Andrew Crossley
    PRE-SEED & SEED · LIMITED RUNWAY

    Startup Product Consultant

    A startup product consultant helps pre-seed and seed founders make fast, evidence-based product decisions when there's no spare runway for mistakes. The job isn't a roadmap workshop — it's getting you to your first ten paying customers with the smallest amount of building possible, and stopping you from spending three months of your eighteen-month runway on the wrong feature. Founder and Chief Product Officer since 2020, currently doing exactly this at Co-Ride.

    WHO THIS IS FOR

    This is for you if any of this sounds familiar

    • You've got twelve to eighteen months of runway and every week spent building the wrong thing is a week you don't get back.
    • You're the founder doing product, sales, support and fundraising, and product decisions get made at midnight with no one to argue with.
    • You have a handful of enthusiastic early users but no one who has actually paid you money yet.
    • You keep adding scope to the MVP because every conversation surfaces a new 'must-have'.
    • An investor asked what evidence you have that people want this, and the honest answer was thinner than you'd like.
    • You're weighing whether to hire a first product manager but can't justify the salary or the three-month search yet.

    THE FRAMEWORK

    The Crossley Method: idea to first revenue in seven stages

    See the full method
    1. STAGE 1DiscoverWeek 1
    2. STAGE 2ValidateWeek 2
    3. STAGE 3PrototypeWeek 3
    4. STAGE 4Build MVPWeeks 3-4
    5. STAGE 5LaunchWeek 5
    6. STAGE 6First RevenueWeek 6
    7. STAGE 7ScaleOngoing

    WHAT THE WORK COVERS

    What a startup product consultant actually helps with pre-seed and seed

    Early-stage product work is not smaller-scale enterprise product work — it's a different job with different failure modes. The risk isn't building the wrong feature inside a good product; it's building a whole product nobody was asking for. This is where the framework is most different from later-stage advice.

    Ruthless validation

    Getting to a real answer, fast, on whether the problem is worth solving — through direct customer conversations, not surveys or investor enthusiasm, which are the two most common false signals at this stage.

    Minimum scope MVP

    Cutting the build down to the smallest thing that tests the core hypothesis, and defending that scope against the founder's own instinct to add 'just one more thing' before launch.

    First ten paying customers

    The transition from friendly pilot users to people who hand over a card. This is where pricing gets tested for real, and where most startups discover their actual value proposition isn't the one in the pitch deck.

    Founder-as-PM handover

    Building the habits and lightweight process that let the founder keep running product well without a consultant or a hire — interview cadence, a simple prioritisation rule, a roadmap that fits on one page.

    HOW IT RUNS

    How this runs when runway is the constraint

    1. Week 0

      Free 30-minute gut check

      What stage you're at, what evidence you have, what's eating your runway. I'll tell you directly if you need a consultant, a co-founder, or just three weeks of focus and no outside help at all.

    2. Week 1

      Evidence audit

      A hard look at what you actually know versus what you assume: customer conversations to date, any usage data, and whether your current build plan matches what customers have said or just what feels exciting to build.

    3. Weeks 2-3

      Scope cut and validation sprint

      A minimum scope MVP definition, plus a short structured round of customer conversations or a lightweight prototype test to close the biggest open question before a line of code gets written unnecessarily.

    4. Weeks 4-8

      Build and first revenue push

      Working alongside you and your engineers (or AI-assisted build tooling if you have no engineers yet) to ship the core loop, then straight into pricing and the conversations that get your first paying customers on the books.

    5. Exit

      Founder-as-PM playbook

      A one-page prioritisation framework, a customer interview cadence you can run alone, and an honest view on whether your next hire should be a product person or something else entirely.

    PRICING

    Pricing built for pre-seed runway

    Startup budgets are tight by design, and the pricing here reflects that a full-time hire isn't the alternative being weighed — the alternative is usually doing nothing and hoping.

    Strategy sprint

    £4,000

    Two weeks. Evidence audit, scope cut, and a validated MVP definition you can hand straight to an engineer or a build partner.

    MVP build

    £12,000-£25,000

    A working six-week MVP build, scoped tightly to the core hypothesis, using modern AI-assisted development to keep cost and timeline down without cutting corners on the parts that matter.

    Retainer, 1-2 days/week

    £4,000-£7,000/mo

    Ongoing product leadership through validation, first revenue and early scale, for founders who want a sparring partner rather than a one-off sprint.

    Building rather than hiring? Get a number in 60 seconds with the MVP cost calculator.

    COMPARISON

    Startup product consultant vs hiring a first product manager

    Most seed founders eventually ask whether they should just hire a PM instead. Here's the honest comparison, including where hiring wins.

    FactorStartup product consultantFirst product manager hire
    Cost to start£4,000 sprint or £4k-£7k/mo retainer£70,000-£100,000+ salary plus recruitment fees and time
    Time to startOne to two weeksTwo to four months of sourcing, interviewing and negotiating
    Experience levelSenior operator judgement from day one — has built and scaled beforeOften a first or second PM role, learning startup pace on the job
    Commitment if wrong30 days' notice, sprint ends cleanlyNotice period, severance risk, and a re-hire cycle you didn't budget for
    Founder relationshipWorks as a challenge partner to the founder, not a reportReports to the founder, which can mean less pushback on founder ideas
    Full-time presenceOne to two days a week — not in every daily conversationFull-time, embedded in every team conversation and Slack thread
    Right momentPre-validation through first revenue, or before you know what kind of PM you needAfter product-market fit, when there's a defined team and roadmap to own

    PROOF

    Built two startups from zero, not just advised them

    Co-Ride — pre-seed, present day

    Founder and Chief Product Officer since November 2025. Right now, building a community carpooling platform through the exact validate-to-first-revenue stages this page describes — living with the same runway pressure I'd be helping you navigate.

    Wocal — from zero to £2.7M pre-money

    Founder and CPO, 2020-2025. Started with nothing but a hospitality problem worth solving and took it to 300+ venues and a £2.7M pre-money valuation, learning the hard way which early decisions actually mattered and which were noise.

    Just Eat, 2021-2025

    Scaled marketplace experience that's useful precisely because it shows what 'done properly' looks like at scale — so I know which shortcuts are safe to take at pre-seed and which ones come back to bite you at seed.

    Sage and Echo-U

    Earlier enterprise SaaS and contact-centre roles, where I learned commercial discipline that most first-time founders haven't had the chance to learn yet — and which I bring to bear on your pricing and scope decisions.

    The founder-as-PM problem, honestly

    Almost every pre-seed founder is doing product management badly, not because they're bad at it, but because it's not actually their job and they're doing four other jobs at the same time. Product decisions get made in the ten minutes between a sales call and an investor email, under time pressure, usually alone. That's not a criticism — it's the structural reality of the stage — but it does explain why so many early products drift.

    The instinct is usually to fix this by hiring a product manager. At seed stage, before product-market fit, that's often the wrong first move: you don't yet know what kind of product person you need, a junior PM will defer to you rather than challenge you, and a senior one costs more than your monthly burn can absorb. What you actually need is a sparring partner a few hours a week who has done this before and will tell you when you're wrong.

    The goal of a good startup product consultant engagement isn't to take product off your plate permanently — it's to make you dramatically better at doing it yourself within a few months, with a simple framework you can run alone once the engagement ends. That's a different job from a permanent PM, and it should be priced and structured differently too.

    Why speed and evidence matter more than polish

    At pre-seed, the biggest risk isn't a bug or an ugly interface — it's spending three months building something well before you've confirmed anyone wants it. Polish is expensive and evidence is cheap, and most founders have that backwards because polish feels like progress and evidence-gathering feels like standing still.

    Real evidence at this stage is embarrassingly simple: a customer who says yes to a price, not a customer who says the idea sounds interesting. Investor enthusiasm, friendly feedback and LinkedIn engagement are not evidence — they cost the founder nothing to give and nothing to receive, so they carry no signal. The only evidence that reliably predicts a real business is someone parting with money, or time they can't get back, before the product is finished.

    This is why the first move in almost every engagement I run is a validation sprint before any serious build spend, even when the founder is confident they already know the answer. It's cheap insurance: a week or two of structured customer conversations costs a fraction of a wasted six-week MVP build, and it either confirms the plan or saves the runway for a better one.

    Getting to the first ten paying customers

    Ten paying customers sounds like a small number, and it is — but it's the number where a startup stops being a hypothesis and starts being a business. Ten people who've each handed over money tell you more about your pricing, your onboarding and your real value proposition than a hundred pilot users who are using the product for free.

    The path there is rarely the path in the original pitch deck. Almost every founder I've worked with discovered that customers valued a narrower slice of the product than expected, or valued it for a different reason than the one in the deck. The job at this stage is to notice that shift quickly and follow the evidence rather than defend the original plan out of sunk cost.

    Pricing gets tested for real here too. Free pilots tell you nothing about willingness to pay; only asking for money does. I push founders to charge something, even a modest amount, from customer one — because the conversation about price is where you learn what you actually built, and that lesson is worth more than the revenue itself at this stage.

    What good looks like at this stage

    • A one-page roadmap you could explain to an investor in ninety seconds, not a twelve-tab spreadsheet.
    • At least ten structured customer conversations before any significant build spend, with notes, not just memory.
    • An MVP scoped down by at least half from the founder's first instinct — the cut is where the discipline lives.
    • A price on the product from day one, even if it changes twice in the first quarter.
    • A founder who can run a simple weekly prioritisation call alone by the time the engagement ends.

    FREQUENTLY ASKED

    Startup product consultant questions

    What does a startup product consultant do differently from a general product consultant?
    A startup product consultant is calibrated for limited runway and high uncertainty — the work prioritises speed and evidence over polish and process, and the deliverables are built to be run by a founder alone afterwards, not to require an ongoing team.
    Should a pre-seed founder hire a product manager or a consultant?
    Usually a consultant first. Before product-market fit, you don't yet know what kind of permanent product hire you need, and a full-time PM salary is hard to justify against runway. A consultant gives you senior judgement on a flexible basis until the business is ready for a permanent hire.
    How fast can a startup product consultant help me validate an idea?
    A focused validation sprint — structured customer conversations plus a scoped hypothesis test — typically takes one to two weeks. It won't give you certainty, but it will give you meaningfully better evidence than founder instinct alone, fast enough not to burn runway waiting for it.
    How much does a startup product consultant cost?
    A fixed-scope strategy sprint is £4,000. A full MVP build runs £12,000 to £25,000 depending on scope, typically delivered over six weeks. Ongoing retainers for one to two days a week run £4,000 to £7,000 a month, well below the cost of a permanent product hire.
    What counts as real evidence that customers want my product?
    Someone paying money, or committing real time they can't get back, before the product is finished. Positive feedback, investor interest and sign-ups to a waitlist are all useful but weak signals — they cost the person giving them nothing, so they don't reliably predict a real business.
    Can you help me build the MVP as well as plan it?
    Yes. I work hands-on with your engineers, or use modern AI-assisted development tooling directly, to get a scoped MVP live in around six weeks, rather than handing you a specification document and leaving the hardest part to you.
    How do I know if I'm ready for a startup product consultant versus just needing to focus?
    If you've never spoken to more than a handful of customers, or you keep adding scope before shipping anything, the honest answer might be discipline rather than outside help. I'll tell you that directly on the first call if it's true — it happens more often than you'd think.
    What happens to product management after the engagement ends?
    You keep running it yourself, using the one-page roadmap, the interview cadence and the prioritisation rule built during the engagement. The goal is a founder who's meaningfully better at this by the end, not a founder who's dependent on ongoing consulting.

    GET IN TOUCH

    Tell me what stage you're at and what's eating your runway

    A few lines about the problem and your runway is enough to start. I reply within 48 hours, and I'll say directly if a consultant isn't what you need yet.

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