Cimb SG or transferwise. I prefer  transferwise cheaper. Of course you don't be like our friend here Jack2 who kena banned from transferwise. for God knows what he did.  So far I had no issue with transferwise. Rate cheap and speed fast.
They don't support transfer from SG.

Is already cheap vs SG banks. And no one transfer only SGD100.
For those without access to Singx, M1 remittance, instsrem SG, transferwise is considered God send as the only 2 way to send money back to malaysia cheaply (transferwise and Cimb SG ). That's why I said if have access to other service use other service. If don't have, then one is stuck with the 2 of them.

Rates can be found after login.

More or less transferwise rates. Sometimes transferwise wins, sometimes Cimb.  Still cheaper than using DBS/OCBC/UOB.