- "Hey" -- 64% response rate
- "Hello" -- 63.6% response rate
- "Hi" -- 62.7% response rate
- "Greetings" -- 57.2% response rate
- "Dear" -- 56.5% response rate
The overall response rate for all of the messages was 47.5%, which suggests that including an opening salutation is a good move if you want a response (no one said data can't point out the obvious). Another takeaway the data points to is the fact that a more formal greeting is less likely to get a reply. As Boomerang data scientist Brendan Greenley notes, that tracks with the research that formality in online communication can often be found when there's less shared context and among people who don't like each other, which hints at yet another reason why someone may not get respond.
And while an opening line is clearly important, it's also worth mentioning the sort of closing remark you include may have a huge impact on whether or not you get a reply. In fact, ending with an expression of gratitude correlates to a a 36% relative increase in the average response rate. In other words, signing off with a simple "Thanks" is a go-to move if you really want to hear back from someone.