FJ Labs

About

FJ Labs is a New York-based venture capital firm specializing in marketplace and network-effect businesses ¹. The firm was co-founded in 2013 by serial entrepreneurs Fabrice Grinda and Jose Marin as a holding company to formalize their joint angel investing activities ². Their first institutional fund of $50 million came in 2016 from Norwegian telecom company Telenor, complementing personal capital and a small fund they ran on AngelList ². In 2018, LPs committed $175 million for a second fund ³. In January 2023, FJ Labs closed $260 million across two new vehicles: a pre-seed fund and a Series B-and-beyond opportunity fund, with backing from family offices, institutional investors, and founders of LinkedIn, PayPal, Supercell, TransferWise, MongoDB, and Wayfair ⁴.

As of 2024, the team had grown to 36 people ⁵. Over 25 years of combined investing, Grinda and Marin have deployed a total of approximately $692 million, invested in 1,192 unique companies, and achieved 355 exits with realized returns of 30% IRR and an average multiple of 2.8x ⁵. Forbes named Fabrice Grinda the #1 angel investor in the world in 2018 ⁶. The firm describes its approach as “Angel Investing at Venture Scale” — it does not lead rounds, does not set terms, and does not take board seats ^{1 7}.

Fabrice Grinda is a French-born entrepreneur whose exits include OLX.com (classified ads platform sold to Naspers), Zingy.com (mobile content, sold in 2004), and Aucland (auction marketplace founded in 1998) ⁸. He graduated from Princeton summa cum laude and previously worked at McKinsey ⁸. Jose Marin co-founded DeRemate.com, a Latin American eBay-model marketplace that raised $75 million and later merged with MercadoLibre (now public on Nasdaq) ^{9 10}. He holds an MBA from Stanford GSB and previously worked at Boston Consulting Group ⁸. Together, the founders have invested over $150 million of their own personal capital alongside the funds ¹⁰.

Stated Thesis

FJ Labs publicly describes its investment focus as marketplace and network-effect businesses ¹. The firm’s website states it seeks “visionary founders who execute” and looks for entrepreneurs demonstrating “passion, grit and tenacity” ¹.

Fabrice Grinda has articulated FJ Labs’ thesis across multiple dimensions. The firm evaluates startups using four criteria that must all be met: team quality (visionary founders with strong execution), business fundamentals (attractive unit economics and TAM), fair deal terms, and thesis alignment with marketplace opportunities ^{11 12}. For consumer marketplaces at seed stage, they target approximately $150,000/month in GMV with 15% take rates and 60-70% gross margins ¹². They expect fully loaded customer acquisition cost (CAC) recovery within approximately 6 months and 3x CAC return within 18 months ¹².

The firm has publicly emphasized its B2B marketplace thesis, identifying massive opportunity in digitizing B2B supply chains where penetration remains below 5% in many verticals ¹³. Key focus areas include B2B marketplaces for inputs (raw materials, machinery), SMB enablement, friendshoring (supply chain diversification), B2B labor marketplaces, and infrastructure support services ¹³.

FJ Labs invests at pre-seed, seed, Series A, and selectively at Series B and beyond ⁴. Average check size is approximately $400,000 ⁷. The firm does not lead rounds or take board seats, preferring to co-invest alongside lead investors ^{7 10}.

Inferred Thesis

Based on 1,192 verified investments across 25 years with 355 exits ⁵, the following patterns emerge. Note: given the extreme breadth of this portfolio (one of the largest in venture capital), sector percentages are approximated from the firm’s own reporting and portfolio page data rather than individually counted.

Sector concentration: Approximately 70% of the portfolio comprises marketplace businesses ⁷. Beyond pure marketplaces, the portfolio spans fintech/insurtech, ecommerce, proptech, mobility, recruitment, digital health, edtech, gaming, and B2B SaaS ¹⁴. The firm invests in both consumer and B2B marketplaces, with increasing emphasis on B2B since 2020 ¹³.

Stage distribution: The firm’s core focus is pre-seed and seed, where it was ranked among the most active investors by Crunchbase in 2024 ¹⁵. It was also ranked #4 most active at Series A and B ¹⁵. The 2023 fund raise formalized a dual-track approach with a dedicated pre-seed fund and a separate Series B-and-beyond opportunity fund ⁴.

Geographic distribution: Approximately 55-65% US/Canada, 25% Western Europe, 10% Brazil/India, and 10% rest of world ⁷. The firm invests globally, including in copies of established US models in large foreign markets such as Brazil, Germany, Russia, and Turkey ⁸.

Check size: Average investment of approximately $400,000 per round ⁷. Investment range spans $50,000 to $5,000,000 ⁸.

Investment velocity: FJ Labs is one of the most prolific venture investors globally, making approximately 100+ investments per year ⁷. In 2024, the firm made 189 investments (100 first-time, 89 follow-on) and deployed $74 million ⁵. The firm receives approximately 100 deals per week, reviews around 50, and invests in roughly 1-3% ^{7 12}.

Decision speed: Decisions are typically made within 1-2 weeks of initial meeting, across two one-hour calls ¹¹. This speed is a deliberate differentiator from traditional VC processes.

Co-investor patterns: 48% of actual investments originate from referrals by other VCs ⁷. The firm explicitly positions itself as a co-investor rather than a lead, collaborating with VCs rather than competing ¹¹.

Notable gaps vs. stated thesis: While the firm emphasizes marketplace purity, the portfolio includes significant positions in non-marketplace companies such as Anduril (defense tech), AngelList (fintech infrastructure), and Airbnb (at Series C+) ¹⁴. The stated focus on “inequality reduction, climate solutions, and well-being” ¹² appears secondary to the dominant marketplace pattern.

Portfolio

FJ Labs has invested in 1,192 unique companies with 355 exits as of early 2025 ⁵. The portfolio includes 44 unicorns, 21 IPOs, and 139 acquisitions ¹⁵. The table below represents a sample of notable investments; the full portfolio exceeds 1,000 companies.

Note: This table represents approximately 2.5% of FJ Labs’ 1,192 verified investments. Many entries use approximate years based on available sourcing. The firm’s portfolio page lists 900+ companies across all sectors and geographies ¹⁴.

In Their Own Words

Fabrice Grinda on founding FJ Labs: “I am an accidental venture capitalist. I never intended to run a venture firm” ⁴.

Fabrice Grinda on marketplace investing: “We love marketplaces and have been focusing on end-to-end marketplaces that provide delightful experiences and make people’s lives much easier. We believe the world is moving in that direction and there are huge opportunities in different categories” ⁸.

Jose Marin on the 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” ¹⁰.

Jose Marin on their differentiated approach: “We don’t necessarily follow the same strategy that a lot of other venture funds follow. And the key to that is that we don’t lead rounds and we don’t join boards” ¹⁰.

Jose Marin on evaluating founders: “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” ¹⁰.

Jose Marin on unit economics: “We’ve always been very thoughtful about unit economics, and we always like to prioritize unit economics over exponential growth” ¹⁰.

Fabrice Grinda on FJ Labs’ investment criteria: “We use four criteria: Do we like the team? Do we like the business? Are the deal terms fair? Is the business in line with our thesis?” ⁷.

Fabrice Grinda on founder support: “We help them raise money by making introductions to VCs who can lead their rounds, and we have deep expertise in marketplaces” ⁷.

Fabrice Grinda and Jose Marin on angel investing: “We love angel investing. We love working closely with entrepreneurs” ⁸.

What Founders Say

No independently sourced founder testimonials found. FJ Labs’ website and marketing materials describe the firm as “founder friendly value-added” investors who offer quick decision-making, fundraising support through introductions, and marketplace expertise ^{1 11}. Blog commenters on Fabrice Grinda’s investment strategy posts have praised the firm’s transparency and speed, with one founder stating the 1-2 week decision timeline is how “it should be” because “as founders we are in the business of building a great product/company and fundraising is often a necessary distraction” ¹¹. However, these are anonymous blog comments and not attributable to specific portfolio founders.

Sources