A SaaS proof of concept is supposed to compress the gap between a buyer’s scepticism and a signed contract. In practice, it is where a large share of pipeline quietly disappears. The technical demo goes well, the champion is enthusiastic, and then the deal drifts for eight weeks while nobody on the vendor side can say who is actually responsible for moving it forward. This is not usually a product problem. It is an ownership problem, and it shows up in three specific places: the handoff between the account executive (AE), the solutions engineer (SE) and the technical account manager (TAM); the point where security, legal and procurement enter the process; and the moment executive sponsors are supposed to weigh in but never do.
This post breaks down each of those failure points and sets out the mechanisms (roles, documents, CRM gates) that keep a POC moving instead of stalling.
Why POCs Stall When No One Owns Them
The typical POC has at least three people on the vendor side with some claim to ownership: the AE, who is chasing the commercial outcome; the SE, who built and is running the technical environment; and, on longer or more complex evaluations, a TAM who is meant to be the customer’s point of contact once the deal closes. Each of them can reasonably assume someone else is driving the next step. The AE assumes the SE is chasing the buyer’s technical stakeholder for sign off. The SE assumes the AE is handling the commercial conversation and will flag if the buyer goes quiet. Nobody is checking whether the buyer’s security team has even opened the compliance documentation that was sent three weeks ago.
The buyer experiences this as inconsistency rather than as an internal process gap. They get a confident technical answer from the SE, a vague answer on timeline from the AE, and no answer at all on the legal questions their own procurement team raised. From the outside, that reads as a vendor that has not thought through its own delivery, regardless of how good the underlying product is.
The structural fix is to treat every POC as a project with named owners for each deliverable, not a sequence of calls that different people happen to attend. That means writing down, before the first technical session, who owns the success criteria document, who owns the compliance packet, who owns the executive relationship, and who is responsible for noticing if any of those threads goes quiet for more than a few days.
Defining Roles Before the POC Kicks Off
The AE, SE and TAM Split
A workable split looks like this. The AE owns the commercial thread: budget confirmation, contract terms, procurement introductions and the executive relationship. The SE owns technical validation: configuring the environment, agreeing success criteria with the buyer’s technical team, and running the sessions that prove the product does what was promised. The TAM, where one exists, owns continuity into onboarding and should be introduced during the POC rather than after signature, so the buyer meets the person who will actually support them before they have committed to anything.
This split fails when any one role tries to cover for a gap in another without saying so. An SE who quietly answers pricing questions because the AE is slow to respond is solving a short term problem while hiding a structural one: the buyer now expects technical staff to answer commercial questions, and the AE has lost visibility into a conversation that affects the deal.
Putting Ownership in Writing
Verbal agreement on roles evaporates within a week. A short mutual success plan, shared with the buyer at kickoff, should name an owner and a target date for each milestone: environment access, success criteria sign off, security questionnaire submission, executive briefing, and the final demo. This is not a marketing document; it is a working reference that both sides can point to when a step is late.
RevOps can operationalise this by making the plan a required attachment before a deal is allowed to move to the next CRM stage. Platforms such as HubSpot expose deal pipeline stages and required properties through their API, which makes it straightforward to build a gate that blocks stage progression until the success plan field is populated (HubSpot developer documentation). The mechanism matters more than the specific tool: a stage gate turns “we should really write this down” into something the CRM enforces rather than something that depends on someone remembering.
Bringing Security, Legal and Procurement in Early
A common pattern is that security and legal review only start once the technical POC has already succeeded, on the assumption that there is no point doing paperwork for a deal that might not progress. This backfires because those reviews are usually the longest single component of the sales cycle, and starting them late adds their full duration on top of everything else, at the exact point when the buyer’s enthusiasm is highest and most perishable.
The alternative is to send a standard compliance package on day one of the POC, before technical validation has even started: a security overview, a draft data processing agreement, a sub processor list and answers to the questions that come up most often. None of this depends on the outcome of the technical evaluation, so there is no reason to wait. Where the product and the buyer’s use case involve any processing of personal data, both sides benefit from starting that conversation against a clear reference point rather than negotiating terms from scratch partway through the deal; the UK Information Commissioner’s Office publishes general guidance for organisations on data processing obligations that is a reasonable shared reference for this kind of discussion (ICO guidance for organisations).
Framing matters here too. A buyer who is told at kickoff, “our standard security review typically takes two to three weeks once your team has the documentation, so let’s start that in parallel with the technical validation,” experiences a predictable process. A buyer who only discovers the review exists after they have mentally already bought the product experiences an unplanned delay, and unplanned delays are where champions lose confidence in their own recommendation.
Managing the AE to SE to TAM Handoff
Two handoffs cause most of the damage in a POC: the moment an AE’s commercial pitch meets the SE’s technical build, and the moment a successful POC transitions to a TAM for onboarding. Both fail for a similar reason: information about what was actually promised does not travel with the deal.
The AE to SE handoff breaks when the AE, in the interest of momentum, describes a capability in terms broader than what the demo environment can actually show. The SE then either has to quietly narrow the scope mid POC, which the buyer notices, or scramble to build something that was never planned. The fix here is a joint scoping call, before any technical work starts, where the AE, the SE and the buyer’s technical contact agree in writing exactly what the demo environment will be configured to prove. If a claim is not in that document, the SE has a legitimate basis to push back on it before the buyer ever sees the gap, rather than discovering the mismatch live.
The SE to TAM handoff breaks differently: it usually happens too late and too abruptly. A TAM introduced by email after the contract is signed, with no prior context, reads to the buyer as a downgrade in attention right after they have committed. Introducing the TAM at the final demo, so they hear the success criteria confirmed directly rather than second hand, gives the buyer visible continuity into onboarding rather than a cold handover.
None of this requires new headcount. It requires the overlap between roles to be scheduled deliberately rather than left to chance, and RevOps can support that with shared meeting agendas and CRM activity logs that make the history of a deal visible to whoever picks it up next, rather than relying on one person’s memory of a call from three weeks earlier.
Getting Executive Sponsors Aligned Before Signature
A technically flawless POC can still fail commercially if the person who ultimately approves the budget was never engaged. Practitioners evaluate a product on whether it solves their day to day problem; the executive who signs off usually evaluates it on cost, risk and strategic fit, and those two conversations do not automatically reconcile themselves.
The failure mode is familiar: a champion is fully bought in, the POC is glowing, and then the deal sits for a month because the actual budget holder has not been part of a single conversation and now needs to be convinced from scratch, at the exact moment the champion expected to be closing. Mapping who the economic buyer is should happen during POC scoping, not after the technical evaluation is complete. That means asking the champion directly who signs off on spend of this size, and building at least one executive touchpoint into the plan, positioned around the midpoint of the POC rather than at the end, focused on cost and risk rather than a repeat of the technical demo.
RevOps has a role here too: deal review dashboards that flag an opportunity above a certain size with no identified economic buyer give managers a chance to intervene while there is still time to schedule that conversation, rather than finding out the gap exists when the deal has already stalled.
Setting Exit Criteria That Prevent Ambiguous Endings
POCs are also lost to a quieter failure: they simply never end. Without an agreed definition of success, a technically fine evaluation can drift into an indefinite extension because nobody can point to a document and say the criteria have been met, or that they have not. The buyer keeps using the trial environment, the AE keeps reporting the deal as active, and three months later it is unclear whether this is a live opportunity or a very slow no.
Exit criteria need to be specific and written down at kickoff, not inferred from a general sense that things are going well. Each criterion should have a measurable threshold, a named owner responsible for confirming whether it was met, and a date by which the assessment happens. Crucially, the plan should specify what happens in both outcomes: a pass moves directly into a defined next commercial step, and a fail ends the evaluation with a documented reason rather than a quiet lapse into inactivity. Sales platforms such as Salesforce support this with configurable opportunity stage validation rules that can require these fields before a deal can advance (Salesforce Help), and workflow automation tools including n8n can be used to trigger reminders when a criterion’s review date passes without an update (n8n documentation).
This closes the loop back to the ownership problem the whole POC started with: a plan with named owners and dates for each milestone, reviewed against explicit pass or fail criteria, removes the ambiguity that lets a deal fade rather than close or die on a defined date.
Frequently Asked Questions
Who should own a SaaS POC, the AE or the SE?
Neither on their own. The AE owns the commercial thread (budget, timeline and contract terms), while the SE owns technical validation (environment build, success criteria and demo delivery). Split ownership by function and put it in writing rather than defaulting to whoever is most senior on the call.
How early should security, legal and procurement get involved in a POC?
At kickoff, not after the technical proof is done. Sending a security package (a SOC 2 summary, a draft DPA and a sub processor list) on day one lets the buyer’s security and legal teams start their review in parallel with technical validation instead of adding weeks to the end of the cycle.
What is a mutual success plan, and does every POC need one?
It is a short written document naming an owner and a date for each POC milestone, agreed with the buyer at kickoff. Any POC running longer than a couple of weeks or involving more than one buyer stakeholder benefits from one, because it replaces memory and scattered emails with a single point of reference.
How do you stop an AE overselling during a POC?
Hold a joint scoping call before the POC starts where the AE, the SE and the buyer agree the exact success criteria the demo environment will be configured to prove. If a capability is not in that written scope, the SE has grounds to push back on it before the buyer ever sees the gap.
What should happen if a POC ends without a clear pass or fail?
That outcome should not be possible if exit criteria were set at kickoff. Each criterion should have a threshold, an owner and an expiry date, so the POC produces either a documented pass that moves into contracting or a documented fail that ends the evaluation, rather than an indefinite extension.
Related Reading
For more on this, see more RevOps strategy posts, including Modern Sales Qualification for SaaS: BANT vs MEDDIC & RevOps Strategies, Adapting to the Future: Leveraging Mailforge.ai to Navigate Google’s 2024 Email Marketing Revolution, and CRM Data Hygiene Strategies for B2B Sales Ops Success.
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