Probably Atlassian. It's not the quantity of products so much as the desire to use them and their establishment as the product to use for a given purpose. Slack

Probably Atlassian. It's not the quantity of products so much as the desire to use them and their establishment as the product to use for a given purpose. Slack doesn't have that many competitors that are as useful. Whereas Atlassian has a lot of products no one has ever heard of and a lot of competitors other people have heard of.