Custom integrations for workflows the marketplace doesn't cover.
Custom BigCommerce apps and third-party connections for the integrations that don't exist on the shelf — ERP sync, tax automation, shipping logic, and AI-powered workflows built production-grade and maintained in-house.
ERP & Inventory Sync
Bidirectional sync between BigCommerce and NetSuite, SAP, Acumatica, and custom ERP systems. Price lists, inventory, orders, customer records — real-time and scheduled, idempotent and audited.
- NetSuite
- SAP
- Acumatica
- Custom ERP
Avalara CertCapture
The connector layer behind automated tax exemption: a CertCapture and AvaTax integration with HMAC-verified webhooks, Redis caching, and a full audit log, wired into the BigCommerce customer account. Running in production for a national B2B distributor.
- Avalara
- CertCapture
- AvaTax
- HMAC · JWT
LTL Freight & Shipping Logic
Real-time LTL freight quoting from FedEx Freight, R+L, SAIA, and XPO — inline on the BigCommerce checkout. Custom shipping rules, carrier selection, and dimensional-weight logic.
- FedEx Freight
- R+L Carriers
- SAIA
- ShipperHQ
Search & Merchandising
Searchspring, Klevu, and Searchanise integrations — faceted search, boosting rules, merchandising pins, and AI-powered recommendations wired into your BC storefront.
- Searchspring
- Klevu
- Faceted search
- Recommendations
PIM & Product Data
Akeneo, Salsify, and custom PIM integrations that push structured product data into BigCommerce — bulk descriptions, attributes, media, and channel-specific variants without manual CSV workflows.
- Akeneo
- Salsify
- Custom PIM
- Bulk import
Custom builds when the marketplace comes up short
If the BC App Marketplace doesn't have it, we build it. Custom webhook consumers, API middleware, AI-driven automation layers, and internal tooling that integrates BigCommerce with any third-party system.
- Custom apps
- Middleware
- AI workflows
- Internal tools
Frequently asked questions
How long does a typical custom integration take?
Simple API connections (read/write to a single endpoint) scope to 1–2 weeks. Full bidirectional ERP sync with retry queues, caching, and audit logging is typically 4–6 weeks. We share a fixed scope before starting.
Do you maintain integrations after they launch?
Yes. API integrations require ongoing maintenance as BigCommerce, your ERP, and third-party APIs version. All our integrations include a care plan option with SLA-backed response times.
Can you connect BigCommerce to a custom or legacy ERP system?
Yes. If the system has any form of API, file export, or database access, we can build a sync layer. We have connected BC to systems ranging from NetSuite to bespoke Access databases.
What makes your Avalara integration different from the official BC app?
The official Avalara app handles AvaTax calculations. Our custom Avalara Tax Manager adds the missing piece: self-serve certificate upload, storage, auto-approval, and customer tax-class tagging — the B2B workflow that the off-the-shelf app doesn't cover.
Get a free technical audit of your BigCommerce store.
A real assessment from an engineer, delivered in 1 business day:
- One-page snapshot: BigCommerce health, performance, and UX flags
- AI-readiness / GEO score: how visible you are to ChatGPT, Perplexity, and AI Overviews
- Your 3 highest-leverage fixes, prioritized by revenue impact
Prefer to talk first? Call directly: 877.696.3475
Custom ecommerce engineering, AI apps, and SEO — typically 60–80% less than traditional agency pricing.
20+ years of BigCommerce engineering, now AI-augmented. Tell us your store, your stack, and your deadline — we quote fixed scope on the first call.