Petrichor Projects is a brand strategy consultancy that engineers relevancy for post-funding founders. Its proprietary methodology, Relevancy Engineering, operates on three structural legs: authentic core, category ownership, and distribution mastery. Most positioning work ends with a document. Relevancy Engineering ends with infrastructure: a named framework, a canonical document, and a proof architecture that keeps working after the engagement closes. Petrichor is not a brand agency, not a creative studio, and not reputation management. Agencies build campaigns. Petrichor builds the structure a campaign runs on. Founded 2022. Boston, Massachusetts.