CS-Cart development services.
Ecarter is a full-service CS-Cart development company. We build, customise and scale CS-Cart stores and Multi-Vendor marketplaces — custom add-ons, themes, mobile apps, migrations and SLA-backed support — as an Authorized CS-Cart Reseller with 200+ projects behind us.
One team for everything CS-Cart.
CS-Cart is one of the most capable self-hosted e-commerce platforms on the market, and its Multi-Vendor edition powers thousands of online marketplaces worldwide. But getting the most out of it takes a team that works with the platform every day. That is what our CS-Cart development services deliver: senior developers who build custom add-ons, design fast themes, integrate payments and shipping, migrate stores from other platforms and keep marketplaces running at scale.
Unlike generalist agencies, CS-Cart is our home platform. We are an Authorized CS-Cart Reseller, we publish our own catalog of CS-Cart add-ons and mobile apps, and we have taken marketplaces from launch to 50,000 orders a day.
- CS-Cart & CS-Cart Multi-Vendor specialists
- Upgrade-safe custom add-on development
- Own catalog of 30+ production add-ons & apps
- SLA-backed support and maintenance
What is CS-Cart development?
CS-Cart development is the work of building, customising and maintaining e-commerce stores and multi-vendor marketplaces on the CS-Cart platform. It spans custom add-on development using the platform’s hook architecture, theme development with Smarty templating, payment and shipping integrations, ERP and CRM connections through the REST API, mobile apps, data migration from other platforms, and performance engineering for high-order-volume stores.
CS-Cart itself is a self-hosted e-commerce platform used by tens of thousands of stores worldwide. Unlike SaaS carts, you own the software and the data: a one-time license, full source-code access, and no per-transaction fees. Its Multi-Vendor edition is one of the most widely deployed marketplace platforms anywhere — vendor panels, commission engines and payout management come built in, which is why startups choose it over building a marketplace from scratch.
We work across the full CS-Cart product line — CS-Cart Store Builder for single-seller stores, Multi-Vendor, Multi-Vendor Plus and Multi-Vendor Ultimate for marketplaces — on current 4.x versions and upgrades from older releases. Under the hood that means PHP 8, MySQL/MariaDB, Smarty, JavaScript and the CS-Cart REST API, deployed on infrastructure we tune for Core Web Vitals and sale-day traffic.
CS-Cart solutions for every vertical.
200+ projects across 40+ countries — here is where CS-Cart, done right, wins.
Grocery & food delivery
Hyperlocal marketplaces with delivery slots, rider apps and live order tracking — our Delivery Boy app was built for exactly this.
Fashion & lifestyle
Multi-brand catalogs with size/colour variants, lookbook-style themes and vendor storefronts for boutique sellers.
Electronics & gadgets
Deep spec-driven catalogs, feature filters and comparison flows, with warranties and serial-number tracking built in.
B2B & wholesale
Customer-group price lists, quotation workflows, minimum order quantities and ERP-integrated ordering portals.
Services & bookings
Appointments, rentals and reservations sold alongside products, powered by our CS-Cart Booking System add-on.
Vertical marketplaces
Niche Multi-Vendor platforms — handicrafts, auto parts, pharma, digital goods — with custom vendor rules per niche.
CS-Cart development services we offer.
From a single custom add-on to a complete marketplace build — everything under one roof.
CS-Cart Multi-Vendor marketplace development
Complete marketplace builds on CS-Cart Multi-Vendor: vendor onboarding and KYC, commission engines, vendor plans, payout automation and unified order management for platforms with thousands of sellers.
CS-Cart add-on development
Bespoke, upgrade-safe CS-Cart add-ons built to platform coding standards — payment gateways, shipping methods, ERP and CRM connectors, wallets, subscriptions and anything your business model needs.
CS-Cart store development
Single-vendor CS-Cart stores customised to your brand, catalog and workflow — B2C, B2B price lists, quotations and multi-storefront setups included.
CS-Cart theme development
Custom CS-Cart themes that are mobile-first, Core Web Vitals-friendly and conversion-focused — designed in Figma, built responsive and tested across devices.
CS-Cart mobile app development
Native customer, vendor and delivery apps for CS-Cart with push notifications, real-time order sync and in-app payments — the same apps we sell as products, customised for your marketplace.
CS-Cart migration services
Move to CS-Cart from Magento, Shopify, WooCommerce, OpenCart or a custom platform. Products, customers, orders and SEO migrate with a full redirect map and data-integrity checks.
CS-Cart POS development
Point-of-sale for CS-Cart retailers: barcode billing, offline mode, real-time inventory sync between counters and your online store, and per-outlet reporting.
CS-Cart API & headless development
REST API integrations, middleware and headless storefronts on top of CS-Cart — connect ERPs, accounting systems, marketplaces and custom front ends.
CS-Cart speed & performance optimization
Database tuning, caching, image pipelines and server architecture for large catalogs, thousands of vendors and high-traffic sale events without downtime.
CS-Cart upgrade & maintenance
Version upgrades without losing customisations, security patches, monitoring and SLA-backed retainers with a dedicated point of contact.
30+ CS-Cart add-ons & apps, ready to install.
We do not just build for clients — we ship our own CS-Cart products, battle-tested across hundreds of stores.
Why choose Ecarter for CS-Cart development?
Few teams anywhere have shipped more CS-Cart marketplaces than we have.
Authorized CS-Cart Reseller
Official CS-Cart partner in India with direct licensing, priority platform support and early access to releases.
200+ projects delivered
Marketplaces, B2B stores and vertical platforms across 40+ countries — grocery, fashion, electronics, services and more.
Marketplace-grade engineering
Battle-tested at 50K orders/day with custom commission engines, payout automation and zero-downtime sale events.
Product-company DNA
Our own add-ons run in production on hundreds of stores — so the code we write for you is upgrade-safe and maintainable.
Transparent engagement
Fixed-scope projects or dedicated developers, clear monthly quotes, a named point of contact and weekly demos.
SLA-backed support
Post-launch retainers with guaranteed response times, proactive monitoring and security patching.
Our CS-Cart development process.
A predictable path from first call to a marketplace that scales.
1. Discovery & scoping
We map your business model — vendors, commissions, logistics, payments — and turn it into a concrete CS-Cart architecture and estimate.
2. UX & theme design
Conversion-focused designs in Figma for storefront, vendor panel and mobile, approved before a line of code is written.
3. Development
Add-ons, integrations and theme build in agile sprints with weekly demos — all upgrade-safe and to CS-Cart coding standards.
4. QA & performance
Functional, payment and load testing, plus Core Web Vitals and SEO checks before anything ships.
5. Launch & migration
Zero-drama go-live with data migration, redirect maps, DNS cutover and rollback plans handled for you.
6. Support & growth
SLA retainers, version upgrades, new features and e-commerce SEO to keep orders growing after launch.
Who our CS-Cart services are built for.
Startups launching a marketplace
Launch a Multi-Vendor marketplace fast on proven software instead of burning your runway on a custom build. We handle licensing, setup, branding and vendor onboarding.
Growing stores hitting limits
Outgrowing your current CS-Cart setup — or another platform entirely? We optimise, extend or migrate so performance and features keep pace with your sales.
Enterprises & B2B operators
Complex catalogs, price lists per customer group, quotation flows and ERP integrations — engineered on CS-Cart with the governance your team expects.
Agencies needing CS-Cart muscle
White-label CS-Cart development for agencies whose clients run on the platform — hire our developers full-time, part-time or hourly.
Trusted by marketplace operators.
“By far, the best team for CS-Cart development. I’ve tried 10+ companies — Ecarter is better than all of them combined. Fair price, surpasses expectations every time.”
Hélder Lima — Founder & CIO, Venddor
See the work
CS-Cart Vendor App · Bazzaar marketplace app · NextGlob app
Planning a build? Start with our guides: marketplace development cost · how to build a marketplace · all CS-Cart articles.
Every engagement includes a dedicated point of contact, and post-launch support runs on SLA-backed retainers.
CS-Cart development FAQ.
Answers to the questions we hear most from store and marketplace owners.
What does a CS-Cart development company do?
A CS-Cart development company designs, builds and maintains stores and marketplaces on the CS-Cart platform — custom add-ons, themes, payment and shipping integrations, mobile apps, migrations, performance tuning and ongoing support. Ecarter covers all of this as an Authorized CS-Cart Reseller.
How much does CS-Cart development cost?
It depends on scope. A ready-made add-on starts under $100, a customised store typically runs a few thousand dollars, and a full Multi-Vendor marketplace build is scoped per project. We quote fixed prices after a free discovery call, and dedicated developers are available at India-based monthly rates.
Are you an official CS-Cart partner?
Yes — Ecarter is an Authorized CS-Cart Reseller in India with 200+ CS-Cart and Multi-Vendor projects shipped over 5+ years, plus our own catalog of production add-ons and mobile apps.
Can you build custom add-ons for CS-Cart?
Yes — bespoke add-ons, payment and shipping integrations, commission engines, ERP connectors and more, all built to CS-Cart coding standards so they survive version upgrades.
Do you develop mobile apps for CS-Cart?
Yes. We build native customer, vendor and delivery apps for CS-Cart and Multi-Vendor — the same apps we sell as ready-made products, customised to your brand and workflow.
Can you migrate my store to CS-Cart?
Yes — we migrate products, customers, orders and SEO from Magento, Shopify, WooCommerce, OpenCart and custom platforms, with a full redirect map and data-integrity checks so rankings and history are preserved.
Can CS-Cart handle a large marketplace?
Absolutely. We have tuned CS-Cart Multi-Vendor platforms handling 50,000 orders a day and thousands of active vendors, with custom caching, database optimisation and load-tested infrastructure.
Is CS-Cart good for B2B e-commerce?
Yes — CS-Cart supports customer groups, per-group price lists, quotations, minimum order quantities and bulk ordering. We extend it further with custom B2B workflows and ERP integrations.
Do you provide CS-Cart support and maintenance?
Yes — SLA-backed retainers covering monitoring, security patches, version upgrades and feature development, with guaranteed response times and a dedicated point of contact.
Can I hire a dedicated CS-Cart developer?
Yes — you can hire our CS-Cart developers full-time, part-time or hourly with a clear monthly quote. See our hire CS-Cart developers page for details.
How long does a CS-Cart project take?
A single custom add-on typically ships in 1–3 weeks. A branded store build runs 4–8 weeks, and a full Multi-Vendor marketplace with custom apps usually launches in 8–16 weeks depending on scope. You get a concrete timeline with the fixed quote after discovery.
Which CS-Cart editions and versions do you work with?
All of them — CS-Cart Store Builder, Multi-Vendor, Multi-Vendor Plus and Multi-Vendor Ultimate, on current 4.x releases. We also upgrade stores stuck on older versions to the latest release without losing customisations or data.
Need CS-Cart development done right?
Talk to an Authorized CS-Cart partner. We will scope your project — add-on, store or full marketplace — and give you a clear, fixed quote.