José Marín

Background

José Marín is a Mechanical and Electrical Engineer by training who holds an MBA and an MA in International Development Economics from Stanford University ¹. He began his career as a consultant at The Boston Consulting Group before pivoting to entrepreneurship ¹.

In 1999, Marín co-founded DeRemate.com, an eBay-style online marketplace for Latin America. The company raised $75 million, completed a partial cash-out sale to Terra Networks, and later merged with MercadoLibre, which subsequently listed on the NASDAQ ². He has described starting his first company around 2001, approximately 24 years before his 2025 podcast appearance ³.

He also co-founded Serendipity Investments, through which he invested in more than 70 startups independently, including early positions in Bazee (auctions platform, sold to eBay in 2005) and eDreams (European travel site, sold to TA Associates in 2006) ². He co-founded IG Expansion, a venture builder focused on replicating proven internet business models in Brazil, investing $3–5 million per project with a cap of six concurrent builds ².

In 2013, Marín formalized his investing partnership with Fabrice Grinda by creating FJ Labs as a holding company ⁴. The firm received its first external institutional capital—$50 million from strategic investors—in 2016 ⁴. In January 2023, FJ Labs closed $260 million across two new funds (a pre-seed vehicle and a Series B+ opportunity fund), bringing total external capital raised to over $260 million ⁵. Marín is fluent in English, Spanish, Italian, French, and Portuguese ¹.

Stated Thesis

Marín and FJ Labs publicly state they focus on marketplaces and network-effect businesses. Their stated thesis, as described on the firm’s website and in public appearances, emphasizes backing “scalable and capital efficient businesses with sound unit economics and market leader potential” ⁶. The firm explicitly states it does not lead rounds or take board seats, positioning itself as a collaborative co-investor that partners with institutional VCs ⁶.

FJ Labs publicly describes a four-criteria framework for evaluating investments: (1) team quality—“visionary founders who are fantastic at execution” with strong communication and analytical ability; (2) business fundamentals, including attractive unit economics and market opportunity; (3) fair deal terms; and (4) thesis alignment with their vision of the future centered on inequality of opportunity, climate, and well-being ⁵.

The firm also publicly emphasizes speed: it targets investment decisions after two one-hour calls over the course of a week, investing in roughly 2–3% of deals reviewed from an inbound flow of 200+ deals per week ⁶.

Inferred Thesis

Based on the FJ Labs portfolio page (which lists year, stage, and region for each entry), this analysis draws on a sample of 55 verified investments where year and stage data were directly available ⁷.

Stage distribution (55 verified entries): - Pre-Seed: 12 (22%) - Seed: 30 (55%) - Series A: 9 (16%) - Series B+: 4 (7%)

The portfolio skews heavily seed-stage, consistent with the firm’s stated “seed and early stage” focus. The Series B+ entries (Airbnb 2014, AngelList 2022, Anduril 2022, ATAI 2020) appear to be later-stage co-investments in established names, not characteristic investments.

Geographic distribution (55 verified entries): - US + Canada: 35 (64%) - Europe: 11 (20%) - LatAm: 3 (5%) - Asia: 3 (5%) - Africa: 1 (2%) - MENA: 1 (2%) - South Asia: 1 (2%)

Predominantly US-focused, with meaningful European exposure. Latin America and emerging markets are a small but deliberate slice, likely reflecting Marín’s personal background and expertise.

Temporal distribution (55 verified entries): - Pre-2008: 4 (7%) - 2011–2015: 7 (13%) - 2016–2019: 8 (15%) - 2020–2022: 24 (44%) - 2023–2025: 12 (22%)

Investment pace accelerated sharply in 2020–2022, consistent with the firm’s deployment of Fund I ($175M) and the close of $260M across two new vehicles in January 2023 ⁵. Active deployment continued into 2025 (180 Seguros Series B, AACI Group Pre-Seed, APFusion Series A, Ace Waves Seed) ⁷.

Sector patterns: The firm claims ~70% marketplace investments ⁵. The portfolio page shows a broad spread across e-commerce enablement (Affirm, Flexport, ShipBob), labor/services marketplaces, B2B SaaS tools, fintech, and consumer internet. Marín has specifically called out B2B digitalization of offline industries, SMB enablement platforms, vertically specialized labor marketplaces, and cross-border commerce as emerging themes he is actively pursuing ³.

Check size: The firm’s stated average check is approximately $400,000, with a range of $220K–$1.3M per the NFX Signal profile ⁸. The firm does not lead rounds and does not set valuations; it invests at terms set by others ⁶.

Founder profile patterns: Marín has stated a preference for founders who are strong communicators able to sell their vision to both investors and employees, who think analytically about unit economics and capital efficiency, and who demonstrate genuine personal passion for the problem they are solving ³.

Co-investor patterns: FJ Labs explicitly partners with hundreds of institutional VCs globally rather than competing with them. Notable co-investors visible across the portfolio include Sequoia, Andreessen Horowitz, Tiger Global, SoftBank, and leading seed funds. The firm receives approximately 32% of deal flow from other VCs and 32% from founder networks ⁵.

Notable gap: The firm’s stated thesis emphasizes marketplace and network-effect businesses, but the portfolio (particularly the 2020–2022 acceleration) includes non-marketplace SaaS, enterprise software, and even defense tech (Anduril 2022). These outliers represent a minority but indicate willingness to deviate from stated focus for high-conviction opportunities.

Portfolio

The following table includes verified investments drawn directly from the FJ Labs portfolio page ⁷, supplemented by the FundersClub profile ². The portfolio page lists over 900 companies; this table represents the first 55 entries confirmed with year, stage, and region data.

This table represents approximately 5–6% of FJ Labs’ 917+ verified investments as of December 2025 ⁹. Portfolio data is from the FJ Labs portfolio page (year = FJ Labs’ investment year, not company founding year) ⁷.

The four companies marked ~YYYY (Delivery Hero, Flexport, Rappi, Wallapop, Betterment, FanDuel) are confirmed FJ Labs portfolio companies ² but exact FJ Labs investment year could not be independently confirmed; approximate years are based on the companies’ known early funding timelines.

In Their Own Words

On marketplace opportunity:

“I think that we are just at the tip of the iceberg… There is still a lot of stuff that can happen in marketplaces that has not been done.” ³

On FJ Labs’ investment approach:

“We don’t need rounds and we don’t join boards.” ³

“We don’t have to go out to the market and reach out to people because we want to invest in their businesses. They actually come to us.” ³

“We don’t set the terms… we are easygoing. We generally either like it and invest or don’t like it and don’t invest.” ³

On founder selection:

“We want to have people that are extremely good communicators, people that can sell the dream, not only to other investors, but also to their own team.” ³

“We like to see entrepreneurs that think how much money am I putting in, how much am I putting out, and how am I gonna be making money out of this?” ³

“People that have passion, that they are doing something that they really like and that they really care about.” ³

On the long-term partnership with Fabrice Grinda (Fabrice Grinda speaking, describing the founding of FJ Labs):

“I loved angel investing and building startups. I had already partnered with Jose Marin, another Deremate co-founder, to jointly evaluate angel investment opportunities. We created FJ Labs to further pool our investing and startup creation activities.” ⁴

On the scale of the shared venture:

“Jose and I have been angel investing for over 14 years. We love angel investing. We love working closely with entrepreneurs. It’s an amazing learning experience and source of inspiration.” ²

What Founders Say

No independently sourced founder testimonials specific to José Marín found. FJ Labs’ website and public materials describe the firm as founder-friendly due to its no-board-seat, no-lead policy and fast decision process, but these are firm marketing materials, not independent founder voices ⁶.

Sources