---
title: "Hard-Won Lessons in Investing | Petri Lehmuskoski | Neuvottelija 407"
titleOriginal: "Karvaat opit sijoittamisesta | Petri Lehmuskoski | Neuvottelija 407"
episodeNumber: "407"
guest: "Petri Lehmuskoski"
datePublished: 2026-09-10
duration: "1:03:06"
youtube: "https://www.youtube.com/watch?v=tdXUiXNsUn8"
originalLanguage: "fi"
topics: ["investing_markets","ma_exits","saas_software"]
subtitleMethod: "none"
provenance: "Owner page assembled from YouTube metadata, the neuvottelija.fi episode record and a MacWhisper transcription of the Finnish audio. The chapter marks are the publisher's own list of 68 chapters as released with the video, each verified to fall within ten seconds of a real transcript cue, and translated into English here. No English caption track was produced, so no transcript is published here. The transcription contains no gaps. It carries no speaker labels, but with a single guest the speakers are reliably distinguishable. The book's English terms (buyer proof, value proof, scaling proof, proof stack) appear in the transcript in numerous mangled forms and were normalised to the book's own usage in the cleaned Finnish cue file; spoken names that could not be verified were not guessed and are not repeated here."
fiCanonical: "https://www.neuvottelija.fi/fi/episodes/849-karvaat-opit-sijoittamisesta-petri-lehmuskoski-neuvottelija"
canonical: https://www.neuvottelija.com/podcast/episodes/ep407-karvaat-opit-sijoittamisesta-petri-lehmuskoski/
---
# Hard-Won Lessons in Investing | Petri Lehmuskoski | Neuvottelija 407

English subtitles are not available on this page. This is an episode summary, not a curated transcript.

## Chapters

- [00:00](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=0s) The guest introduces himself, and Gorilla Capital's third fund
- [01:09](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=69s) The book More Scars Than Trophies
- [01:51](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=111s) Product market fit is an undefined term
- [02:53](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=173s) Four proof stacks in place of fit
- [04:15](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=255s) Buyer proof and value proof, separately
- [04:48](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=288s) The buyer has to put something at stake
- [05:56](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=356s) A user does not make an economic decision
- [06:20](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=380s) The purchase funnel as theatre
- [07:35](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=455s) The customer's hidden costs and switching costs
- [08:23](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=503s) Why large system projects fail
- [09:18](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=558s) SaaS and the friction of adoption
- [10:29](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=629s) Measuring turns development into a loop
- [10:50](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=650s) Evidence decays over time
- [11:14](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=674s) Autovex as an example of genuine pain
- [12:03](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=723s) Scaling, and the foreign acquirer
- [12:36](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=756s) An exit does not happen by accident
- [13:08](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=788s) The scaling stage as an efficiency measure
- [14:18](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=858s) Going the wrong way for too long
- [14:38](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=878s) Throwing money at the wrong paradigm
- [15:17](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=917s) An investor's advice at the wrong stage
- [15:46](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=946s) Hull speed as a boat metaphor
- [16:53](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1013s) A company's hull speed as the product of its founders
- [17:42](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1062s) Hiring salespeople without evidence
- [18:16](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1096s) The founding team's chemistry as part of hull speed
- [19:20](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1160s) Why right decisions arrive too early
- [20:24](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1224s) Evidence before irreversible decisions
- [21:01](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1261s) Conscious bets
- [21:36](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1296s) The cycle of buyer proof and value proof
- [22:20](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1340s) Revenue as a poor measure
- [23:46](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1426s) Growth and scaling are not the same thing
- [24:45](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1485s) When to start thinking about the exit
- [25:29](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1529s) Amateur notions of the exit and the dream acquirer
- [26:22](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1582s) A useful company or a necessary one
- [27:36](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1656s) The proof stack as a board tool
- [28:43](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1723s) The risk of micromanagement
- [29:42](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1782s) The relationship between board, owner and management
- [30:57](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1857s) A shared language between founder and investor
- [32:32](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1952s) The startup's annual calendar
- [33:00](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=1980s) How an angel evaluates a company with no evidence
- [33:55](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2035s) When money helps and when it does not
- [34:49](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2089s) Evidence decays and the world changes
- [35:52](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2152s) Taking risk in a competitive environment
- [36:16](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2176s) Why customer interviews are not enough
- [37:08](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2228s) The podcast's revenue model as an example
- [38:22](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2302s) How AI changes the evidence problem
- [39:24](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2364s) AI scams in investor material
- [39:59](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2399s) Building a prototype is no longer a gate
- [40:21](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2421s) The customer can replace the product themselves
- [41:09](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2469s) What a founder must not outsource
- [41:30](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2490s) A salesperson only asks what they know to ask
- [42:09](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2529s) Unfair advantage comes from the buyer's experience
- [44:23](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2663s) An investment banker's real pain point
- [45:17](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2717s) Better data does not produce more deals
- [46:25](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2785s) Achievements decay and have to be revisited
- [47:21](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2841s) Toptronics and selling Grand Theft Auto
- [48:09](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2889s) Raising the price on proven value
- [49:00](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=2940s) AI routing around buyer proof
- [50:12](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3012s) The ease of replacing human work
- [50:49](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3049s) What AI does not yet recognise
- [51:49](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3109s) Does the framework fit services and products
- [53:53](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3233s) Nothing achieved is permanent
- [55:18](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3318s) You get what you measure
- [56:33](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3393s) Diversification in angel investing
- [57:34](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3454s) The camel and the unicorn
- [59:23](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3563s) Realistic valuation as the condition for returns
- [1:00:11](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3611s) Scars and trophies as the book's stories
- [1:01:24](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3684s) The Xbox story through the book
- [1:02:07](https://www.youtube.com/watch?v=tdXUiXNsUn8&t=3727s) Reinventing yourself

## Summary

**Petri Lehmuskoski**, founder of Gorilla Capital, returns to discuss his book *More Scars Than
Trophies*. Its central claim is that **product market fit is an unusable term**: it has never
been defined, so it cannot be measured, and "we're close to product market fit" tells an
investor nothing — the early end and the late end of the concept are different worlds.

**In its place the book offers four proof stacks.** The last two, the scaling gate and the exit
gate, resemble conventional thinking. The first two are where the book departs from it.

**Buyer proof** requires somebody to commit money, resources or significant time — a measurable
commitment, not "I'm interested", which is only an opinion. The term is deliberately *buyer*
rather than user proof, because a user makes no economic decision: however enthusiastic they
are, if no money moves through them it proves nothing. Miettinen's contribution is the
purchase funnel as theatre — free consulting in which an enthusiastic salesperson talks to an
enthusiastic non-decision-maker — and Lehmuskoski's addition is temporal: a startup has limited
time, and time spent on theatre is time not spent trading.

**Value proof** is the original move, because it looks both ways. Value counts only after the
customer's own cost has been subtracted: training, switching systems, investment, or at worst
the **reputational cost** to whoever signs, who can lose their standing over the decision. This
is what explains large system failures — nobody worked out what costs arise on the side — and it
is what tells you whether you can raise the price or are already too expensive. His extreme
example is an ERP migration from Dynamics to SAP: a heart transplant in flight.

**Hull speed** runs through the conversation. A displacement hull has a mathematical top speed;
fit whatever engine you like and the water flies, the stern drops and the fuel burns, but the
speed does not rise. A company's hull speed is **the product of the entrepreneurs in it** — the
factors multiply rather than add — and pouring two or three million into a company whose proofs
are not yet open is not merely wasteful but dangerous: you burn money going the wrong way for
long enough that you then have to reverse. The classic version is hiring salespeople without
evidence, three or four rounds of it, until you go and sell yourself and find the money gone.

**Two measurement arguments are worth extracting.** Revenue is a poor measure of value proof,
because revenue arises without value proof: a tough founder or salesperson will generate it, but
is it repeatable? And growth is not scaling — in growth inputs and outputs rise together, in
scaling inputs fall while outputs rise.

**The exit has to be built.** The driftwood theory of exits is a bad theory, and Gorilla's
position is that the exit should be considered from the day the company is founded, because
raising funding closes doors and options from the first round onwards. The counterweight is
that building obsessively for one dream acquirer is dangerous — after the first contact they may
simply not be interested — and Miettinen adds the AI-era curse of a counterparty taking the DD
material and building the competing product.

**On AI, Lehmuskoski makes three points.** Evidence decays faster, because new tools keep
invalidating what used to work. Bad evidence can be dressed up beautifully, decks having jumped
a light year forward — he reports that decks now arrive with prompt-injection attempts aimed at
whatever AI evaluates them. And the ability to build software with a team of coders is no longer
a gate, now that a vibe coder produces an MVP over a weekend, which creates the odd risk that
giving a customer too much value gives them an interest in replacing you.

**What must not be outsourced** is the search for buyer and value proof, because it starts from
weak signals — the questions you did not know to ask — and a salesperson only asks what they know
to ask. A customer drops a small signal about who really decides and whose budget is in play,
and the salesperson lets it pass. This is also where Lehmuskoski places the human advantage: you
can use AI for the measuring, but identifying and finding those proofs is still done better by a
person, because what matters arrives as an aside.

**The sharpest concrete example** comes from Miettinen's own field. An investment banker's pain
point is not the data room, the info memo, the teaser or their distribution — there is an endless
supply of vendors offering those — but negotiating the agreement that produces a closing, during
exclusivity. Lehmuskoski's diagnosis: buyer proof may exist, but the value proof is very weak.

**The episode closes on the camel and the unicorn.** Comparing them is a little dangerous
because they are not the same kind of thing: the camel is a way of getting somewhere, the
unicorn is an outcome, and a camel can become a unicorn without going via the extreme. Gorilla's
third fund spreads across over 70 investment decisions, on the argument that picking the early
winner has become harder than ever; the key measure at the investment stage is a realistic
valuation, so a return is possible from an ordinary exit rather than only a unicorn one.

## A note on the source

The MacWhisper transcript carries no speaker labels, but with a single guest the speakers are
reliably distinguishable, and there are no gaps in the transcription. The book's English terms
(buyer proof, value proof, scaling proof, proof stack) appear in the transcript in numerous
mangled forms and were normalised to the book's own usage in the cleaned Finnish cue file. Spoken
names that could not be verified were not guessed and are not repeated here.

## Watch

The recording lives on the Neuvottelija channel:
[Karvaat opit sijoittamisesta | Petri Lehmuskoski | Neuvottelija 407](https://www.youtube.com/watch?v=tdXUiXNsUn8).
A Finnish edition of this episode is published at
[www.neuvottelija.fi](https://www.neuvottelija.fi/fi/episodes/849-karvaat-opit-sijoittamisesta-petri-lehmuskoski-neuvottelija).

## Explore the ideas in depth

- [Nordic SaaS Valuation & M&A: How AI Reprices Software Companies](https://www.neuvottelija.com/guides/nordic-saas-valuation-and-ma/): How software companies in the Nordics are valued and sold as AI moves inference into the cost of goods sold — where multiples stand in mid-2026, the metrics that get repriced, why vertical SaaS defends its premium, AI due diligence, and the shift from seats to outcomes. Grounded in Translink's SaaS valuation work and Neuvottelija conversations.
- [Enterprise AI Agents: Economics, Governance and the Shift From Tools to Workers](https://www.neuvottelija.com/guides/enterprise-ai-agents-economics-and-governance/): A guide to enterprise AI agents — the real cost model behind agent work, why owning your own stack is becoming a strategic question, a working governance framework with approval gates and audit trails, the agent risk matrix, the EU AI Act timeline as it stands, and who captures the productivity gains. Grounded in a real multi-agent lab, two 2026 keynotes, and Neuvottelija conversations.
- [How to Sell a Company in Finland: An M&A Banker's Guide to a Clean Exit](https://www.neuvottelija.com/guides/how-to-sell-a-company-in-finland/): A practical guide to selling a company in Finland and the Nordics — the process phase by phase, share deal vs asset deal, valuation, due diligence, buyer types, deal structures, taxes on the sale, minority squeeze-outs and the ownership context that shapes every exit. Grounded in Neuvottelija conversations and Translink M&A practice.

---

Cite as: Sami Miettinen, Neuvottelija — Hard-Won Lessons in Investing | Petri Lehmuskoski | Neuvottelija 407, https://www.neuvottelija.com/podcast/episodes/ep407-karvaat-opit-sijoittamisesta-petri-lehmuskoski/, 2026-09-10. For quotes include episode 407 and timestamp.