For a quick kill of the ants, especial if they swarm, the Best Thing I found was blue Window Cleaner with ammonia. It will stop them cold. But won't keep them away permanently.
Second best is an open bag of powder sugar at least a 1lbs, leave it where they can get into it, once they discover it and swarm it, use your best and hardest throw to throw it far away from your kitchen or bathrooms, the ants will follow the free food and snack on it all year, you will need to give them new bag every spring. They also need an outside water souce far away your house!
However, if they are trying to find water in you house nothing will stop them but Orkin, but you have to hit hard and fast!!!! It only takes one scout ant to give you real headaches!!!
And earth friendly pest companies are worthless, and costly and the ants return.