Interview, Fireside Chat
Inside Thrive Capital: Investing in OpenAI, Wiz, Cursor, Nudge, Physical Intelligence
Thrive Capital & Philip Rossetti: Fund Strategy & Portfolio Highlights
Investment Philosophy:
- Thrive's core tenet, taught by founder Josh Kushner, is that "the people who win deals are the people who want to win deals the most."
- The firm prioritizes "leaving it all in the field" to secure partnerships, viewing competitors as self-improvement metrics rather than direct adversaries.
- Thrive employs a highly concentrated strategy (approximately 25 companies) rather than a "spray and pray" approach to align with the power law where a small number of companies drive disproportionate value.
- Decisions are anchored in long-term decision processes and fundamental inputs (e.g., the "swing" of the shot) rather than short-term market outcomes or momentum.
Physical Intelligence & Hardware Thesis:
- Rossetti predicts a hardware renaissance due to falling input costs (sensor costs dropped from ~$80k to a few hundred dollars in a decade) and the availability of talent trained by the first wave of hardware startups (e.g., SpaceX, Anduril).
- Unlike software, which faces lower barriers to entry and often decelerating growth at scale, hardware businesses often exhibit geometric growth rates as they scale and access larger markets (citing SpaceX's transition from launch services to Starlink).
- Investment in Mesh Optical:
- Thrive led the seed round for Mesh Optical, co-founded by Travis and Cameron from SpaceX's Starlink photonics team.
- The company applies satellite laser interconnect technology to data center infrastructure, addressing the $100B+ AI capex build-out.
- Investment in Nudge:
- Nudge applies non-invasive ultrasound to stimulate specific brain regions to treat neurological conditions (depression, addiction, pain).
- Co-founders Jeremy (ex-Neuralink) and Fred (ex-Coinbase) are described as "life's work" founders with a missionary purpose.
- The technology aims to replace unpleasant clinical treatments (like TMS/electroshock therapy) with wearable, at-home headsets.
- Investment in Physical Intelligence:
- Thrive backs this robotics company, aligning with the thesis that solving problems requires moving "atoms" (physical world) rather than just "bits."
Software Portfolio & AI Dominance:
- OpenAI:
- Thrive invested starting in the $29B valuation round (Jan 2023), long before ChatGPT's public release, after witnessing a GPT-4 demo in Nov 2022 that passed the Turing test.
- Valuation progression noted: $29B (Jan 2023) → $86B (Feb 2024) → $157B (Oct 2024) → $500B (Oct 2025).
- Rossetti attributes OpenAI's success to "speed as a moat" and high talent density, including young researchers who have "AI native" brains rather than just established stars.
- Future trajectory identified as the shift to "what comes after SaaS" rather than "what comes after OpenAI," where intelligence is productized via API.
- Cursor:
- An AI pair programmer for developers that grew from tens of thousands of users to hundreds of millions in run-rate revenue within 18 months.
- Founded by Michael (met in late 2022 on a mechanical engineering pivot) and Amman; merged with other co-founders (Swally, Arvid) to build the first AI IDE.
- Michael Dell characterized the AI era as "speed chess" compared to the internet era's "chess," highlighting compressed timelines.
- Wiz:
- Cloud security startup founded by ex-Microsoft/Israeli team (Asaf, Roy, Ami).
- Acquired by Google for the largest startup acquisition sum ever reported in early 2024.
- Thrive traveled to Tel Aviv during the Israel-Gaza war to close the deal, emphasizing their commitment to founders during crises.
- Key Metrics: Unprecedented ratio of deal size to implementation speed; closed six-figure deals in weeks/months.
- Differentiation: 50% of users are software developers (not security admins); functions as an infrastructure platform (code, cloud, runtime security) rather than a compliance tool.
- OpenAI:
AI Sector Trends & Outlook:
- Technical Paradigm Shift: The industry is moving from pre-training (GPT-1/2/3/4) to post-training techniques (supervised fine-tuning, RLHF), and now to "Reinforcement Learning" (RL) as the next major frontier for model performance.
- Job Market Impact: Rossetti argues AI is currently an augmenting technology, noting no engineering firms he invests in have laid off engineers due to AI; instead, AI allows teams to tackle a wider range of problems.
- Future Applications:
- Science & Engineering: Expectation that AI will turn science problems into engineering problems (citing Isomorphic Labs in drug discovery and Periodic in materials science).
- Talent Strategy: Focus on recruiting "young talent" who can think creatively and experiment rapidly, rather than solely relying on famous researchers.
- Exit Expectations: Thrive intends for most portfolio companies to eventually go public to allow broad participation in their growth, though timelines may vary.
Strategic Context & Background:
- Philip Rossetti's Path: Originally a physics student inspired by Oppenheimer, Shannon, and Musk; pivoted to CS for pragmatism; moved from quantitative trading (Bridgewater) to early-stage VC after being recommended by a former colleague.
- Semiconductor Interest: Rossetti previously explored reshoring US semiconductor manufacturing but pivoted to investing in data center components (Mesh Optical) where Thrive had available capital.
- Concentration Rationale: The firm believes concentrating capital on "n-of-one" founders allows for deep alignment and skin in the game, mirroring the reality that the top 7 stocks represent >50% of the Nasdaq market cap.