The Proof of Value Isn’t For Your Buyer

The demo was, by any reasonable measure, excellent.

Marcus had spent the weekend rebuilding the environment from scratch after the original instance decided to corrupt itself at 4pm on Friday - because of course it did. He’d customised the workflows to mirror the buyer’s actual process. He’d even added their logo to the dashboard, which felt a bit much, but the AE had insisted. The champion, a senior director of engineering called Priya, was visibly impressed. She asked sharp questions. Marcus gave sharp answers. The AE sent a Slack message afterwards that was mostly emoji and celebratory.

Three weeks later, silence. Priya had gone quiet. Procurement surfaced with a request for “additional validation.” A new stakeholder appeared - someone from finance who hadn’t attended any previous call - and wanted to see the integration capabilities demonstrated again. From scratch. In a different context. With different data.

Marcus was asked to build another demo.

This feels like a story about why demos fail. It isn’t. The demo was never the problem. Marcus gave the buyer exactly what they asked for, executed it brilliantly, and still ended up back at square one. That was the mistake - not the execution, but the entire framing of what the engagement was supposed to achieve.

What is a Proof of Value, and how is it different from a POC?

A Proof of Value is a structured engagement that connects your solution’s capabilities directly to a buyer’s measurable business outcomes - not just their technical requirements. A POC proves the product works. A PoV proves the product matters. And that distinction, which sounds like semantics, changes almost everything about how the deal unfolds.

Most SEs have run POCs. They know the shape of them: the buyer’s technical team defines a set of criteria, you stand up an environment, you tick boxes. API connectivity, SSO support, data export formats, maybe some performance benchmarks. It’s comfortable work for technically strong people, and there’s genuine satisfaction in nailing every requirement.

But POCs are buyer-driven in a way that sounds like a good thing and frequently isn’t. “Can your tool do X?” is a question that keeps the SE in a reactive position. A PoV flips it: “What is X worth to your business, and can we prove that together?” That reframing moves the SE from order-taker to someone who’s actually shaping the evaluation.Here’s what this looks like in practice. An SE at a mid-market SaaS company gets asked to run a PoC over several weeks. The buyer’s IT team owns the success criteria. The SE nails every one of them - connectivity, authentication, export formats, the lot. The POC report is thorough and technically impeccable. It lands on the desk of the VP of Operations, who owns the budget and has never once been involved in defining what “success” means. She sees checkboxes. She does not see her problems. The deal enters “committee review,” which is corporate for “we’ll get back to you in a timeframe that is technically infinite.”

Contrast that with a PoV approach. Before anything gets stood up, the SE facilitates a conversation with both IT and the VP of Ops. What does success look like in hours saved? In error rates reduced? In revenue protected? The engagement gets designed around those definitions. The final readout speaks the VP’s language, because it was built from hers.

Most organisations use POC and PoV interchangeably, which is itself a symptom of the problem. When there’s no distinction in language, there’s no distinction in execution. And when there’s no distinction in execution, every evaluation defaults to the path of least resistance: technical checkboxes, judged by people who don’t control the budget.

Why do technically great demos still lose deals?

Because they answer the wrong question. Buyers don’t need to know your product works - they need to believe it will work for them, in their environment, against their specific problem. A demo proves capability. A PoV proves relevance. Without relevance, capability is just noise.

There’s an assumption most SEs carry, and it’s understandable because it’s partially true: better demos lead to better outcomes. Bad demos lose deals. But there’s a ceiling on demo effectiveness that’s lower than most of us think. Once a demo is good enough to establish credibility - and that bar is genuinely not that high - additional technical polish doesn’t move the needle much. What moves it is whether the buyer can see themselves in the story you’re telling.The presales community has an informal term for what happens when this gap gets ignored: demo theatre. Both sides are performing. The SE demonstrates features with practised fluency. The buyer asks questions that sound engaged. Everyone leaves feeling productive. And no real decision-making information was exchanged. It’s a ritual that mimics progress without creating any.

A PoV is the antidote to demo theatre because it requires the buyer to have skin in the game. They have to define success criteria in terms that matter to their business. They have to provide access to real data or real workflows - not sanitised test scenarios. They have to show up to review sessions with an opinion, not just polite attention.

This co-investment isn’t just strategically useful. It’s psychologically significant. Research in behavioural economics suggests that people assign disproportionately more value to things they’ve helped create. When buyers participate in building the proof, they own the outcome. They become advocates for the conclusion because it’s partly their conclusion. That’s not manipulation - it’s alignment. But it only happens when the buyer is genuinely involved in the work, not just watching a performance from a conference room with oddly aggressive abstract art on the walls.

The frustrating thing - and experienced SEs will recognise this immediately - is that the pattern of impressive demos followed by stalled deals isn’t a beginner’s mistake. It’s a structural problem. You can be exceptional at your craft and still lose because the engagement was designed to prove the wrong thing to the wrong person.

How does a Proof of Value change the presales role in a deal?

A PoV repositions the SE from technical validator to deal architect. Instead of responding to buyer requests, the SE co-designs the evaluation framework. This gives presales professionals direct influence over what “winning” looks like - and makes them indispensable to the outcome, not just the process.

And this is where the real point of the article surfaces, which is probably not where you expected it.

The PoV is not primarily a tool to help buyers make decisions. It is a tool that gives presales professionals structural authority in a deal. Most SE roles are reactive by design. Discovery happens, requirements get gathered, and the SE is handed a scope and asked to execute. You’re briefed before calls. You’re asked to “build a demo for X feature.” You’re the person who makes the technology comprehensible, and then you leave the room while the adults discuss pricing.

A PoV breaks this pattern because it requires the SE to lead a structured engagement with defined phases, milestones, and success metrics. That leadership role isn’t optional - it’s built into the format. You can’t run a PoV from the back seat.The practical shift in deal dynamics is significant. In a standard evaluation, the sales rep owns the relationship and the SE owns the technical content. In a PoV, the SE owns the evaluation design - which means the SE is now co-owner of the deal strategy. Instead of being briefed before a call, you’re co-designing the agenda. Instead of being asked “can you demo this feature,” you’re asking “what business outcome are we trying to validate in this phase?”

I watched this shift happen with a colleague - a senior SE called David who’d been running POCs for years and was quietly furious about being treated as a demo resource on deals he understood better than the reps running them. He started insisting on PoV structures for any deal above a certain threshold. Not as a suggestion. As a requirement. The first few conversations with sales were uncomfortable. But once a PoV-structured deal closed faster and at higher ACV than comparable deals that quarter, the dynamic changed permanently. David wasn’t “the demo person” anymore. He was the person who could make the evaluation land with the economic buyer. That’s a fundamentally different kind of internal credibility.

This is how SEs escape the demo jockey trap - not by getting better at demos, but by changing what the engagement is.

What makes a Proof of Value fail - and who is actually responsible?

Most PoVs fail not because the product underperforms, but because success was never clearly defined before the engagement began. When success criteria are vague, the buyer can always find a reason to delay. And the SE who accepts a vague brief isn’t being helpful - they’re absorbing risk that belongs to the deal, not to them.

This is the uncomfortable part. SEs are often complicit in their own PoV failures. The instinct to be accommodating - to say yes, to start quickly, to avoid friction with the buyer or the sales rep - is exactly what sets up a failed engagement. Presales professionals are typically selected and rewarded for responsiveness and technical depth. Not for the ability to push back on poorly scoped requests. Not for saying “we’re not ready to start this yet.”

A PoV requires the SE to have a hard conversation before anything gets built: “Before we begin, we need to agree on what success looks like in measurable terms. And the person who controls the budget needs to be in that conversation.” That conversation is uncomfortable. It can feel like you’re slowing the deal down. The AE might not love it. The buyer’s technical team might find it unnecessary - they just want to get hands on the product.

But that discomfort is the point. It’s the filter. A buyer who won’t define success criteria in business terms is a buyer who can’t close internally. A deal where the economic buyer won’t participate in scoping the evaluation is a deal that will stall at exactly the moment it matters most. The PoV doesn’t just prove value to the buyer - it proves deal quality to you.

Every PoV that gets launched without clear, measurable, business-aligned success criteria is a PoV that the SE will eventually have to explain away in a pipeline review. And by then, the narrative has already been written: the technology didn’t land. Not: the engagement was never properly scoped. Not: nobody asked the VP what she actually cared about.

The SE absorbs the blame because the SE was the last person touching the deal before it stalled. A well-structured PoV makes that outcome dramatically less likely - not because it guarantees a win, but because it forces the conditions for a real decision to exist before anyone spends significant time building an environment over a weekend.

Marcus, from the beginning of this piece, was brilliant at his job. He just didn’t realise that his job - the one that would actually advance his career and protect his time - wasn’t to give the buyer what they asked for. It was to make sure they were asking for the right thing.