I've been using Gruntly to connect with fellow startup enthusiasts in my field, and it's been a real time-saver. Before, I was drowning in a sea of messages, most of which weren't relevant to me. But with Gruntly, I've discovered so much valuable information that I was previously missing out on, simply because there was too much to sift through.
It's worth noting that I created Gruntly with this very goal in mind. However, the extent of its usefulness, even to me as the creator, has been a pleasant surprise.
