Build a Cross-Platform Profile Matcher: Find the Same Creator Everywhere

A brand wants to work with @sarah_creates on TikTok. She has 150K followers. Great. But does she have an Instagram? A YouTube? A Twitter? What's her total reach? You could ask her. Or you could search manually. Open 5 tabs. Try different username variations. Scroll through results. Hope you got the right person. Or you could build a tool that does it in seconds. Search every platform, match by username similarity + bio + profile picture + display name, and output a unified cross-platform profile. Here's the full build. The Stack Node.js – runtime SociaVault API – search users and fetch profiles across platforms String similarity – fuzzy matching for username variations Why Cross-Platform Matters Creator TikTok Only All Platforms Followers 150,000 312,400 Avg Engagement 5.8% 4.2% (weighted) Content Types Short video only Video + Photo + Long-form CPM Potential $150 $312 Knowing the full picture changes the deal. And it gives brands confidence they're investing in someone with a real, di