Beat to it
Definition 1 of 1
Pro Tip 1/3Friendly Rivalry
Used when winning a friendly or informal competition to get or do something. 
We all raced to the top of the hill, but Julie beat us to it.
Pro Tip 2/3Action Speed
Highlights swift action; someone acted faster than others in a particular situation. 
I thought of answering the question, but my classmate beat me to it.
Pro Tip 3/3Disappointment
May express a sense of disappointment or slight frustration when someone else is first. 
I had the perfect comment for the post, but someone else beat me to it.