ERP integration, which connector for NetSuite / SAP / Tally / Odoo?

The honest list of what works in 2026:

• NetSuite: direct integration via SuiteScript + REST API. Connectors: Patchworks (mid-market, $400, $800/mo), Celigo Integrator.io ($600, $1,200/mo), Folio3 NetSuite-Magento connector (one-time + support). Custom-built: $20, $40k for a clean implementation. Real-time stock + price; near-real-time order push.
• SAP (S/4HANA, Business One): IDoc-based (legacy) or OData (modern). Connectors: Pixafy SAP-Magento, Boltic SAP, Alumio. Custom: $30, $60k due to schema complexity. Batch sync (every 5-15 min) is the norm; real-time is achievable but pricey.
• Tally: XML-over-HTTP integration (Tally’s native pattern). Connectors: tdlexpert.com Tally-Magento bridge, custom modules from Indian dev shops ($3, $8k). Strong India-market choice; pairs with Razorpay for NEFT/IMPS payment.
• Odoo: XML-RPC API. Connectors: Magemodule Odoo bridge, EmiproTech Odoo-Magento. Custom: $10, $20k. Good for SMB wholesalers who run Odoo ERP + Magento commerce.
• Microsoft Dynamics 365: OData / Dataverse APIs. Connectors: Sana Commerce (built specifically for Dynamics), e-bridge by CData. Custom: $25, $50k.
• Zoho Inventory / Books: direct REST. Connectors: SkyVia, Zapier (small scale). Custom: $5, $15k. Good for SMB.

Decision rule: if you’re under $5M GMV with standard SKU master, a connector + middleware is faster (4-6 weeks). Above $5M with complex multi-warehouse / multi-currency / IDoc-based SAP, custom direct integration is more reliable and 3-year-cheaper despite the higher upfront cost.