# Berk Ozer

> Berk Ozer is a YC S21 founder, angel investor, and product builder based in San Francisco.

## About

Berk Ozer is a founder, angel investor, and product builder based in San Francisco. He has spent most of his career building products, and some of it backing people who build them.

Previously, he co-founded SenpAI (YC S21), a real-time AI gaming coach. The company shipped "ChatGPT for gamers" in 2019, three years before the LLM wave hit the mainstream, and scaled it to 500K monthly active users with near-zero ad spend.

At Orange DAO, he invested in 150 startups and worked closely with founders on product, distribution, and fundraising. The portfolio went on to raise $100M+ in follow-on funding. He now works hands-on with early-stage founders through Superpath and helps scientists and deep tech teams use AI through [Reactorfield](https://reactorfield.com).

## Links

- Website: https://berkozer.me
- Blog: https://berkozer.me/blog
- X/Twitter: https://x.com/berkbuilds
- LinkedIn: https://linkedin.com/in/ozerberk
- GitHub: https://github.com/berkozero
- Email: berkozer@gmail.com
- RSS: https://berkozer.me/feed.xml

## Experience

- [Reactorfield](https://reactorfield.com) (2026–Present): Founder. Helping scientists and deep tech teams use AI the way frontier labs do.
- Superpath (2025–Present): Founder. Works hands-on with early-stage founders on fundraising, distribution, and product.
- Orange DAO (2023–2025): Head of Venture & Product. Led 40+ reviewers, evaluated 8,000+ startup applications, built portfolio of 150+ companies. Organized Demo Days with 500+ investor attendees including a16z, Paradigm, and Coinbase Ventures.
- SenpAI, YC S21 (2019–2024): Co-Founder & Head of Product. Built real-time AI gaming coach pre-GPT era. Scaled to 500K+ MAUs and 4M+ games analyzed monthly. Raised $3.1M seed.
- FashionI (2017–2019): Co-Founder & Head of Product. AI fashion assistant with 20,000+ WAUs. Featured by Apple as "Try Something New."
- Deloitte Digital (2016–2017): Management Consultant. Led C-Suite workshops on AI, IoT, and Blockchain.

## Blog Posts

- [Fundraising Mistakes I Only Realized After Switching to the VC Side](https://berkozer.me/blog/fundraising-mistakes-from-vc-side): Lessons from raising $3M+ as a YC founder, then switching to the VC side and reviewing 8,000+ startup applications.
- [12 Tips to Nail the Y Combinator Interview](https://berkozer.me/blog/12-tips-to-nail-yc-interview): YC interview tips from a YC graduate — what to expect, how to prepare, and how to stand out.

## Useful Around

- Fundraising: Raised as a founder and reviewed thousands of startups from the investor side. Helps founders turn messy traction, timing, and ambition into a story people actually lean into.
- Distribution: Early-user and growth loops across product, community, sales, and founder-led motion.
- Product: AI product taste, scope, and what is worth shipping now versus what is just clever.

## Contact

To reach Berk Ozer, DM him on X (@berkbuilds) or email berkozer@gmail.com.