Architecture

Bridging On-Prem ERPs (Tally, SAP) to Cloud CRMs Without Custom Middleware Hell

A battle-tested architecture for event-driven XML/JSON bidirectional sync with legacy on-premise accounting software and modern cloud platforms.

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Over 85% of Indian manufacturing and distribution companies rely on Tally or on-premise SAP installations. Connecting these systems to modern cloud CRMs has historically required expensive, fragile middleware.

The Lightweight Local Bridge Pattern

We deploy an encrypted local agent that monitors the Tally ODBC/XML port. When an invoice or payment receipt is generated, the agent encrypts the payload and pushes it to our cloud webhook gateway.

Two-Way Ledger Reconciliation

When sales reps log a closed deal in Kora CRM, the cloud gateway dispatches an encrypted payload back to the local agent, drafting a Sales Order in Tally for accountant approval.

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Architectural Takeaways

  • → Avoid direct open-port exposure; use outbound-only secure WebSocket/HTTPS tunnels.
  • → Always require human signoff for high-value accounting ledger entries.
  • → Maintain an immutable offline audit log in case of internet connectivity dips.
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