Build a Competitor Hashtag Gap Analyzer with Node.js

Your competitor is getting 3x your reach on TikTok. Same niche. Similar content. What are they doing differently? Hashtags. Not the obvious ones you both use. The ones they use that you don't. The gaps in your strategy that you don't even know exist. I built a tool that compares hashtag strategies between any two creators and finds the exact gaps. Takes about 50 lines of actual logic. Here's the whole thing. The Stack Node.js – runtime SociaVault API – fetch posts and captions across platforms Set operations – difference, intersection, frequency analysis The Concept Your Hashtags: #fitness #gym #workout #gains #fitfam Competitor's: #fitness #gym #gymtok #fitnesstips #homeworkout #formcheck Gap (they use, you don't): #gymtok #fitnesstips #homeworkout #formcheck Overlap (you both use): #fitness #gym Wasted (you use, they don't): #workout #gains #fitfam The gap is where the opportunity lives. Those are proven hashtags in your niche that you're ignoring. Step 1: Fetch Post Data const axios