International Money Transfer - Cheapest options out there?

Hope everyone is having a great weekend. I have 3-5 contractors overseas and I have to pay them monthly. I am transferring $5-$10k AUD every month. I have been using worldremit for past couple of months but just realised today that their exchange rate is not the best. What do you guys use to transfer funds? I looked into transferwise (now wise.com) but their fees are quite hight but exchange rate is pretty good.

Is there a tool that you use to compare the exchange rate across various platforms? Perhaps this is a problem that needs solving?