Most marketplace startups fail before they ever get traction—not because of weak demand, but because they never seeded quality supply. This playbook breaks down proven tactics for founders to attract, onboard, and retain high-quality suppliers before demand shows up.

Supply photos shape the entire marketplace experience. Clean, high-quality images build trust, improve conversion, boost SEO, and reduce off-platform leakage. This guide breaks down the standards every founder needs to enforce early so your marketplace scales with confidence.

This guide breaks down what high-performing supply actually looks like, why it matters, and how volume, quality, diversity, engagement, and density work together to shape the strength of your marketplace.