Operator Partners

Zach Weinberg


Before co-founding Flatiron, Zach was Co-Founder, President & COO of Invite Media, an advertising technology company based in NYC. Invite Media built the industry's first enterprise advertising platform for buying and optimizing online media in real-time. Invite Media was acquired by Google in 2010.

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Notable Investments

Daloopa, Radar, Tropic, David Energy, Ergatta, Remote, Flatfile

Questions & Answers

Origin Story: In a couple sentences, how would you describe your path to becoming an investor?

Entrepreneur -> Angel Investor

Investment Approach: What are the key factors you consider when evaluating a founding team?

For seed / early A's, ability to stretch up and down. Up to markets / competitors / sales strategy / pricing etc. Down to product features, technical stack, understanding software tradeoffs. Ideally founder can do both in the same person. Assuming that baseline is true, then look at market size, ability to be a monopoly etc. Criteria changes to be much more data driven later stage.

What's your style and approach when it comes to working with founders post-investment? What are the characteristics of founders you've worked well with?

Hand them my cell phone and let them text/call me literally anytime. Reply ASAP, ideally within 2 hours.

If I'm coming to pitch to you, what's the one piece of advice you'd give me?

Know the details.

As an angel investor, how many deals do you aim to do each year?


What do you like best about investing in NYC, and what’s your outlook on the future of NYC tech?

NYC founders tend not to think that tech is the answer to the world's problems. Much more practical.