Xero
SME accountingXero is a cloud accounting platform covering invoicing, bills, bank reconciliation and reporting, available on web and mobile with iOS and Android apps. It is widely positioned for SMEs and accountants working on the same set of books, which is the part Singapore firms tend to value most once a bookkeeper is involved.
The Singapore edition supports GST-related workflows and InvoiceNow readiness. That places it alongside the local products on compliance rather than outside them.
The trade-off is configuration. Xero's strength is its ecosystem of connected apps, and a business with unusual requirements will typically solve them by adding one. Good if you like assembling a stack, less good if you want the answer in the box.
On reconciliation, Xero's bank feed handling is mature, and it is one of the platforms an accountant is most likely to already know. For a first cloud migration with an external accountant, that familiarity has real value.