Our accounts are in Tally, everything else is in Excel.
ERPNext runs sales, purchase, stock, production and accounts in one place; Excel stops being the system of record.

Masters and opening balances migrated, history left where it is, the books reconciled before cutover, and GST, e-invoicing and e-way bills set up in ERPNext. Where accounts need to stay in Tally for a while, ERPNext can keep it updated.
Bizmap started out implementing ERPNext for companies that had outgrown Tally and spreadsheets. Tally keeps the books well. What it does not do is run orders, production, stock by location, approvals and service in the same system. ERPNext does, and the move is mostly a question of what you bring across, on which date, and how you prove the numbers match.
Our accounts are in Tally, everything else is in Excel.
ERPNext runs sales, purchase, stock, production and accounts in one place; Excel stops being the system of record.
We are afraid of losing years of history.
History stays in Tally, read-only, for reference and audit. We migrate masters and opening balances, and history only where a regulator needs it in the new system.
Our accountant does not want to leave Tally yet.
ERPNext can run operations first while a scheduled sync keeps Tally up to date for accounting, as it does every day at JAT Metal Pressing. Accounts move when you are ready.
GST, e-invoicing and e-way bills must keep working on day one.
India Compliance is set up in ERPNext for GST, e-invoicing and e-way bills, and tested on your own transactions before cutover.
Usually the start of a month or quarter, so each period closes in one system.
Migration templates issued in the first week; your team cleans the masters with our validators.
Each one reconciled: trial balance, stock, open receivables and payables, and bank must match Tally.
Your accounts and operations teams run their own transactions, including GST invoices, on a staging copy.
Final balances loaded on the date you chose, a parallel run where risk warrants it, and Tally kept read-only afterwards.
We stay with your accounts team until the first month-end closes in ERPNext.
No. We migrate masters and opening balances on the cutover date. History stays in Tally, read-only, unless a regulator needs it in the new system.
Yes. ERPNext can run operations while a scheduled sync keeps Tally up to date. JAT Metal Pressing runs orders, production, quality and dispatch in ERPNext with a daily Tally sync for accounting.
That is part of the cutover plan. India Compliance is set up in ERPNext and tested on your own invoices in the dry runs, before any live transaction.
At the start of a period, usually a month or a quarter, so each period closes in one system. The date is yours to choose; we plan the dry runs back from it.
Before cutover we reconcile the trial balance, stock, open receivables and payables, and bank against Tally, in two dry runs and again at the final load.
Offices in Mumbai and Pune. An engineer replies within one working day.