Gigi Levy-Weiss

Background

Gigi Levy-Weiss (born 1971) is an Israeli serial entrepreneur, venture capitalist, and co-founder of NFX, a seed-stage venture firm managing approximately $1.5 billion in assets ¹². He serves as General Partner and heads NFX’s Israel operations from Rishpon, Israel ³.

Levy-Weiss served as an attack helicopter pilot in the Israeli Air Force before pursuing higher education ⁴⁵. He earned his MBA from the Kellogg Graduate School of Management at Northwestern University in 2004 ⁴⁵.

His corporate career includes serving as Division President for Western Europe, Central and Latin America at Amdocs (NYSE: DOX), a billing and CRM provider, from 2005 to 2006 ³⁶. He then served as CEO of 888 Holdings (LSE: 888.L), one of the world’s leading online gaming companies, from 2006 to 2011 ³⁶.

As a founder, Levy-Weiss co-founded Playtika in 2010, the digital entertainment company that later went public on NASDAQ (ticker: PLTK) ³⁴. He also founded Beach Bum (acquired by Voodoo), InceptionVR, and Ridge (FKA Tectonic) ³. In 2025, he co-founded Line 5, a defense-tech startup, alongside Redis co-founder Yiftach Shoolman, raising a $20 million seed round ⁷.

In 2015, Levy-Weiss co-founded NFX with James Currier, Pete Flint, and Stan Chudnovsky ⁴⁸. Prior to NFX, he was an active angel investor in Israeli tech startups, with investments including Global-e, Plarium, MyHeritage, Kenshoo, and others ³⁶.

Levy-Weiss was appointed to Facebook’s EMEA Client Advisory Council in 2014 and joined the supervisory board of Bertelsmann in 2015 ³⁴. He has been named top investor in Israel by Geektime and The Marker ³.

Stated Thesis

Levy-Weiss publicly describes NFX’s investment focus as centered on businesses “that have — or want to have — network effects in their core,” spanning any sector (consumer, SMB, enterprise, fintech, healthcare, govtech) and any platform (web, mobile, AR/VR, blockchain, AI, robotics) ⁹.

On founder selection, Levy-Weiss has stated he looks for “high-agency, calm-under-pressure founders” with a “data-obsessed, cohort-focused, experiment-driven, AI-first” approach and “ultra-lean operational efficiency” ⁵. He has emphasized that “speed is one of the main character traits founders should have, whilst being willing to accept failure” ¹⁰.

Levy-Weiss and NFX employ a “Ladder of Proof” framework to evaluate startups, assessing progress across six sequential rungs from problem validation through defensibility via network effects or proprietary technology ¹¹. He has stated: “The KPIs you have should always aim to move you up the next rung in the Ladder of Proof” ¹¹.

On data rigor, Levy-Weiss has articulated a hard line: “If they don’t have a daily report or tell me it’s going to take a few days, the conversation is over” ¹¹. He has noted that NFX is currently focused on “the tools layer and on applications” within AI, looking for “profit margins like in the software field, that is, over 60%” and “unique defensibility, through proprietary data, distribution, or differentiated technology” ¹².

Regarding geography, he has stated: “We believe Israeli founders have the speed, resilience and vision to lead the AI era, and we are here to back them” and that NFX deploys approximately 40% of capital to Israeli startups with the remainder primarily to US-based companies ².

Inferred Thesis

The following analysis is based on 28 verified investments from the portfolio table below. Levy-Weiss has reportedly made 177 investments (per Signal by NFX) ⁹, meaning this sample represents approximately 16% of his total portfolio. Percentages should be interpreted as reflecting the publicly notable portion of his investments, not the full distribution.

Sector Distribution (28 verified investments)

• Gaming: 7 of 28 (25%) — Playtika, Plarium, Beach Bum, Papaya Gaming, Ace Games, ACID Labs, Moon Active
• Marketplaces / Consumer: 5 of 28 (18%) — HoneyBook, A.Team, Incredible Health, Aligned, Bizzabo
• SaaS / Enterprise: 4 of 28 (14%) — Komodor, Akooda, Global-e, Kenshoo (Skai)
• AI: 3 of 28 (11%) — Hightouch, Darrow, Akooda (also counted under SaaS)
• Fintech / Payments: 2 of 28 (7%) — Marqeta, Alterya
• Biotech / Health: 2 of 28 (7%) — Mammoth Biosciences, MyHeritage
• Crypto / Web3: 2 of 28 (7%) — Anchorage Digital, Alterya (also counted under fintech)
• Defense Tech: 1 of 28 (4%) — Line 5
• Other (AdTech, Consumer): 2 of 28 (7%) — Eyeview, SweetIM

Stage Distribution

Based on the verified portfolio, Levy-Weiss invests almost exclusively at pre-seed and seed stages through NFX, with a stated investment range of $500K to $5M and a sweet spot of $2.5M ⁹. His earlier angel investments (pre-2015) were also early-stage.

Geographic Concentration

The portfolio skews heavily toward Israel-founded companies. Of 28 verified investments, at least 18 (64%) are Israel-founded or Israel-headquartered companies. The remainder are primarily US-based. This is consistent with his role heading NFX Israel and his stated commitment to the Israeli ecosystem ².

Co-investor Patterns

Through NFX, Levy-Weiss frequently co-invests with the other NFX general partners (James Currier, Pete Flint, Morgan Beller). Notable external co-investors appearing across portfolio companies include Andreessen Horowitz (ACID Labs), Actera Group (Ace Games), and various Israeli-focused funds.

Notable Patterns Not in Stated Thesis

• Gaming overweight: While NFX’s stated thesis is sector-agnostic (focused on network effects), Levy-Weiss’s personal portfolio reveals a strong gaming bias (25% of verified investments), reflecting his background as Playtika co-founder and 888 Holdings CEO.
• Israel-heavy allocation: Despite NFX’s San Francisco headquarters, Levy-Weiss’s deal flow is predominantly Israeli, consistent with his role heading NFX Israel.
• Operator-founder preference: Many of his portfolio founders come from operational backgrounds at scaled companies, mirroring his own career trajectory from military to corporate to founding.
• Defense tech emergence: The 2025 founding of Line 5 signals a newer investment interest in defense technology, a sector not previously associated with NFX or Levy-Weiss.

Portfolio

Note: Years marked with “~” are approximate, based on company founding dates or available data. This table represents approximately 16% of Levy-Weiss’s 177 reported investments ⁹.

In Their Own Words

“For a startup, understanding VCs’ mindsets is often as important as understanding the mindsets of your customers. With no capital most Founders will not win, so you’d better learn the language.” — Gigi Levy-Weiss, NFX essay “How VCs Think” ¹⁸.

“We don’t get the luxury of investing in things because we want them to succeed. We need to invest in things because we think they’re going to succeed.” — Gigi Levy-Weiss, Boundaryless Podcast, July 2022 ¹⁹.

“Games is actually not just part of the same continuum but actually, it’s a lot more than that. Games is maybe the most extreme and pure form of Internet businesses.” — Gigi Levy-Weiss, Boundaryless Podcast, July 2022 ¹⁹.

“Most Founders I meet with think they’re data-driven. In reality, few are.” — Gigi Levy-Weiss, NFX essay “How VCs See Your KPIs” ¹¹.

“The era of just saying in a presentation, ‘I have AI inside me,’ will no longer be enough to raise money.” — Gigi Levy-Weiss, CTech interview, 2025 ¹².

“As investors — they should be grateful to have been chosen by the founders to join their journey. The founders are generally brilliant, hungry, energetic and sacrificing a lot. It’s not ‘our’ company — it’s theirs.” — Gigi Levy-Weiss, The Human Founder podcast ¹⁰.

“We are seeing the best of the best in Israel and Silicon Valley, and we are super bullish about the Israeli ecosystem.” — Gigi Levy-Weiss, Times of Israel, 2024 ².

What Founders Say

No independently sourced founder testimonials found. NFX’s website states that “Founders unanimously say that Gigi is their most valuable investor” ³, but this is firm marketing copy rather than an independently sourced quote from a specific founder. Dedicated searches for founder testimonials on Twitter, podcasts, and press did not yield attributable quotes from named portfolio founders about their experience working with Levy-Weiss.

Two professional testimonials appear on LinkedIn but are from colleagues rather than portfolio founders: one describes him as “a natural leader, not just with employees and partners but with our customers” and another states “Gigi has had an enormous positive impact on the company culture like no one before him” ²⁰. These appear to be from his corporate leadership roles (888 Holdings / Amdocs) rather than from startup founders he has invested in.

Sources