[Note! Apparently, this is an investment only account. You can't actually move Monero off of Circle's platform.]
You can now buy Monero and Zcash with Circle:
"Last week, we welcomed Zcash to the coin family on Circle Invest. Today, we continue to grow our coin collection by supporting Monero as our new listed crypto asset. This brings our investable crypto assets to a total of 7 coins, making Circle Invest one of the only platforms you can invest instantly and seamlessly in the widest breadth of coins by using your bank account."
https://blog.circle.com/2018/05/07/circle-invest-welcomes-monero/
You can now buy Monero and Zcash with Circle:
"Last week, we welcomed Zcash to the coin family on Circle Invest. Today, we continue to grow our coin collection by supporting Monero as our new listed crypto asset. This brings our investable crypto assets to a total of 7 coins, making Circle Invest one of the only platforms you can invest instantly and seamlessly in the widest breadth of coins by using your bank account."
https://blog.circle.com/2018/05/07/circle-invest-welcomes-monero/