Klaviyo, the rapidly growing e-commerce marketing automation platform, has announced a significant leadership restructuring: co-founder and CEO Andrew Bialecki is bringing in seasoned executive Chano Fernandez as co-CEO. This strategic move allows Bialecki to step back from day-to-day operational management and dedicate his focus intensely to product development, particularly in the burgeoning field of artificial intelligence.

For many technical founders, the idea of delegating operational responsibilities to return to their passion for building products is a long-held dream. Fernandez will oversee go-to-market (GTM) strategies, operations, and general & administrative (G&A) functions, while Bialecki will concentrate on engineering, product innovation, and long-term vision. The question, however, remains: does this co-CEO model actually work in practice?

Klaviyo's Momentum and Ambitious AI Vision

Klaviyo is currently experiencing impressive growth, boasting a $1.2 billion revenue run rate and a 32% year-over-year growth. With over 183,000 customers, the company facilitated $3.8 billion in attributed revenue from 22 billion messages during a single Black Friday/Cyber Monday period. Its market capitalization stands around $9 billion.

Bialecki foresees a massive opportunity on the horizon: the explosion of AI agents in e-commerce. He stated in his announcement that "LLMs and the current wave of AI were going to create a step change in how businesses defined customer experiences." His vision is that AI agents will autonomously draft, execute, and optimize marketing campaigns, moving beyond manual user configuration. This significant product bet requires Bialecki to be deeply involved in the code and development, rather than boardroom discussions.

This is where Chano Fernandez comes in. His appointment is far from a random hire. Fernandez served as co-CEO of Workday from 2020 to 2022 alongside Aneel Bhusri, having previously been co-President. During his nine years at Workday, he was instrumental in scaling revenue from $469 million to $6.2 billion. His extensive background also includes roles at McKinsey, SAP, and Infor. Fernandez has been a member of Klaviyo's board for two years, and Bialecki notes they have developed a "deep respect for each other's intensity and intellect" through shared interactions.

The Founder's Dream: Back to Product

Many technical founders who have scaled companies past $50 million in annual recurring revenue (ARR) often fantasize about returning to product development. The CEO role evolves significantly: from hands-on coding at $10 million ARR, to managing managers at $100 million, and effectively running a "small country" at $1 billion. The desire to "get back to product" is powerful, as it's where founders feel most impactful and can add the most differentiated value, leveraging their unique understanding of the customer, problem, and vision.

The logic seems straightforward: hire a capable operator to manage sales, marketing, operations, finance, legal, and HR—the "generic" aspects—allowing the founder to focus on what only they can do. However, this model rarely succeeds.

The Challenge: "There Can Only Be One CEO"

A recurring sentiment among public company CEOs is that "there can only be one CEO." This isn't due to ego, but rather the practical realities of leadership. In moments of crisis, executive disputes, strategic decisions, or major acquisitions, a single, definitive leader is required to make the final call. The CEO role is not easily divisible. Product and go-to-market functions are deeply intertwined; pricing impacts product, positioning influences sales, and sales feedback shapes the product roadmap.

At a company valued at $1 billion, hundreds of gray areas arise weekly, demanding a clear tiebreaker. If both co-CEOs believe they hold this authority, it can lead to paralysis, internal politics, or both. This fundamental challenge is why most co-CEO arrangements dissolve, often with one individual departing within 18-24 months.

A Look at the Co-CEO Graveyard

The track record of the co-CEO model is largely unfavorable:

  • SAP: Attempted co-CEO structures multiple times, with repeated failures. Christian Klein and Jennifer Morgan lasted only six months, with SAP citing the need for "a clear leadership structure" to act "quickly and decisively."
  • Salesforce: Marc Benioff tried this twice. Keith Block served as co-CEO for 18 months before leaving, and Bret Taylor lasted about a year. Benioff has since returned as sole CEO on both occasions.
  • Oracle: Safra Catz and Mark Hurd operated as dual CEOs under Larry Ellison for years. While seemingly successful, Ellison never truly relinquished control, and upon Hurd's passing, he was not replaced, leaving Catz as sole CEO.

Even Atlassian, where the co-CEO model worked for two decades with co-founders Mike Cannon-Brookes and Scott Farquhar, eventually saw Farquhar step down from the role.

As one industry analysis bluntly put it, "If companies were meant to be led by co-CEOs, we'd see that model everywhere instead of nowhere." While it can potentially work with truly equal and close co-founders, it proves particularly challenging with an external hire.

The Force Multiplier: A Key Advantage with Customers

Despite the inherent difficulties, one significant advantage of the co-CEO model is often overlooked: the ability to serve as a "force multiplier" with customers. In enterprise sales, CEO involvement is the ultimate trump card for unsticking stalled deals, mitigating renewal risks, or nurturing strategic accounts. However, a single CEO's time is limited.

With two co-CEOs, a company can double its high-level customer engagement. For example, Chano Fernandez could be closing a major European account in London while Andrew Bialecki meets with a key partner in Boston. Both conversations carry the weight of "CEO," ensuring customers feel they are engaging with the highest level of leadership.

At Workday, this was a tangible benefit. Bhusri could focus on product-centric discussions—roadmap, vision, technical deep-dives—while Fernandez handled business conversations, including contracts, expansions, and executive relationships. This dual leadership provided twice the customer coverage at the executive level, a crucial factor for a company like Klaviyo with over 183,000 customers and aggressive enterprise ambitions.

When the Co-CEO Model Succeeds

Workday, Chano Fernandez's former company, stands out as perhaps the best example of a successful co-CEO model in enterprise software. Aneel Bhusri and Dave Duffield ran Workday as co-CEOs for years. When Bhusri needed to focus more on product and strategy, Fernandez stepped into the co-CEO role, mirroring Klaviyo's proposed split: Bhusri on product and innovation, Fernandez on customer relationships and GTM. This arrangement proved effective, with Workday's revenue growing from approximately $700 million to over $6 billion during Fernandez's tenure.

Other notable successes include Netflix, where Reed Hastings brought in Ted Sarandos, then Greg Peters, as co-CEOs before transitioning to executive chairman without missing a beat. Similarly, Atlassian's co-founders Mike Cannon-Brookes and Scott Farquhar successfully operated as co-CEOs for two decades.

What distinguishes these successes from the failures?

Five Pillars for a Successful Co-CEO Structure

The rare instances where the co-CEO model thrives typically share five critical elements:

  1. Clear, Non-Overlapping Domains: A clean division of responsibilities, such as product versus GTM, is essential. Ambiguous ownership of "strategy" is a recipe for disaster. Klaviyo's approach—Bialecki owning product, engineering, design, and vision, while Fernandez handles GTM, operations, and G&A—establishes clear boundaries.
  2. Deep Personal Trust Built Over Time: While Bialecki and Fernandez have known each other for two years, with Fernandez serving on the board and sharing "lunches and dinners," this is merely a starting point. Successful co-CEO relationships, like those at Workday and Atlassian, often stem from decades of shared history and mutual respect. Bialecki acknowledges this, stating they developed "deep respect for each other's intensity and intellect."
  3. Ego Checked at the Door: This is arguably the most challenging factor. Both individuals, highly qualified to be sole CEOs, must genuinely believe the company benefits more from their combined leadership than from either operating alone. Fernandez himself emphasized this from his Workday experience: "Shared responsibility meant that ego had to be set aside."
  4. The Founder Stays Actively Engaged: The co-CEO model often fails when the founder uses it as a precursor to stepping away entirely. For Klaviyo's move to work, Bialecki must genuinely immerse himself in product and AI development, not merely transition to an executive chairman role in disguise.
  5. Complementary, Not Overlapping, Skills: The ideal pairing involves distinct skill sets. Bialecki, a technical founder who built the product, is complemented by Fernandez, an enterprise sales and operations executive who scaled a multi-billion-dollar company. Two product-focused CEOs or two sales-focused CEOs would likely lead to conflict.

The COO Alternative

Some founders attempt to address this challenge by appointing a Chief Operating Officer (COO) instead of a co-CEO, hoping to achieve similar benefits with a clearer hierarchical structure. However, as Reid Hoffman noted regarding his LinkedIn experience, "The kind of person who has the capacity to be a great leader usually wants to be CEO, not COO." Sheryl Sandberg's long tenure as COO at Facebook is an exception rather than the rule. To attract an executive of Fernandez's caliber—a former co-CEO of a $60 billion market cap company—the co-CEO title was likely a necessity, as a COO role might not have been sufficient.

Klaviyo's High-Conviction AI Bet

Bialecki's decision is not driven by burnout or board pressure; it's a proactive response to what he perceives as a pivotal "AI moment." He articulated, "We've hit a critical stretch where an agentic layer that can drive our B2C CRM is no longer a research project, it's production grade. We have the opportunity to make rapid progress, usher in this new era... and lead it." This is a founder's bet, requiring him to be in a building capacity, not a managing one.

Klaviyo has already launched Marketing Agent and Customer Agent, AI tools designed to autonomously build marketing plans and manage customer service, demonstrating their serious commitment to this vision.

This move by Klaviyo represents one of the highest-conviction co-CEO appointments seen recently. Fernandez has proven experience in this exact role and split of responsibilities at Workday. Bialecki is not retreating but leaning into a massive product bet amidst a generational AI shift. The company is operating from a position of strength—over $1.2 billion in revenue and 32% growth—not desperation or crisis. Furthermore, Bialecki and Fernandez have a two-year relationship foundation prior to this transition.

However, the risks remain significant. Decision-making can slow down with two leaders needing to align. External stakeholders, including investors, the press, and partners, may struggle to identify who is truly in charge. Personal conflicts, even minor ones, can escalate. And if the ambitious AI bet doesn't materialize, Bialecki's focus on product could be questioned as a diversion from overall business management.

While the co-CEO model succeeds in perhaps only 20% of cases, its success, as demonstrated by Workday, can be profound. Klaviyo appears to have assembled the right ingredients. The challenge now is to execute effectively.

The Dream Meets Reality

The aspiration of technical founders to offload operational burdens and return to building is common, yet often unfulfilled. Most public company CEOs firmly believe in the singular nature of their role. However, Klaviyo's approach to this co-CEO transition is notably well-structured:

  • They have brought in an executive with direct, successful experience in the exact co-CEO role.
  • Clear domain separation has been established.
  • A foundational relationship of trust exists between the leaders.
  • The founder remains fully engaged, albeit in a different, highly strategic part of the business.
  • The decision is made from a position of strength, not necessity.

For other founders contemplating a similar move, the critical self-assessment involves these five ingredients: clear domains, deep trust, ego management, sustained founder commitment, and truly complementary skills. If these conditions are not met, a COO or President title might be a safer alternative, or simply embracing the comprehensive nature of the CEO role. But with all five elements in place, a co-CEO structure, as Klaviyo is attempting, might indeed be a path to amplified success.

Related: Klaviyo's co-CEO announcement