In a non-control deal, an investor cannot fire management. Therefore, the primary diligence focus must shift from the business itself to the founder's character and the potential for a strong partnership, as this relationship is the ultimate determinant of success.

To vet potential investors or acquirers, founders should ask them to articulate their vision for the startup's next five years. Hearing their story told through the buyer's eyes reveals the depth of their strategic thinking and helps assess whether their vision aligns with the founder's, ensuring a better post-transaction fit.

To ensure robust decision-making, Eclipse requires that if a partner feels strongly against a potential investment, they must join the deal team alongside the champions. This forces a direct confrontation of the risks and ensures that by the time an investment is made, all major concerns have been addressed.

David Cohen of Techstars advises founders to request references from a VC's failed investments. This reveals how an investor behaves during difficult times, providing a more honest assessment of their character and support level than speaking only with successful founders.

Technical competence is the easiest part of a technical co-founder to evaluate. The real risks lie in misaligned goals (lifestyle vs. unicorn), personality clashes, and incompatible work styles. Prioritize assessing these crucial "human" factors first.

Instead of walking into a pitch unprepared, Reid Hoffman advises founders to use large language models to pre-emptively critique their business idea. Prompting an AI to act as a skeptical VC helps founders anticipate tough questions and strengthen their narrative before meeting real investors.

Rather than imposing processes after investing, VCs can use frameworks like the "sales sprint" as a pre-investment litmus test. Sharing the approach and observing the founder's reaction reveals their mindset. A founder who is eager to adopt a disciplined, customer-centric process is a stronger bet than one who must be forced into it.

Before an LOI, share your high-level vision, then have the target's founders pitch back their own 6- and 12-month post-acquisition roadmap. This pre-commitment exercise reveals true alignment and integration potential far more effectively than traditional diligence, creating a joint vision early on.

Don't let the cofounder dynamic run on autopilot. Proactively establish "vows"—commitments on decision-making and conflict resolution. Then, create a regular relationship rhythm for check-ins. This practice of stepping "onto the balcony" to observe the relationship is crucial for long-term health and success.