Aug 11, 2025 · 1h 22m · 20vc
Index Ventures Partner, Martin Mignot: Figma, Scale, Wiz: Inside Index’s Decacorn Factory · 20VC with Harry Stebbings
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Index Ventures Partner Martin Mignot joins Harry Stebbings to dissect the evolving dynamics of venture capital, detailing Index's unique investment frameworks and iconic case studies like Revolut. The conversation explores the psychological traps of cognitive bias, the mathematics of the venture power law, and the deeper humanistic purpose of backing elite founders.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Harry holds 23.4% of the talking time here. How this is scored →
Harry as informed peer 5.3 Guest teaching 4.5 Guest disagreement 2.0 Harry pushing back 4.3
speaking balance: gold is Harry, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 5:42 Guest refuses to comment on competitors and host calls cop-out
Harry explicitly calls Martin's diplomatic refusal to comment on competitor seed strategies a cop-out, creating a tense banter moment.
Hardest push from Harry ▶ 7:52 Harry challenges Index on partner turnoverHarry directly challenges Index's claim of team stability by pointing out high turnover and naming specific partners.
Biggest teaching moment ▶ 1:18:04 Martin dismantles host premise about Index leadershipMartin firmly corrects Harry's question about succession by explaining Index has no CEO and that its decacorns were led by seven different partners.
Harry holds his own ▶ 33:53 Harry lays out a structured thesis against Series A risk-rewardHarry demonstrates deep venture mechanics expertise by detailing why Series A valuation markups drastically outpace business progression.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Harry as informed peer | Guest teaching | Guest disagreement | Harry pushing back | Why |
|---|---|---|---|---|---|---|
| Playing the Long Game in Venture | 5 | 3 | 3 | 4 | Harry quotes Doug Leone regarding venture moving to a commoditized industry, prompting Martin to disagree gently and outline Index's 'third way' strategy. | |
| The Impact of Mega AUM on Early Stage | 6 | 3 | 4 | 7 | Harry challenges Martin on mega funds and calls Martin's refusal to comment on competitor seed strategies a cop-out, using a club entry analogy. | |
| First-Principles Support and Multi-Product Funds | 7 | 4 | 3 | 8 | Harry directly challenges Index's team stability by citing turnover and naming individual partners, forcing Martin to defend Index's retention across ranks. | |
| The Validity of the Midas List | 6 | 6 | 4 | 7 | Harry attacks the validity of the Midas List, prompting Martin to reframe it as a lagging indicator of great investments made ten years prior. | |
| Time to Copy and the Value of Unique Insights | 6 | 4 | 1 | 3 | Harry brings in insights from Fiverr's founder on time-to-copy and questions market timing using hardware and mobility examples. | |
| Avoiding Past Bias in Decision Making | 5 | 6 | 2 | 4 | Martin shares how past investment experiences like Last.fm created negative bias that led Index to pass on Spotify multiple times. | |
| The Team vs. Market VC Career Curve | 5 | 3 | 1 | 3 | Harry discusses the VC career curve and questions whether early revenue scaling has become commoditized in the AI era. | |
| Internal Decision Making and Quorum Voting | 5 | 6 | 2 | 3 | Martin details Index's voting mechanism and explains why low initial gross margins in companies like Revolut and LLM providers shouldn't deter early-stage VCs. | |
| Cultural Differences in Founder Storytelling | 5 | 4 | 2 | 5 | Harry notes cultural differences in founder storytelling between US and European entrepreneurs, which Martin acknowledges and explains how Index accounts for. | |
| Price Sensitivity and Valuation Mental Traps | 5 | 5 | 2 | 6 | Harry cites Peter Fenton's claim that price is a mental trap, pushing Martin on whether valuations can become genuinely prohibitive. | |
| Round Preemption and Multi-Stage Flexibility | 4 | 3 | 1 | 3 | Harry jokes about preempting rounds immediately after seed, leading into a discussion on target ownership evolution across fund cycles. | |
| Is Series A the Worst Place to Invest? | 8 | 4 | 2 | 6 | Harry articulates a strong thesis on why Series A is currently the hardest risk profile in venture, citing high price inflections relative to business traction. | |
| Government AI Involvement and Algorithm Transparency | 5 | 4 | 2 | 4 | Harry asks about European tech sovereignty in LLMs and government regulation, prompting Martin to argue for open and auditable social media algorithms. | |
| Late-Stage Entry and Competing for Startup Talent | 6 | 3 | 1 | 5 | Harry highlights the aggressive talent war and compensation packages startups face against big tech, as well as the intense work culture required to win. | |
| Liquidity Strategy and Post-IPO Systematic Selling | 6 | 5 | 3 | 7 | Harry challenges Index's rigid quarterly selling program post-IPO, arguing VCs lose massive upside in category winners like Shopify. | |
| Secondaries and the Extension of Private Markets | 6 | 5 | 2 | 7 | Harry presses Martin on why Index let Greylock lead Figma's Series A despite Danny Rimer's deep early conviction during Figma's multi-year stealth build. | |
| Conviction and the Pitfalls of Underestimating Winners | 5 | 6 | 1 | 2 | Martin recalls his initial meetings with Nick Storonsky, highlighting how Revolut used zero-fee FX as an easy entry hook for international travelers. | |
| Revolut's Global Strategy and the Advantage of EU Passporting | 5 | 6 | 2 | 2 | Martin explains how Revolut leveraged Lithuanian licensing to passport across the EU, proving European founders can scale globally given unified market access. | |
| Why You Should Never Bet Against Nick Storonsky | 5 | 5 | 1 | 3 | Harry and Martin discuss Nick Storonsky's relentless intensity, first-principles thinking, and uncompromising global ambitions. | |
| Reflecting on Personal Gaps and the Generalist Edge | 5 | 4 | 1 | 3 | Martin reflects on his personal blind spots as a generalist non-operator, while Harry shares why 20VC added operational expertise to its team. | |
| Quick-Fire: Immediate Conviction and the Power Law of Saying Yes | 6 | 6 | 1 | 3 | Martin reveals an internal Index post-mortem showing that blindly accepting every pitch brought to the partnership would have yielded higher returns by avoiding missed outliers. | |
| On Marriage, Cross-Cultural Partnership, and How Fatherhood Reshapes Venture | 3 | 4 | 1 | 2 | Martin shares personal lessons on cross-cultural marriage, family grounding, and how fatherhood forces extreme prioritization in VC. | |
| Index Ventures' Equal Partnership Structure and Mega-Winners | 6 | 7 | 4 | 4 | Harry asks if Martin wants to run Index next, but Martin corrects him by explaining Index operates as a true equal partnership with returns distributed across seven partners. | |
| Techno-Humanism and the Joy of the Venture Journey | 3 | 2 | 1 | 1 | Martin closes with a techno-humanist perspective on technology reducing human hardship, ending the interview on a warm, collaborative note. |
Statements from this episode (54)
Mignot: Early-stage investors should ignore poor gross margins
“Beware of gross margin in the early days. That's a mistake we made a couple of times. You know, you have a lot of businesses that in the early days have really bad gross margin. All the LLM providers were very clear examples of that. I think if that's the only…”
Mignot: Index Ventures never passes on early-stage deals over price
“We never lose a deal or pass on a deal because of price in the early stage.”
Mignot: Index Ventures returned $30B and holds $20B+ across 30 years
“So we've been around for 30 years. We invested 11 and a half billion dollars. We've returned close to 30, and we still have 20 plus in holdings. Most of that is concentrated in eight, nine companies. We invested in probably 300, close to 400 companies over the…”
Mignot: Venture capital has institutionalized into a career rather than a calling
“I don't know if I would say Tourist VC, but I would say it's, ah, the asset class has institutionalized. You know, it's become, ah, you know, funds have become larger, there's more people in, in, in general, by and large. And so you bring people who, ah, may s…”
Mignot rejects narrative that VC is splitting only into mega-funds and boutiques
“I know there is a meme which is the industry is gonna, is diverging into two camps. You either have the mega funds, the asset gatherers, or you have the tiny boutique shops. And I don't truly believe in that. I think there is a third way”
Mignot: Mega VC funds benefit managers financially but not entrepreneurs
“I think this push towards larger asset gathering is very good for VCs who do it. You know, it can make a lot of sense financially. It can make a lot of sense for them. I'm not sure it makes so much sense for the entrepreneurs themselves.”
Mignot reveals Index Ventures' latest fund sizes across stages
“We have a three hundred million dollar seed fund eight hundred million venture fund, and one and a half billion gross fund.”
Mignot: Mega funds distract VCs and hinder early-stage investing
“On the early stage you know, either seed or early venture or early growth, I don't think you need, you know, those mega assets, and I think they distract you, and they tend to pull you towards the later stage, and, you know, if you have so much capital to depl…”
Stebbings: Mega-AUM funds treat seed investing as a cover charge
“When you went clubbing and you have to pay the entry fee at the door, that's like seed for the AUM galleries and the table is the C and the D.”
Mignot: Midas List presence is the top predictor of VC returns
“I was chatting with you know, with Iliad, Quantumlight, and he, about it the other day, and they said the number one factor that they noticed was a good predictor of future returns was whether a partner was on the Midas list, a partner, an early stage investor…”
Stebbings: Midas List investors did not do the deals they claim
“I look at the Midas list, and none of the people on that did the deals that they said they did.”
Mignot: Forbes Midas list measures performance from 10 years ago
“My view on the Midas list is, it's a really good list for who was a great investor 10 years ago, and so that, that's kind of how I would describe it, because if you look at a lot of these companies, there were deals that were made, you know, 10 years ago and s…”
Martin Mignot: Top founders leverage VCs for targeted help, not one-stop support
“The best founders I've seen are very good at reaching out to investors and people around them on very specific topics when these people, it's leveraging the right people at the right time, being very specific about that versus going to, you know, I think that'…”
Mignot: Revolut's core insight was offering costless high-volume FX for free
“FX, For a large corridor where you have a lot of volume of transfer costs nothing. So it should be given, you know, given for free, you know, to the market. And then once you have that, that's a really good hook, and then you can build something else.”
Mignot: Deliveroo's core product is sub-20 minute delivery speed, not the app
“Look at, you know, Will at Deliveroo, for example, his insight was very much the product is the delivery, which sounds obvious, but it's not the digital experience. It's the speed and quality of the delivery, and it has to come below 20 minutes. That's the, if…”
Mignot: Lime and Dott will ultimately succeed in micromobility
“I still think that some companies will do well, actually, in that space. I think Lime is, is doing well. I think Dot is doing pretty well. I think they will be okay at the end, but it's clearly, you know, it's been a really, really difficult space.”
Martin Mignot: Early Revolut success created bias against other fintech deals
“I was lucky enough to be early in Revolut, and, Then I looked at a lot of other fintech investments were like, well, Revolute can do this, so Revolute does it better”
Martin Mignot: Index Ventures missed out on Qonto due to Revolut bias
“We could have invested in any, you know, in a lot of other neobanks you know, you think, I mean, Qonto would be a really good example of that. A lot of, you know, remittance and certain corridors, and so there's a lot of players.”
Mignot: Index passed on Spotify multiple times due to music industry bias
“The example we always use at Index is, is Spotify. And to your point, it wasn't because of a bad investment, it was because of a mediocre investment, which is different. You know, we had just invested in Last.fm, which was a, you know, a totally reasonable out…”
Mignot: Workflow-integrated AI tools achieve significantly higher user retention
“Especially if it's inserted inside their workflow, you know, Cursor is a good example, you know, we've made a bunch of those type of investments, then in all likelihood, even if the numbers didn't show it yet, in all likelihood, the stickiness of that product …”
Mignot: Index Ventures bans 5 and 6 votes in deal approvals
“We vote one to 10. You can't vote five and six, so you have to be, you know, four against, and then it's kind of a, so it's a qualified majority, essentially, so if the average is above six, you know, the deal is approved”
Mignot: Revolut operated as a negative gross margin business in early stages
“Especially in the early stages, it was kind of, You know, negative gross margin business. I mean, they were basically giving away effects that weren't charging for anything else. You had a little bit of interchange, but not that much.”
Martin Mignot: Index Ventures splits investments evenly between Europe and US
“We consistently invest about half in Europe and half in the US”
Mignot: Index has backed companies at excessive valuations that caused harm
“Oh yeah, for sure. Definitely.”
Mignot: Index requires double-digit exit ownership for fund-returning deals
“For us, the goal is to get double digit ownership at exit. That is the, you know, that is typically where we, if we look at the performance of the fund, most of our returns have been generated by companies where we own close to or more than double digit owners…”
Mignot: Index Ventures avoids maximizing ownership during seed stage investing
“Especially at seed stage, you know, our approach to seed is, is much more collaborative. You know, the idea is we don't want to compete with people like you and, you know, and other, other seed funds and angels, you know, we want to bring them along, we want t…”
Stebbings: Series A is currently the worst venture stage to invest in
“I think Series A is the worst place to be investing today. Obviously we do Series A. Not promoting ourselves. It's a very truthful exposure. It's like, hey, the price inflection point is so high, often three to five X, and the company progression is often less…”
Mignot: Index Ventures holds investments in LLM providers Cohere and Mistral
“We're in Cohere, and in and we have a seed investments in Mistral.”
Mignot: LLM investments will yield lower venture multiples but huge absolute returns
“The pure venture multiple will likely be lower than some of the other categories in the past. I think that is clear. The difference is that the size of the outcome and the speed of Very importantly, the speed at which the size is gonna get reached means that y…”
Mignot: European LLM market will definitely be smaller than OpenAI
“I think there is a market. You know, is it gonna be smaller than OpenAI? Yes. For sure.”
Mignot: Governments should support local AI as customers, not investors
“I do believe that having, you know, government entities or quasi government entities support local innovation is in that critical field is, is important. I think the way to do it is not necessarily to I think they should be customers. I think they should buy t…”
Mignot: Social media algorithms must be public and auditable
“I think it should be loud, but there should be a bigger conversation about social networks and about the openness of algorithms, which don't only apply to TikTok, but, you know, applies to X, applies to Facebook. I think those algorithms should be should be pu…”
Mignot: Index Ventures passed on Zendesk early rounds before growth investment
“That was just before I started, but we did that with Zendesk, for example, where, you know, we passed on, on, on the seed and on DA especially You know, if you look at the memo and the valuation at the time, it's quite funny in retrospect, I don't remember exa…”
Mignot: Building venture-backed hyper-growth startups requires seven-day workweeks
“If you look at the most incredible companies in the past, you know, you look at Revolut, you look at Deliveroo, all of these companies, the amount of work that these founders and these early teams put in was tremendous. I mean, it was seven days a week, you kn…”
Mignot: Index sells post-IPO shares quarterly over three years
“We tend to have a very standard liquidity program when a company goes public, where we sell, you know, every quarter over three years in a very, you know, recurring, regular, preset way in many ways. We obviously have, you know, we have an, we set up exit comm…”
Mignot: Index sold Robinhood shares lower but retains a large stake
“We were a very large investor in in Robinhood and we sold you know we sold quite a bit at a lower price than where it is today. You know, we still have a large stake”
Mignot: Systematic post-IPO selling beats market timing across VC portfolios
“If we looked at, if we had taken different schedules, we would have been worse off, and so we felt that overall, if you look across a basket, a portfolio, and again, it's a portfolio approach, so you may be wrong on one or two, but if you take a portfolio appr…”
Mignot: Index Ventures holds nearly all investments until IPO
“I think, in, by and large, we tend to hold pretty much everything until IPO.”
Mignot: Index Ventures invested in every funding round of Figma
“We invested in, you know, every round.”
Mignot: Proximity to portfolio companies creates negative bias in VCs
“Also, you know, I think we have a, there is a tendency where the, sometimes, you talk about, you know, asymmetry of information, but it goes both ways, where sometimes you're so close to a business, you really see how the sausage gets made, and you can end up …”
Mignot: Index Ventures avoids detailed number crunching for scenario planning
“We don't waste cycles, go incredibly detailed into those. Yeah, we do, we, I think we focus more on, you know, sensitivity analysis, so we focus on what are the few levers that really matter for this business, and where do we think they're gonna go, but, you k…”
Mignot: Multiple touchpoints in a short window signals exceptional startups
“Typically, when you have exceptional companies, one of the indicator is that you will have multiple touch points about that company over a very short amount of time. So, you will, I will see them at Sitcam, but someone will, you know, I will see an ad, or I wi…”
Mignot: Securing banking licenses is much easier before reaching scale
“I think he would, you know, I mean, I heard it said that a couple of times because, and you see today, it's a lot easier to get a banking license when you were, before you have scaled and then after you have scaled.”
Mignot: Revolut is better than any US neobank
“They're, you know, they can be as big, if not bigger than anyone in the world, and I think Revolut is probably, you know, one of, if not the best neobank in, in the market in, in many ways. It's, I think, better than anything, you know, in the U.S., for exampl…”
Mignot: Index Ventures is actively backing the EU Inc policy initiative
“And obviously, you know, we're very involved with EU Inc., which is this initiative to have one kind of single unified status and a super simple way for companies to expand across Europe. And I think that could be an absolute game changer.”
Mignot: Nik Storonsky targeted building a company larger than JPMorgan Chase
“Like, you know, eventually he thinks, he's convinced there is, there will be one global money app, and that he can be that one global money app that could be better, you know, bigger than, you know, when we first met, he wanted to be bigger than JP Morgan.”
Mignot: I will never go deep on product during board meetings
“And also, you know, I haven't been an operator and a founder, so I won't try to, you know, I will never be on a board meeting and kind of go super deep on your product.”
Mignot: Jan Hammer is the strongest investment picker at Index Ventures
“I'd say Jan is probably the strongest. Yeah, I mean, if you look at his track record, you know, the consistency and some of the incredible winners that he has. I think he's a great picker.”
Mignot: Auto-investing in every pitch would have yielded better returns
“We ran the same analysis, where if you had said yes to every single company that had come to present at the partnership, we'd have done a lot better than we have. Simply because it goes back to the power law.”
Mignot: Fatherhood forces investors to stop wasting time on travel and conferences
“Having kids makes you even less tolerant of wasting time, because any moment you spend on the road, at a conference, at an event that you shouldn't be on, it's time you're not spending with, you know, with the most important people in your life.”
Mignot: Index Ventures has no CEO and operates as an equal partnership
“Well, first of all, there is no one running index, and Danny doesn't have a mantle. You know, it's a pure purely equal partnership.”
Mignot: Seven partners generated Index Ventures' top eight fund returns
“It's a very equal partnership, and, you know, even in terms of performance, so I mentioned there's like eight companies that represent the, you know, the largest share of return, They've been there has been involvement from seven partners for these eight compa…”
Mignot: VC relationships are cooperative because late-round returns remain high
“And most of our relationships are very cordial and they are very cooperative because we're creating value. There's so much value creation that happens that you don't have to, of course you compete to win a deal, but then you can still go on at the next round a…”