You can perform interbank fund transfers using InstaPay and PESONet. However, the participating banks or financial institutions of these three methods are different.
Visit this link for more information on the list of participating banks for InstaPay and PESONet.
InstaPay transfers are reflected in real-time, while PESONet transfers may take time to be reflected depending on their respective cut-off times. You may check our other FAQs for the cut-off time schedules for PESONet.