# Building CollabKar: An AI-Powered Influencer Marketing Platform with Gemini > Source: > Published: 2026-08-28 10:08:42+00:00 *This post was created for the purposes of entering the All Things Agentic Hackathon (Google Cloud & Gemini).* Influencer marketing in India is booming, but for MSMEs and D2C founders it's still a black box. How do you know if a creator's followers are real? What's a *fair* rate for a campaign? And once you pay, is your money actually safe? That's the gap **CollabKar** sets out to close. CollabKar is an AI-powered influencer marketplace that connects brands with vetted creators — no spreadsheets, no cold DMs, no guesswork. A brand can describe their campaign in plain English and get matched with relevant creators instantly. Three things make this possible: `gemini-3.5-flash` , so brands don't need to know the right search filters, they just describe what they want`gemini-3.5-flash` ) for natural-language matching and pricing suggestionsGetting the AI matching to feel conversational — "just describe your campaign" — while still surfacing enough concrete data (rates, engagement, niche fit) for a brand to actually trust the recommendation took real iteration. Fraud detection was its own challenge too: a sudden spike in a creator's followers isn't always fake, sometimes it's just a creator having a great week, and the system has to tell the difference. Built for the **All Things Agentic Hackathon** by Google Cloud & Gemini.