Angel Investor at Independent
Founding Triggit, one of the earliest DSPs and real-time bidding platforms, and subsequently becoming one of the most active angel investors in the AdTech and MarTech startup ecosystem.
Last updated Feb 27, 2026 by AI Enrichment
Zach Coelius is best known as the founder and CEO of Triggit, one of the earliest and most influential demand-side platforms (DSPs) in the programmatic advertising industry. Triggit was a pioneer in real-time bidding and programmatic display advertising, helping to define the category before the term 'programmatic' became mainstream. The company was acquired by Facebook in 2015, a validation of both the technology and the team's expertise in ad tech infrastructure. Following the acquisition, Coelius and his team joined Facebook, where Triggit's technology was integrated into Facebook's advertising systems. Since leaving Facebook, Coelius has emerged as one of the most active and respected angel investors in the AdTech and MarTech ecosystem. He has invested in dozens of early-stage companies spanning programmatic advertising, customer data platforms, attribution, identity resolution, and marketing automation. Known for his hands-on, founder-friendly approach, he brings rare operational credibility to his investments — having built and scaled an ad tech company through the formative years of programmatic advertising himself. Coelius is a frequent voice in the AdTech community, sharing perspectives on programmatic advertising, startup strategy, and the evolving digital advertising landscape through social media and industry forums. His combination of deep technical knowledge, operational experience, and active deal-making makes him one of the more influential figures in AdTech venture and angel investing circles.
Facebook (2015-2016)
Triggit (2006-2015)