The problem-first email
Your default opener
Subject[Problem] at [Company]?
Hi [First name],
[Something true you noticed, such as 'you're hiring three salespeople in Austin'.] When [type of company] does that, [the problem it usually brings] tends to follow.
We help [similar companies] [result, in plain words].
Worth a 15-minute call to see if it applies to you?
[Your name] [Title], [Company]