Can I add Multiple broker in my account?

Can I add two Zerodha and one Aliceblue account?

You can add 1 broker account for different brokers, but you cannot add multiple accounts from same broker.

For example, you can add 1 account from Alice Blue and 1 from Zerodha, but you cannot add 2 accounts from AliceBlue.

As for deployment, the deployment is tagged with 1 broker account, hence for each broker you will have to make a new deployment.