Ian Hathaway

Background

Ian Hathaway is a Partner at the OpenAI Startup Fund, where he leads the $175 million venture fund affiliated with OpenAI ¹. He joined the fund at its launch in 2021 and assumed formal control in April 2024 when Sam Altman transferred leadership of the fund to resolve a corporate governance concern ². The transition was notable because Altman had served as the fund’s named controller since inception, and former OpenAI board member Helen Toner stated that Altman had not disclosed his ownership of the fund to OpenAI’s board ².

Before joining OpenAI, Hathaway was an investor at Haystack, a San Francisco-based seed-stage venture capital firm, from 2017 to 2021 ^{1 3}. At Haystack, he supported early-stage companies including Instacart, DoorDash, HashiCorp, Wag, and Carta ¹.

Hathaway was named to Global Corporate Venturing’s Powerlist in both 2024 and 2025, recognizing him as one of the top 100 corporate venturing professionals globally ^{1 4}.

In addition to leading the fund’s investments, Hathaway oversees OpenAI’s Converge accelerator program, launched in December 2022, which provides selected startups with a $1 million equity investment and early access to OpenAI models ^{1 5}.

Stated Thesis

Hathaway and the OpenAI Startup Fund publicly describe their focus as backing “exceptional engineers, designers, researchers, and product builders using AI to solve critical problems in healthcare, law, education, energy, sciences, and enterprise” ⁶. The fund states its core belief is that “new, powerful AI systems will give rise to a transformative wave of startups” ⁶.

VCSheet describes Hathaway’s approach as seeking to back “outsider founders building AI-native companies outside traditional Silicon Valley hubs” ⁷.

Hathaway has stated that cybersecurity is a key area of focus, noting: “AI is reshaping the cybersecurity threat landscape faster than most organizations can respond” ⁸.

On AI in education, Hathaway stated regarding Speak: “Our 2022 investment in Speak was driven by a shared vision of revolutionizing language learning with AI” ⁹.

Inferred Thesis

Based on 20 verified investments made through the OpenAI Startup Fund (see Portfolio below), Hathaway’s actual investment pattern reveals a portfolio heavily concentrated in applied AI across regulated and high-impact verticals, with notable emphasis on healthcare, robotics, and developer tools.

Sector breakdown (20 verified investments): - Healthcare/biotech: 4 of 20 (20%) – Ambience Healthcare, Thrive AI Health, Chai Discovery, Valthos - Education/language: 3 of 20 (15%) – Speak, Class Companion, Heeyo - Robotics/hardware AI: 3 of 20 (15%) – 1X Technologies, Figure AI, Physical Intelligence - Developer tools/infrastructure: 2 of 20 (10%) – Anysphere (Cursor), EdgeDB - Cybersecurity: 1 of 20 (5%) – Adaptive Security - Legal tech: 1 of 20 (5%) – Harvey AI - Fintech: 1 of 20 (5%) – Kick - Sales/marketing tech: 1 of 20 (5%) – Unify - Productivity/media: 2 of 20 (10%) – Descript, Mem - Autonomous driving: 1 of 20 (5%) – Ghost Autonomy (shut down) - Consumer: 1 of 20 (5%) – Milo

Stage distribution (20 investments, by earliest fund participation): - Seed/pre-seed: 12 of 20 (60%) – Anysphere, Kick, Chai Discovery, Heeyo, Class Companion, Milo, Thrive AI Health, Ghost Autonomy, Physical Intelligence, Atomic Semi, Valthos, Unify (seed) - Series A: 2 of 20 (10%) – Harvey AI, 1X Technologies - Series B: 4 of 20 (20%) – Ambience Healthcare, Figure AI, Speak, Endex - Series C: 2 of 20 (10%) – Descript, EdgeDB

Notable patterns: - AI-native mandate: Every single portfolio company builds on or integrates AI capabilities. This is a 100% AI-focused fund, which distinguishes it from most generalist VC firms. - Strategic ecosystem investing: Many portfolio companies build directly on OpenAI’s models, creating a symbiotic relationship between the fund’s investments and OpenAI’s platform adoption. - Converge pipeline: Several investments (Descript, Harvey, Mem, Speak, Unify) originated through the Converge accelerator, which serves as a deal sourcing funnel ¹⁰. - Multi-round conviction: The fund frequently follows on – Harvey AI received investment across multiple rounds from seed through Series D, Speak across Series B and C, and Adaptive across two tranches ^{11 12 9}. - Unicorn hit rate: At least 5 portfolio companies have achieved unicorn status: Anysphere/Cursor ($29.3B as of November 2025), Harvey AI ($8B), Figure AI ($2.6B+), Ambience Healthcare ($1B+), and Speak ($1B) ^{11 13 14 9}. - Co-investor patterns: Frequent co-investors include Andreessen Horowitz (Ambience Healthcare, Adaptive), Kleiner Perkins (Ambience Healthcare, Harvey), Thrive Capital (Chai Discovery, Unify), General Catalyst (Kick), and Lux Capital (Valthos) ^{15 8 16 17}. - Geographic concentration: The vast majority of portfolio companies are US-based, with the notable exception of 1X Technologies (Norway) and Speak (significant operations in South Korea).

Gaps between stated and actual thesis: - The stated thesis emphasizes “outsider founders” outside Silicon Valley, but the portfolio is overwhelmingly concentrated in San Francisco Bay Area and New York companies. - Robotics represents 15% of the portfolio despite not being prominently featured in the stated thesis. - Energy, mentioned in the stated thesis, has minimal representation in the verified portfolio.

Portfolio

This table represents 20 unique companies across 22 investment events. Tracxn reports approximately 44 total investments by the fund as of late 2025 ²⁶, meaning this table captures roughly 45% of known investments. The gap is likely due to undisclosed Converge cohort investments and SPV-funded deals.

In Their Own Words

Ian Hathaway on Adaptive Security (April 2025): “AI is reshaping the cybersecurity threat landscape faster than most organizations can respond. Adaptive is building exactly what the industry needs – an AI-native defense platform that evolves as fast as the attackers.” ⁸

Ian Hathaway on Adaptive Security (September 2025): “Adaptive is moving with incredible product speed to build AI-native defenses for equally advanced threats. Their platform delivers exactly what modern security teams need – realistic deepfake simulations, AI-powered risk scoring, and training that resonates. We’re proud to back a team that’s reshaping how institutions stay resilient in the age of AI.” ²⁴

Ian Hathaway on Speak (December 2024): “Our 2022 investment in Speak was driven by a shared vision of revolutionizing language learning with AI. We’re thrilled to see their world class AI talent and unique product vision create transformative learning experiences for a rapidly growing userbase worldwide. We’re excited to see Speak set new standards in AI learning.” ⁹

What Founders Say

No independently sourced founder testimonials specifically about Ian Hathaway were found. Founder quotes about the OpenAI Startup Fund more broadly (attributed to the fund rather than Hathaway personally) include:

Connor Zwick, CEO of Speak, on the fund partnership: “We are eager to use this funding and partnership to further our mission of making language learning easy and affordable to everyone. Our goal has always been to make the world a little bit smaller by breaking down language barriers, and this investment will allow us to expand our reach even further.” ²⁰

Winston Weinberg, co-founder of Harvey AI, described cold-emailing Sam Altman in the company’s early days, an outreach that eventually helped secure early access to GPT-4 and backing from the OpenAI Startup Fund. Harvey’s founding team met with OpenAI’s C-suite on July 4, 2022, and OpenAI became their seed investor ¹⁹.

Brian Long, CEO of Adaptive Security, on the AI security challenge: “Cybersecurity now begins with people, not just infrastructure. As AI becomes invisible infrastructure – embedded in how we shop, work, write, and think – it also enables deceptive attacks.” ²⁴

Connections

• Brad Lightcap – Co-partner at OpenAI Startup Fund; OpenAI COO who served as the fund’s initial manager ¹⁰
• Sam Altman – Former fund controller who transferred leadership to Hathaway in April 2024; OpenAI CEO ²
• Haystack – Former investor at Haystack VC (2017-2021), a San Francisco seed-stage firm ^{1 3}
• Converge accelerator – Oversees OpenAI’s accelerator program, providing deal flow and founder relationships ⁵
• Global Corporate Venturing Powerlist – Named to top 100 in 2024 and 2025 ^{1 4}

Sources