Scaling Your Co-Founder Relationship: Rituals, Decision Rights, and Trust Lessons from Labelbox

I’ve learned that a startup’s trajectory often mirrors the strength of its co-founder relationship. With that lens, I sat down to unpack how to scale trust, decision-making, and speed between co-founders as the company itself scales. Our guests are Manu Sharma and Brian Rieger, co-founders of Labelbox. In this interview, I take a microscope to their co-founder DNA, exploring the ins and outs of how they’ve made the relationship work over the years. We traced how Manu and Brian came together as co-founders and landed on the idea for Labelbox. That origin story matters: it reveals the early signals of shared conviction, complementary experience, and a clear problem thesis—foundations I look for when evaluating co-founder fit in any startup. Before writing a line of code, they intentionally aligned their skillsets, values and responsibilities. I emphasize this step in my own product management leadership practice: make the invisible explicit. Define roles, boundaries, and how decisions get made while the stakes are low, so you can move fast when the stakes are high. As the company grows, their rituals for spending valuable time together keep the relationship durable. They use thought-starter questions for deep discussions and even benefit from sharing an executive coach. I’ve seen this playbook consistently reduce friction: structured prompts surface misalignments early, while an external coach creates a safe container to reset, recommit, and keep momentum. We also dug into how they run the executive team at scale and sketch out decision rights. Clear decision rights accelerate execution, prevent rework, and protect the co-founders’ relationship from getting pulled into every operational knot. In my experience, codifying who decides, who contributes, and how dissent is handled is one of the fastest ways to boost operating cadence without sacrificing trust. Manu and Brian both offer practical advice to other founders—whether you’re in the early stages of looking for a co-founder or aiming to add a little magic to an existing partnership. If you’re building, apply their lessons: align on values early, institutionalize rituals, use an executive coach, and be explicit about decision rights. These are the simple, scalable mechanisms that preserve focus, speed, and resilience as you pursue product-market fit and scale your executive team. You can follow Manu at @manuaero and Brian at @RiegerB on Twitter.

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