commerce in United States
Prepare selected markets with regional content, currencies, payment providers and fulfilment rules.
Explore international e-commerce platform in United States →
Cities
We build for 246 cities in the United States
Choose your city for local payment, delivery and compliance details.
California
Connecticut
Delaware
Washington, D.C.
Florida
Massachusetts
Mississippi
Nebraska
New Hampshire
New Mexico
North Dakota
Pennsylvania
Rhode Island
South Carolina
South Dakota
Texas
Vermont
West Virginia
E-commerce development in the United States — FAQs
Which payment methods can my online store in the United States accept?
Stores we build for the United States support Visa, Mastercard, Amex and Discover, PayPal and Venmo, Apple Pay and Google Pay, Shop Pay, Affirm, Klarna and Afterpay BNPL and ACH bank payments, plus international cards where your payment provider allows them. Providers are chosen by merchant eligibility, currency (US dollar) and settlement needs.
How is delivery handled for a store in the United States?
We connect USPS, UPS, FedEx, DHL eCommerce, Amazon Shipping and OnTrac or your own delivery team, with rate, tracking and return workflows set to your service area.
What tax and data rules apply to an online store in the United States?
Online sales in the United States fall under There is no federal VAT; 45 states and D.C. levy sales tax with local add-ons, and since South Dakota v. Wayfair (2018) remote sellers must collect tax once they pass each state's economic-nexus threshold.. Customer data is governed by state privacy laws led by the California CCPA/CPRA (with similar laws in Virginia, Colorado, Texas and others), the FTC Act, COPPA for children and CAN-SPAM for email, and consumer rules are covered by FTC rules including the Mail, Internet or Telephone Order Merchandise Rule, the 2024 rule against fake reviews, the ADA expectations on website accessibility and state "click-to-cancel" subscription laws. We build invoicing, consent and records around them.
Can you build both the website and the mobile app for the United States?
Yes. We design and build the e-commerce platform and its Android and iOS apps on one shared backend, to your requirements.
How quickly will I hear back from NNT Mart?
Within 10 minutes, any day, by email, phone or WhatsApp. We hold a requirements meeting and share a working demo within 24 hours of it. Our team in India works 9h 30m behind India (IST).
Free demo in 24 hours
Tell us about your business in United States
A few lines are enough. We reply within 10 minutes, meet to understand your requirements and show you a working demo within 24 hours.
Tell us what you sell. We will show you a working demo in 24 hours.
Free requirements meeting, a demo built on your use case and a proposal priced to your budget — with no obligation.