Essential Capital is an early stage venture firm that invests in founders with a mission to build companies that fight humanity’s biggest challenges. Together, our team believes in the power of entrepreneurship and new technologies to radically shift the course of history.

Photo of Michael Costigan

Michael co-founded Essential Capital along with Adam Huda & Stacy Stubblefield to directly address the largest existential threats facing humanity. Having managed sales, business development, and corporate development across a range of different stage businesses – from pre-revenue startups as the first sales hire to growth Series A-B companies, he brings a hands-on operator focus to EC and deep expertise partnering with founders to help them define & execute on go-to-market strategy. Michael is responsible for setting the investment focus & thesis of Essential Capital.

Michael Costigan
Founder & Managing Partner
Photo of Stacy Stubblefield

Stacy joined Essential Capital as an Operating Partner working alongside Michael Costigan and Adam Huda to help portfolio founders build high value, high growth companies. In 2005 Stacy co-founded TeleSign Corporation where she led Product Strategy and scaled the business to over 100M in revenue. TeleSign was recently acquired by BICS for 230M. As an entrepreneur, Stacy has lived the full lifecycle of a venture-backed startup – from seed stage to successful exit. Stacy’s deep operational expertise & track record of success has made her a recognizable authority in the SaaS world.

Stacy Stubblefield
Founder & Operating Partner

Why Work With Us?

Mission Driven

We believe entrepreneurs and their teams are the best positioned people to change the status quo and create positive lasting impact in our world.

Hands-on Operators

Our team brings over 35 years of combined sales, engineering, and product experience. We strive to have our Founders view us as an extension of their team.

Long Term View

Startups have high-highs and low-lows. We’re a patient partner in your long term success, driven to help you reach those early critical milestones.