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Billionaire Profile
Andrew Bialecki
Global Rank
#2822

Image: Uzeu:Djozewal | CC BY-SA 4.0 | via Wikimedia Commons

Andrew Bialecki

CEO, Marketing software
Boston, Massachusetts
Real-Time Net Worth
$1.39B
Estimated based on Marketing software stock value as of September 10, 2026
-8.29% (24h)
Age
40
Source
Marketing software
Industry
Technology
Citizenship
United States

Biography

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.

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Data Updated
Sep 10, 2026
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Wealth Over Time

Net Worth History

YearNet Worth
2026$1.39B
2025$1.50B
2024$1.50B

Portfolio Holdings

HubSpot

HubSpot

HUBStechnology
Market Cap
$12.6B
Stock Price
$237.94
Cambridge, Massachusetts
8,882 (2025) employees
Founded 2006

In-Depth Profile

Andrew Bialecki is the co-founder and Chief Executive Officer of Klaviyo, a marketing automation software company based in the United States. His wealth is derived from his ownership stake in Klaviyo, a technology company that he co-founded and subsequently led through its initial public offering. Klaviyo specializes in providing marketing software solutions, primarily focusing on email and SMS marketing automation for businesses, particularly those in the e-commerce sector. The platform helps companies store, access, analyze, and use their customer data to create personalized marketing campaigns, automate communications, and track performance. This allows businesses to engage more effectively with their customers and drive sales.

Bialecki's educational background includes a Bachelor of Arts degree from Harvard University, where he studied Physics, Astronomy, and Astrophysics. This academic foundation preceded his career in technology and software development. His professional journey prior to co-founding Klaviyo included various engineering roles. He served as a Lead Engineer at Applied Predictive Technologies and later as a Senior Engineer at Performable. His experience further broadened when he took on the role of Chief Technology Officer at RockTech, a company also operating in the sales and marketing software space. This period, spanning from two thousand eleven to two thousand twelve, provided him with direct exposure to the leadership and technical demands of the industry.

In two thousand twelve, Andrew Bialecki co-founded Klaviyo, marking a significant turning point in his career and the beginning of his primary source of wealth. As co-founder and CEO, he has been instrumental in shaping the company's direction and growth. Under his leadership, Klaviyo developed its core marketing automation platform, which has become a significant tool for e-commerce businesses seeking to optimize their customer engagement strategies. The company's focus on data-driven marketing and automation has allowed it to carve out a substantial position within the competitive technology landscape.

Klaviyo's growth culminated in its initial public offering in two thousand twenty-three, a major milestone for the company and for Bialecki. Taking the company public meant that shares became available for trading on a stock exchange, further solidifying the valuation of the company and, consequently, the value of Bialecki's ownership stake. His wealth is directly tied to the performance and market capitalization of Klaviyo, reflecting the success of the business he helped build and continues to lead. His ongoing efforts are directed towards expanding Klaviyo's market reach and enhancing its capabilities, particularly in areas like artificial intelligence, to further strengthen its offerings to businesses.

Career Milestones

2007

Graduated from Harvard

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

2011-2012

Chief Technology Officer at RockTech

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

2012

Co-founded Klaviyo

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

2023

Klaviyo IPO

Took Klaviyo public.

Philanthropy & Social Impact

Category not found.

Actual initiative not found.

$XB

Description not found.

Business Philosophy & Leadership

Notable Quotes

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Leadership Principles

Data-Driven Approach

Emphasizes the use of data and analytics to inform decision-making and marketing strategies.

Customer-Centricity

Focuses on understanding and meeting the needs of customers through personalized experiences.

Transparency

Demonstrates openness and honesty in communication, including addressing challenges like security incidents.

Controversies & Challenges

2022

Security Incident

Klaviyo faced a security incident. Bialecki's transparent handling of the situation helped the company maintain trust.

Billionaires Connected to Andrew Bialecki

Peers in Technology

All Technology billionaires

Adjacent Global Ranks

Full global ranking

Frequently Asked Questions

What is Andrew Bialecki's net worth in 2026?
As of 2026, Andrew Bialecki's estimated net worth is $1.39 billion, ranking #2822 among the world's billionaires. The estimate is based on publicly available shareholding data and market prices, updated daily.
How did Andrew Bialecki make their money?
Andrew Bialecki's wealth primarily comes from Marketing software, most notably through Marketing software.
Where is Andrew Bialecki from?
Andrew Bialecki is from United States.
How old is Andrew Bialecki?
Andrew Bialecki is 40 years old.

Sources & References

  1. Andrew Bialecki — Forbes profile Forbes