20VC: Index's Shardul Shah on Why Market Size is a Trap | Biggest Lessons on Pricing from Leading Rounds in Wiz & Datadog | Why Benchmarks & Averages in VC are BS | How Index Makes Decisions and Why Growth & Early are the Same Investing Style
Most important take away
In venture, the biggest costs are sins of omission, not commission. Shardul Shah’s three rules distilled from a partnership post-mortem: don’t be cute on price, don’t overthink it, and don’t pass on generational founders. TAM is a trap because the best founders find and expand markets beyond what any analyst can model.
Summary
Actionable insights and career advice from Shardul Shah, partner at Index Ventures (Wiz, Datadog, Duo, Coalition):
- Be yourself, don’t assimilate. Shah rejects the idea that climbing a VC firm requires playing internal politics. If your goal is to be the best version of yourself and the firm’s goal is to be the best firm, there is no room for conformity. Find where you are uniquely great across the three pillars: sourcing, selecting, and servicing (he adds “winning” as a fourth competency and considers it the hardest to develop).
- Be radically intentional with time. Default meeting length should be 30 minutes, not 60. The threshold for taking a meeting is high because you are also prioritizing a colleague’s time (Index tries to send two people to every meeting). Hand off meetings when a colleague will have more chemistry or relevant expertise.
- Career pattern in founders: the best founders almost always start entrepreneurial activity early in life. Shah now spends more time on a founder’s childhood than on the business itself, after interviewing 500+ founders.
- Founder traits Shah screens for: imagination, operational excellence, and high-quality decision-making — rare in one individual.
- The only pattern is that there is no pattern. Use both intuition (a refined craft) and an analytical framework; treat agreeable disagreement from respected partners as a signal to go deeper, not as a reason to abandon conviction.
- Don’t be cute on price. Every Datadog round and every Wiz round was at a “high” price. If you have conviction, late-stage price is just a representation of future expected cash flow — if you’re wrong, you’re wrong on the investment, not the price. Seek discomfort; the business is about outliers, not “good deals.”
- TAM is a trap (General Akbar voice). Public companies routinely exceed the TAMs in their S-1s. The best founders find and expand markets. Index systematically underestimates the magnitude of its best companies.
- Power law applies at every stage. There is no such thing as a “safe 2x” — even at growth, target 5x+ upside. Averages and benchmarks are exercises in psychological safety, not investing.
- Conviction vs. delusion is the hardest line at growth stage. Symptoms of delusion: getting lazy, skipping details, not asking questions, being surprised by new information. Re-underwrite every follow-on as a net-new fund-returner investment — redo the management assessment, customer calls, competitive analysis, and financial model.
- Seed strategy: underwrite the whole round, then split into three sleeves — Index, a seed fund, and angels/operators. Limit angel count, no minimum check size (5K helpers can be invaluable), avoid customer money (conflict of interest), and never run a party round.
- Board member craft: do less. Hold up a mirror — play back to founders what they have already said. The few things that matter: helping say no to big opportunities, executive hiring decisions, and being the first call on weekends.
- VCs damaging boards: putting personal liquidity ahead of capital allocation strategy; pushing M&A that serves the investor not the company.
- When to sell: lean Charlie Munger (buy and hold), but sell immediately if a founder is on the unethical-to-incompetent spectrum. Don’t try to outsmart Mr. Market on public stocks, but venture investors can have an edge in hold duration and deep context — guard against rose-tinted glasses with group decision-making.
- Best management lesson from Danny Rimer: intentionality and “keep the main thing the main thing.”
- Walking meetings (learned from former Secret Service agent Steve Ward, via a Bill Clinton/Madeleine Albright anecdote): movement plus heading in the same direction defuses conflict.
- Remote decision-making: trust takes time to build and is easily fractured; in a power-law business, ego and insecurity can amplify, so culture must be deliberately nurtured.
- Biggest mistake first-time founders make: not firing fast enough.
- ZIRP sins: best founders didn’t grow aggressively enough, and investors didn’t maximize liquidity opportunities.
- Tech / market patterns mentioned: cloud is on a path to $1T+ in spend; security typically attaches at 5–10% of category spend, market leaders capture 25%+ share — so cloud security winners can be enormous (Wiz thesis). Endpoint security (CrowdStrike, SentinelOne) is the category Shah got wrong by assuming platform commoditization. AI is a tailwind for both existing categories and new ones; New York’s Series A mix skews ~25% healthcare vs. SF.
- Future of venture: Rolex / Swatch / Apple Watch coexistence — boutique constrained funds (Benchmark-style) and “walls of cash” multi-stage platforms (Andreessen, Sequoia, Index) will both persist. The industry’s power law lets incumbents withstand long cycles.
Chapter Summaries
- Authentic career building in venture: Reject assimilation; lean into your unique strength across sourcing, selecting, servicing, and winning. Index promotes via mentorship, not corporate-ladder gamesmanship.
- Mentorship from Danny Rimer: Intentionality with time and communication; default to 30-minute meetings; aim for two Index partners per meeting; delegate based on chemistry and domain fit.
- Concentration vs. majoring: Shah is stage-agnostic and concentrates (not majors) in cyber. Evaluating teams is the constant across stages.
- Evaluating founders: Start early, look for imagination, operational excellence, and high-quality decision-making. There is no pattern beyond the power law.
- Conviction and the analytical framework: Intuition is a craft refined over time; the post-mortem of missed deals produced three rules — don’t be cute on price, don’t overthink it, don’t pass on generational founders.
- Pricing and risk: Conviction makes price elastic. Datadog and Wiz were always “expensive.” Seek discomfort; you are not a value investor.
- TAM is a trap: Best founders expand markets beyond any S-1 projection. Shah ignores TAM math but admits to misreading market dynamics (CrowdStrike / endpoint security).
- Capital intensity: Multi-stage funds can build ownership over time; avoid binary scientific-risk categories like biotech drug discovery.
- Doubling down: Re-underwrite from scratch each round; rotate shadow partners for objectivity; reject “safe 2x” thinking — target 5x+ at every stage.
- Wiz conviction example: Top-down ($1T cloud market, 5–10% security attach, 25%+ leader share), public comps (CrowdStrike $50B+, Palo Alto $100B+), bottom-up fastest-growing-ever, world-class team additions (Dolly as COO).
- Building team culture: Trust, mutual respect, admiration take time and are easily fractured by ego in a power-law business; walking meetings defuse conflict.
- Virtual decision-making: Gains perspective (e.g., reading body language on Zoom); loses time-zone alignment and cognitive sharpness.
- Sins of omission >> sins of commission: Pattern recognition and benchmarking are psychological safety exercises.
- Seed strategy and three-sleeve rounds: Index + seed fund + angels/operators; underwrite the whole round; limit the angel count; angels for rainy day, distribution, product, engineering.
- Sourcing/selecting/winning/servicing: Winning is hardest to develop. Shah’s strength is winning; focus area is servicing.
- Board membership: Do less. Hold up the mirror. Few things matter — saying no to big opportunities, hiring executives, being the first call. Misaligned VCs push liquidity timing or M&A strategy.
- When to sell: Munger-style hold for fund returners; sell immediately on unethical/incompetent founders; group decision-making guards against rose-tinted glasses.
- Future of venture: Boutique and platform models coexist; AI and geographic mix (healthcare in NYC) are reshaping where alpha lives.
- Quickfire: Public speaking — have fun, be yourself, record and watch yourself. First-time founder mistake — not firing fast enough. ZIRP sin — under-growth from founders, under-liquidity from investors.