Attack Capital

Attack Capital is an AI venture studio and company builder founded by Y Combinator alumni that operates a dual model: co-building AI-native software companies alongside founders and investing in early-stage YC-backed startups. On the studio side, it works with founders, operators, and domain experts through a three-stage process of validating ideas via user interviews, AI prototypes, and market data; building a testable MVP within a stated 30-day build cycle using in-house AI engineering and go-to-market teams; and scaling through early sales, AI infrastructure expansion, revenue experiments, and fundraising preparation. It also provides hiring and fundraising support across a venture's lifecycle.

On the investment side, Attack Capital runs an AI fund positioned as an accessible vehicle for investors to reach Y Combinator companies, which it describes as otherwise hard to access because YC Demo Day is limited to a curated investor list. The fund makes pre-seed and seed investments in YC companies with an AI-first portfolio selection approach, and offers follow-on support and network introductions. Its stated focus areas are vertical SaaS in large, process-heavy industries, including healthcare, legal, logistics, finance, compliance, sales infrastructure, revenue cycle management and payments technology, operational AI, agent-based workflows, and AI infrastructure and automation tooling.

Business model

Attack Capital combines a venture studio that co-creates and operates AI SaaS ventures with an investment fund that deploys capital into pre-seed and seed rounds of Y Combinator-backed and other AI startups, acting as both builder and investor.

As a studio and fund, Attack Capital takes positions in the ventures it builds and the startups it invests in, offering investors participation in its YC-focused investment vehicle.

Traction

The website lists built and backed companies including HealOS (AI healthcare agents automating documentation, billing, insurance, and patient interactions), Andromeda Surgical (autonomous AI surgical robots), PowerDialer (YC-backed AI sales dialer), Hadrius (AI SEC compliance automation), and Middleware (AI-based observability platform). Investor testimonials are attributed to Cory Hill, formerly an engineer at Facebook, and Varun Villait, CPO of People Data Labs.