Is this feature available for all Canadian banks?

Yes, Interac e-Transfer is generally available for most Canadian banks and credit unions. While not every institution offers the service, the majority of online banking platforms in Canada support it. This includes the big five banks (BMO, Scotiabank, CIBC, RBC, TD) and others like Desjardins, Tangerine, National Bank, Simplii, PC Financial, and EQ Bank, as well as many credit unions.