HubSpot vs Klaviyo: Founders, CEOs and History
HubSpot was founded in 2006 by Brian Halligan, Dharmesh Shah and is led by Yamini Rangan. Klaviyo was founded in 2012 by Andrew Bialecki, Ed Hallen and is led by Andrew Bialecki & Chano Fernández (co-CEOs).
Company facts
Founders
HubSpot
Brian Halligan
Brian Halligan co-founded HubSpot in 2006 with Dharmesh Shah after the two met at MIT Sloan.
Dharmesh Shah
Dharmesh Shah is HubSpot's co-founder and Chief Technology Officer, a role he has held since 2006.
Klaviyo
Andrew Bialecki
Andrew Bialecki co-founded Klaviyo in 2012 and has led it since, taking it through its 2023 NYSE IPO and past $1 billion in annual revenue in 2025.
Ed Hallen
Ed Hallen co-founded Klaviyo in 2012 and led product for much of its early history, shaping the flow builder and segmentation tools merchants use. He remains on Klaviyo's board of directors.
CEOs and their tenures
HubSpot
- Brian Halligan2006–2021
Co-founder and Chief Executive Officer
Co-founded HubSpot in 2006 and led it until Yamini Rangan took over in 2021.
Source - Dharmesh Shah2006–present
Co-founder and Chief Technology Officer
Co-founded HubSpot and shapes its technology, culture, and AI agent strategy.
Source - Kathryn Bueker2019–present
Chief Financial Officer
Leads finance and investor relations, presenting HubSpot's quarterly results and guidance.
Source - Yamini Rangan2021–present
Chief Executive Officer
Under Rangan HubSpot grew revenue from $1.30 billion in 2021 to $3.13 billion in 2025 and reached full-year GAAP profitability in 2024, though growth slowed and the stock fell sharply in 2026.
Source
Klaviyo
- Andrew Bialecki2012–present
Co-Founder & Co-Chief Executive Officer
Co-founded Klaviyo, led it to its 2023 NYSE IPO and $1.234 billion in 2025 revenue; now oversees product, engineering and vision.
Source - Ed Hallen2012–present
Co-Founder & Director
Co-founded Klaviyo and led early product development.
Source - Amanda Whalen2022–present
Chief Financial Officer
Led finance through the 2023 IPO and reports quarterly results and guidance.
Source - Chano Fernández2026–present
Co-Chief Executive Officer
Former Workday co-CEO and Klaviyo board member since 2023; appointed co-CEO effective January 1, 2026 to lead go-to-market, operations and G&A.
Source
Timeline: HubSpot and Klaviyo side by side
2006HubSpot
HubSpot Founded: Brian Halligan and Dharmesh Shah founded HubSpot around the idea that companies could attract customers with useful content rather than interruption-heavy marketing.
2012Klaviyo
Klaviyo founded in Boston
Andrew Bialecki and Ed Hallen started Klaviyo.
2014HubSpot
NYSE IPO: HubSpot went public on the New York Stock Exchange under ticker HUBS, giving the inbound-marketing software company capital and visibility.
2014HubSpot
Free CRM Launch: The free CRM became a product-led entry point that let HubSpot move from marketing automation toward a wider customer platform.
2021HubSpot
Yamini Rangan Becomes CEO: Yamini Rangan succeeded co-founder Brian Halligan as CEO, bringing customer, sales, and enterprise software experience to HubSpot's next phase.
2021Klaviyo
$320 million Series D at a $9.15 billion valuation
Klaviyo raised $320 million in May 2021 in a round led by Sands Capital, with Accel and Summit Partners participating, valuing the company at $9.15 billion.
2022Klaviyo
Shopify partnership
Shopify became a strategic partner and investor.
2023HubSpot
Clearbit Acquisition: HubSpot acquired Clearbit to add B2B data enrichment and strengthen the Smart CRM's customer intelligence layer.
2023Klaviyo
NYSE IPO
Klaviyo began trading on the NYSE as KVYO in September 2023.
2025HubSpot
$3.1B FY2025 Revenue: HubSpot reported $3.131B in FY2025 revenue, $45.9M in net income, 8,882 full-time employees, and 288,706 customers.
2025Klaviyo
$1.234 billion revenue; co-CEO named
Revenue grew 32%; in December Klaviyo named Chano Fernández co-CEO effective January 1, 2026.
2026HubSpot
Warmly acquisition and Q2 2026 results
HubSpot agreed to buy Warmly on June 30, 2026, then reported Q2 revenue of $911.7 million (up 20%) and 306,446 customers.
2026Klaviyo
Q2 revenue $370.6 million; guidance raised
Revenue grew 26%, customers passed 205,000 and FY26 guidance rose to $1.526-$1.534 billion.
Acquisitions
HubSpot
- Starter Story2026Undisclosed
- Warmly2026Undisclosed
- XFunnel2025Undisclosed
- Frame AI2024Undisclosed
- Clearbit2023Undisclosed
- The Hustle2021$27M
Questions about HubSpot vs Klaviyo
Who is the CEO of HubSpot, Inc. and Klaviyo, Inc.?
HubSpot, Inc. is led by Yamini Rangan and Klaviyo, Inc. is led by Andrew Bialecki & Chano Fernández (co-CEOs). Both serve as the top executive responsible for the company's strategy, operations, and financial performance.
When was HubSpot, Inc. founded vs Klaviyo, Inc.?
HubSpot, Inc. was founded in 2006 — 6 years before Klaviyo, Inc., which was founded in 2012. HubSpot, Inc.'s longer operating history gives it a deeper track record but also potentially more institutional inertia compared to the younger Klaviyo, Inc..
How many employees does HubSpot, Inc. have compared to Klaviyo, Inc.?
HubSpot, Inc. employs approximately 8,882 people, while Klaviyo, Inc. employs approximately 2,368. HubSpot, Inc. has the larger workforce at 8,882 employees, compared to Klaviyo, Inc.'s 2,368. A higher headcount does not necessarily imply greater efficiency — it often reflects differences in business model (e.g., manufacturing vs. software).
Where are HubSpot, Inc. and Klaviyo, Inc. headquartered?
Both HubSpot, Inc. and Klaviyo, Inc. are headquartered in United States, meaning they operate under the same primary regulatory and tax environment.
Who founded HubSpot, Inc. and Klaviyo, Inc.?
HubSpot, Inc. was founded by Brian Halligan, Dharmesh Shah. Klaviyo, Inc. was founded by Andrew Bialecki, Ed Hallen.
Which company has a longer operating history — HubSpot, Inc. or Klaviyo, Inc.?
HubSpot, Inc. has been operating for approximately 20 years, making it the more established of the two companies. Klaviyo, Inc. has been in operation for around 14 years. A longer operating history often signals greater institutional resilience and brand recognition, though it can also mean slower adaptation to new market conditions.
Figures come from each company's filings and the sources linked beside them. Amounts reported in another currency are shown in US dollars at an approximate rate and marked with ~. Back to the HubSpot vs Klaviyo overview