(Post author here.)
In addition to having deep integrations with these tools, we actually do have real partnerships with almost all of them.
"What's a real partnership?" is a great question, but I'd mostly think of it principally as "We know them, they know us, we have a red phone we can pick up to get things solved for each other" (which is good for the customer), and then also "And we occasionally do some comarketing together."