LeaderPortfolio
Bialecki
Andrew Bialecki
Rank #2940
UNITED STATESTechnologyMarketing software

Andrew Bialecki

Net Worth
$1.253B
-1.64% (24h)
Andrew Bialecki is the co-founder and CEO of Klaviyo, a marketing automation software company. His estimated net worth is $1.5 billion. Bialecki's journey includes a bachelor's degree in Physics, Astronomy, and Astrophysics from Harvard University. Before founding Klaviyo in 2012, he held roles as Lead Engineer at Applied Predictive Technologies, Senior Engineer at Performable, and CTO at RockTech. Klaviyo, under his leadership, has become a major force in e-commerce marketing. He is focused on expanding the company's reach and enhancing its AI capabilities. In 2022, Bialecki's transparent handling of a security incident demonstrated his commitment to accountability and customer trust.

How to read Andrew Bialecki's profile

Public net-worth figures are estimates. They combine observable inputs—typically listed equity, disclosed transactions, and market prices—with editorial judgment where filings are incomplete (for example, private holdings, debt, or cross-holdings). For Andrew Bialecki, we anchor the narrative to Marketing software and Marketing software, then update the headline number as markets move. The chart on this page is meant to show trajectory, not a certified balance sheet.

When you see $1.253B alongside global rank #2940, interpret it as our best synthesis of widely cited ownership and price signals—not a claim about cash on hand. Estimates can diverge from other publishers because of different treatment of options, trusts, charitable vehicles, or illiquid assets. We document the general approach in methodology and welcome corrections via corrections.

Country (UNITED STATES) and career milestones on this page are curated for reader context; they should be verified against primary sources when used for research. Editorial metadata for this profile is refreshed on a rolling basis, with deeper audits at least annually (last noted cycle: 2026).

Looking for depth? When available, the dossier and timeline sections below add long-form context beyond the headline number—prioritize those modules when evaluating claims about strategy, controversies, or philanthropic commitments.

The Full Dossier

Early Life and Education

Andrew Bialecki's early life began in Massachusetts, where he demonstrated an early aptitude for technology and business. He pursued his higher education at Harvard University, where he earned a Bachelor of Arts degree in Physics, Astronomy, and Astrophysics between 2003 and 2007.

Rise to Success

Before founding Klaviyo in 2012, Bialecki gained valuable experience in various technical roles. He worked as a Lead Engineer at Applied Predictive Technologies, as well as Senior Engineer at Performable, and Chief Technology Officer at RockTech. These experiences shaped his vision for Klaviyo and exposed him to the power of data-driven marketing. Klaviyo, under his leadership, has grown from a startup into a major force in e-commerce marketing. The company's platform helps businesses collect and analyze customer data to create personalized marketing campaigns across multiple channels, including email and SMS.

Key Business Strategies

Bialecki's strategic decision-making and entrepreneurial spirit have been instrumental in Klaviyo's success. He focused on efficiency and retained sizable control, owning 38% when the firm went public in 2023. Bialecki took a low base salary in 2022, which was around $78,670.

Philanthropy

Data not available.

Career Timeline

2023

Klaviyo IPO

Took Klaviyo public.

2012

Co-founded Klaviyo

Co-founded Klaviyo, a marketing automation software company, and became its CEO.

2011-2012

Chief Technology Officer at RockTech

Held the role of Chief Technology Officer at RockTech, a sales and marketing software company.

2007

Graduated from Harvard

Earned a Bachelor of Arts degree in Physics, Astronomy, and Astrophysics.

Philanthropic Impact

Category not found.$XB

Actual initiative not found.

Description not found.

Key Business Ventures & Holdings

CompanyStakeValue
HubSpot

Net Worth History

In-Depth Analysis

Early Life and Education

Andrew Bialecki's early life began in Massachusetts, where he demonstrated an early aptitude for technology and business. He pursued his higher education at Harvard University, where he earned a Bachelor of Arts degree in Physics, Astronomy, and Astrophysics between 2003 and 2007.

Rise to Success

Before founding Klaviyo in 2012, Bialecki gained valuable experience in various technical roles. He worked as a Lead Engineer at Applied Predictive Technologies, as well as Senior Engineer at Performable, and Chief Technology Officer at RockTech. These experiences shaped his vision for Klaviyo and exposed him to the power of data-driven marketing. Klaviyo, under his leadership, has grown from a startup into a major force in e-commerce marketing. The company's platform helps businesses collect and analyze customer data to create personalized marketing campaigns across multiple channels, including email and SMS.

Key Business Strategies

Bialecki's strategic decision-making and entrepreneurial spirit have been instrumental in Klaviyo's success. He focused on efficiency and retained sizable control, owning 38% when the firm went public in 2023. Bialecki took a low base salary in 2022, which was around $78,670.

Philanthropy

Data not available.

Data Sources & Methodology

Figures for Andrew Bialecki are synthesized from the sources below and cross-checked against our net worth methodology. Estimates may lag market moves; see corrections to report discrepancies.