For Christians: If you tithe 10% to charities every week instead of your church, would that count?

Virtually all preachers want members to tithe 10% of their income to that church, since it benefits the church. But let's say someone still tithed 10% of their income to various charities every week instead. How would preachers feel about this? I assume they won't be thrilled someone else is getting the tithe and not them, but would that count as tithing in God's eyes? After all, you're still giving away 10% of your income....