Choosing the Right Partnership Model
Not all partnerships are created equal, and the structure you choose should reflect the specific contributions, risks, and goals of each partner. For executive side projects, four partnership models are most common: the equity partnership, the revenue-sharing partnership, the venture studio model, and the advisory-plus-equity model. Each has distinct advantages and risks that depend on your situation.
The equity partnership is the traditional co-founder model: two or more partners share ownership, responsibilities, and upside. This works well when both partners are contributing significant and ongoing effort—for example, one partner contributes industry expertise and customer relationships while the other contributes technical development and product management. Equity splits in executive side projects typically favor the domain expert (60/40 or 55/45) because the business idea, market access, and customer relationships are the hardest assets to replicate.
The revenue-sharing model is ideal when one partner wants reduced upfront costs in exchange for sharing future revenue. A technical partner might agree to build the MVP at a reduced rate in exchange for 10 to 20 percent of revenue for the first three to five years. This model aligns incentives without permanently diluting ownership. Companies like Sizzle Ventures offer venture studio partnership models that combine development services with strategic co-building, creating a collaborative relationship that goes beyond a typical client-vendor engagement.
The Operating Agreement: Non-Negotiable Elements
Every partnership must have a written operating agreement, and for executive side projects, certain elements are non-negotiable. First, define decision-making authority clearly. Who has final say on product decisions? On pricing? On hiring? On taking investment? Ambiguity in decision rights is the number one cause of partnership conflict. For most executive side projects, the domain expert should have final authority on business strategy and customer-facing decisions, while the technical partner controls technical architecture and development process.
Second, define the vesting schedule. Even in a two-person partnership, equity should vest over time—typically four years with a one-year cliff. Vesting protects both partners: if one partner loses interest or fails to deliver after six months, they do not walk away with half the company. The cliff ensures a minimum commitment before any equity is earned. This is standard practice in Silicon Valley and should be standard practice for executive side projects.
Third, define the exit provisions. What happens if one partner wants out? What happens if the partners disagree on whether to sell the company? Include a buy-sell agreement (often called a "shotgun clause") that provides a clear mechanism for one partner to buy out the other at a fair valuation. Define the valuation methodology in advance—revenue multiple, independent appraisal, or formula-based—so there is no argument about price when the time comes.
Partner Selection: What to Look For and What to Avoid
The most important factor in partner selection is complementary skills with shared values. You want a partner who brings capabilities you lack, shares your work ethic and integrity standards, and has compatible expectations about the venture's trajectory. The worst partnerships are between two people with the same skills, because they compete on every decision rather than dividing responsibilities based on expertise.
For executive side projects specifically, avoid partnering with anyone at your current company. This creates conflicts of interest, complicates IP ownership, and puts both careers at risk if the partnership sours. Also avoid partnering with close friends or family members unless you have successfully navigated a business relationship with them before. The dynamic of friendship is fundamentally different from the dynamic of co-ownership, and the transition destroys more relationships than it strengthens.
When evaluating a potential technical partner or development studio, assess three things: their track record with similar projects, their communication style and responsiveness, and their financial stability. A partner who disappears for a week mid-build, misses deadlines without explanation, or is juggling five other projects simultaneously will create more stress than value. Check references, review their portfolio, and start with a small paid engagement before committing to a full partnership.
When to Partner with a Venture Studio
Venture studios occupy a unique position in the partnership landscape. Unlike a traditional development agency that builds what you specify and delivers a finished product, a venture studio acts as a strategic co-builder. They contribute to product strategy, challenge your assumptions, bring experience from dozens of previous ventures, and often maintain an ongoing relationship as the product scales.
The venture studio model is particularly well-suited for executive side projects because it addresses the two biggest constraints executives face: limited time and the need for high-quality execution. A venture studio like Sizzle Ventures manages the entire product lifecycle—from validation through launch and beyond—while the executive contributes domain expertise, customer relationships, and strategic direction. The time commitment for the executive is measured in hours per week, not hours per day.
The financial structure of venture studio partnerships varies. Some studios charge a fixed project fee. Others blend a reduced fee with a small equity stake or revenue share, aligning their financial incentives with the product's success. The right structure depends on your budget, your risk tolerance, and the level of ongoing involvement you want from the studio. If you are considering the venture studio path for your side project, start a conversation with Sizzle to explore which engagement model aligns with your goals and constraints.
Ready to Build Your Side Project?
Executives across every industry are turning side project ideas into real products—without pulling a single engineer off their core team. The key is working with a partner who understands both the technical execution and the strategic context of building alongside a day job.
Sizzle Ventures helps executives go from idea to launched product in as little as 90 days. Our MVP Sprint is built specifically for leaders who need speed without sacrificing quality—and without touching their internal dev team.
Ready to explore what's possible? Start a conversation with Sizzle about bringing your side project to life.