HF0 (Hacker Fellowship Zero) is a San Francisco–based startup accelerator that runs a 12-week live-in residency program for repeat and technical founders, providing up to $1 million in funding per startup. Backed by prominent investors including Marc Andreessen and Chris Dixon, it focuses on AI-driven and deep-tech companies at the pre-seed and seed stages.
Deal activity decreased year-over-year (3 deals in the last 12 months vs 7 prior). Their most common stage is seed (62% of deals). Average disclosed round size is $10.1M (across 23 rounds with reported amounts).
Portfolio
22
Fund Size
—
Top Stage
Seed
Last 12 Mo
3
Team
Max Mullen
Visiting Partner
Walker Williams
Partner
Heather Mahoney
Director of Operations & Events
Jordan Mitchell
Creative Director
Dan Morse
Head of IR
Emily Liu
GP & COO
Heather Maloney
House Manager
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
Portfolio
| Company | Round | Amount | Date |
|---|---|---|---|
 Hamilton AI | Seed | $7.5M | Mar 2026 |
 Gency AI | Series B | $20M | Mar 2026 |
 Tenkara | Unknown | $8M | Jan 2026 |
| Gency AI | Unknown | $20M | Jan 2026 |
 AdsGency AI | Seed | $12M | Oct 2025 |
 Pam | Unknown | — | Aug 2025 |
 AvatarOS | Seed | $7M | Mar 2025 |
 Final Round | Seed | $6.9M | Jan 2025 |
 Favorited | Pre-Seed | $1.3M | Jan 2025 |
 Crossmint | Unknown | $23.6M | Jan 2025 |
 Boardy | Pre-Seed | $3M | Oct 2024 |
 Clerk Chat | Unknown | $7M | Oct 2024 |
 Manifest | Seed | $3.4M | Oct 2024 |
 Smart Roof | Seed | $7.5M | Jan 2024 |
 Roofer.com | Seed | $7.5M | Jan 2024 |
| Clerk Chat | Seed | $7M | Jan 2024 |
 Clerk.ai | Seed | $7M | Jan 2024 |
 Doctronic | Seed | $5M | Jan 2023 |
 Doctronic | Seed | $5M | Jan 2023 |
 Ephemeral | Pre-Seed | $4.5M | Jan 2021 |
 Featherless | Seed | $5M | — |
| FFeatherless.ai | Seed | $5M | — |
 Final Round AI | Seed | $6.9M | — |
| HHanabi AI | Seed | $52M | — |
Top Co-Investors
Last updated: 20 October 2026