BillionaireNet
Bialecki
Andrew Bialecki
Rank #1436
UNITED STATESTechnologyMarketing software

Andrew Bialecki

Net Worth
$2.794B
+5.02% (24h)
Andrew Bialecki is the co-founder and CEO of Klaviyo, a leading marketing automation platform. With a background in physics, astronomy, and astrophysics from Harvard University, Bialecki brings a data-driven approach to the SaaS industry. His career includes roles at Applied Predictive Technologies, Performable, and RockTech. As CEO of Klaviyo, Bialecki has overseen significant growth, helping e-commerce businesses build customer relationships through personalized marketing strategies. As of January 1, 2026, he will become Co-CEO.

The Full Dossier

Early Life and Education

Andrew Bialecki, a Massachusetts native, showed early interests in technology and business. He attended Harvard University, graduating in 2007 with a Bachelor of Arts in Physics, Astronomy, and Astrophysics. This academic background provided him with critical thinking and analytical skills that he later applied to his business ventures. During his time at Harvard, Bialecki also interned at Microsoft.

Early Career and Founding of Klaviyo

Before founding Klaviyo in 2012 with Ed Hallen, Bialecki gained experience in various tech roles. He served as Lead Engineer at Applied Predictive Technologies, Senior Engineer at Performable (a marketing software company), and Chief Technology Officer at RockTech, a sales and marketing platform. These roles gave him valuable experience in data-driven marketing, which helped shape his vision for Klaviyo. The experience at Performable, which was acquired by HubSpot, provided insights into market gaps. In 2012, he co-founded Klaviyo in Boston, Massachusetts, aiming to transform how businesses communicate with customers using data for personalized marketing strategies.

Key Business Strategies

Under Bialecki's leadership, Klaviyo has grown into a major player in e-commerce marketing, offering tools for email and SMS marketing automation. Klaviyo's success is built on a focus on data-driven decision-making and scalability. Bialecki emphasizes sustainable growth, customer data and insights, long-term value creation, and product excellence over marketing hype.

Philanthropy

Information about Andrew Bialecki's specific philanthropic activities and amounts is not readily available through a search of the available sources.

Career Timeline

2026

Co-CEO

Will become Co-CEO of Klaviyo on January 1, 2026.

2012

Co-founder and CEO

Co-founded Klaviyo and became its CEO.

2011

Chief Technology Officer

Served as Chief Technology Officer at RockTech.

2010

Senior Engineer

Worked as a Senior Engineer at Performable.

2007

Lead Engineer

Joined Applied Predictive Technologies as a Lead Engineer.

Philanthropic Impact

Information Not Available$XB

Information Not Available

Information about Andrew Bialecki's philanthropic activities and amounts is not readily available through a search of the available sources.

Wealth Trajectory