Work-Bench leads Petra Labs’ $5.2 million seed round

• Work-Bench led Petra Labs’ $5.2 million seed financing, backing the New York-based startup focused on attribution for AI-driven search.
• Petra Labs builds custom “last-mile” attribution models that link AI search visibility to client outcomes such as revenue or qualified pipeline.
• The platform combines an attribution engine with large-scale LLM simulations and a classification layer tracking brand mentions and citation dynamics across models.
• Petra Labs began as a fully managed AEO service, then productized its workflow into software for enterprise marketing teams.

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