The platform team should test a company's go-to-market during diligence the way it will support it afterward: through customer references, buyer-network checks and a read on the sales motion. Its findings sharpen the investment decision, speed up the deal, and become the first 90 days of the post-investment support plan.
I hear about this from both sides, and the two complaints don't match. Partners say bringing platform into a deal slows it down. Platform leads say they meet companies for the first time after the wire goes out, then spend a month learning what the deal team already knew. Both are right. The fix for both is a short, defined job for platform in diligence that runs alongside the deal and never in front of it.
Speed is the constraint. In a competitive round, the firm that moves fastest often wins. So platform's GTM work has to make the deal faster and better informed. If it adds a week, partners will stop inviting you, and they'd have a point.
Why platform belongs in GTM diligence
The platform team brings three things the deal team often doesn't have.
Buyers. If your firm keeps a buyer network, you can call people who look like the company's ideal customer and ask whether they'd buy. That's a better signal than any reference list the founder hands over.
Pattern memory. Your team has watched many portfolio companies hire their first sellers, fumble their first enterprise deal and rework their pricing. You know what "not ready yet" looks like at seed, and what it looks like at Series A.
Ownership of what comes next. If the firm invests, platform will support the company's GTM. Doing the check yourself means the first support plan comes from your own read instead of a secondhand summary.
There's a side effect partners like, too. A founder who spends 30 minutes with a platform lead asking sharp questions about their sales motion gets a preview of what the help will feel like. In a competitive deal, that preview counts.
Keep the boundary clear, though. The partner owns the investment decision. Platform contributes evidence and a view, in writing, by an agreed deadline.
A GTM readiness scorecard
Use the same scorecard on every deal, adjusted for stage. Don't judge a seed company against what you'd expect at Series B. Rate each dimension as not yet, emerging or repeatable, with one line of evidence.
| Dimension | What to look for | Evidence to ask for |
|---|---|---|
| Customer | A clear buyer, a clear user, the problem in their words | Customer list with titles, two or three customer calls |
| Sales motion | How deals close today, and who closes them | The last five closed deals, step by step |
| Repeatability | Whether anyone besides the founder has closed a deal | Deals closed by non-founders, if any |
| Sales cycle | Time from first meeting to signed contract | Dates from the CRM or the founder's notes |
| Pilots | Whether pilots convert to paid contracts | Pilot list with outcomes |
| Pricing | A logic the founder can explain, tied to value | Pricing page or recent proposals, recent discounts |
| Pipeline | Where new deals come from, and how concentrated that is | Pipeline by source |
| Team | Who sells today, and how they're paid | Org chart, comp plan for sales hires |
You won't fill every row at seed, and that's fine. The scorecard's job is to make the gaps visible. An empty repeatability row at seed is normal. At Series B it's a finding.
The team row connects to how the founder pays their first sellers. If the plan looks off, flag it now. The post on commission plans for first GTM hires covers what a sensible first plan tends to include.
Use your buyer network as a diligence tool
The most useful thing platform can add is a few calls with buyers who aren't customers yet. The founder picks the customer references. Nobody picks the buyers in your network for you.
Choose two or three people whose companies match the startup's ideal customer. Keep the ask short and honest, and protect the founder's confidentiality:
Quick question, and it's completely fine to say no. We're looking at a company that helps security teams automate vendor reviews. Is that a problem your team has today, and how do you handle it now? Fifteen minutes this week would help a lot. I won't share anything you say with the company without asking you first.
Three questions are enough on the call. Is this a problem you'd pay to fix this year? Who would sign the contract? What would make you say no? Write down the answers in their words, not yours.
Spend buyer goodwill carefully. Track who you've asked and how often, and thank them afterwards. If the deal closes and the company fits, those buyers are often your first intros (which is the whole point of the buyer network work in the first place).
Keep it fast: a 48-hour GTM check
Agree on a fixed shape with the partners, so platform never becomes the bottleneck:
- Hour 0. The deal team flags the company and shares the deck and data room.
- Day 1. Platform reviews the materials, drafts the scorecard, and books one founder call plus one or two buyer calls.
- Day 2. Platform sends a one-page memo.
The memo always has the same five parts:
- Read. One paragraph on GTM readiness for the company's stage.
- Strengths. Two or three, with evidence.
- Gaps. Two or three, each with what would close it.
- Questions for the founder. What the partner should ask before deciding.
- First 90 days. The support you'd start with if the firm invests.
If the buyer calls take longer than two days, send the memo anyway and add the calls when they land. A good memo on time beats a perfect one that arrives after the term sheet.
What GTM signals should platform check before an investment?
Check who buys and why, how deals are actually closed today, and whether that can repeat without the founder. Look at sales cycle length, champion and buyer titles, pilot-to-paid conversion, pricing logic, and pipeline sources. Call a few customers and a couple of buyers from your own network who didn't buy.
Some signals carry more weight than they look like they should:
- Who closed the last five deals. If every one needed the founder in the room, the motion isn't repeatable yet. That's fine at seed and worth a plan at Series A.
- Buyer titles across customers. The same title buying again and again points to a clear market. A different title every time suggests the company is still searching.
- Pilots that didn't convert. Ask why. The answers tell you more than the wins do.
- Discounts. Heavy discounting on recent deals can mean pricing doesn't match the value yet.
- Pipeline concentration. If most of the pipeline comes from one channel or one partner, name that risk.
Write each signal as evidence, not opinion. "Four of the last five deals were closed by the founder" is something a partner can weigh. "Sales feels founder-led" isn't.
How do you hand GTM diligence findings to the post-investment plan?
Turn every gap you found into a named action with an owner and a date, and share it with the founder in the first week after close. Keep the diligence notes, call summaries and buyer contacts attached to the company's record, so the person supporting the company starts with the context instead of re-asking.
The worst handoff is a memo in a deal folder nobody opens again. The person supporting the company asks the founder questions the founder already answered in diligence, and the founder notices.
A simple handoff looks like this:
- Gap → action → owner → date. "No repeatable sales motion" becomes "intro to two operators who built a first sales team, owned by the GTM lead, within 30 days."
- Buyer follow-ups. Any buyer who sounded interested gets a double opt-in intro after close, with their permission.
- A kickoff with the founder. Share the plan in the first week, ask what's missing, and cut whatever they don't want.
- A 90-day review. Check which gaps closed, and update the scorecard so you can see the change over time.
Diligence notes, call summaries and decks tend to scatter across inboxes once the deal closes. Put the plan where the post-close work already happens, next to the company's updates and decks, and give each item an owner and a date. Otherwise the plan you wrote in diligence never turns into work.