Zachary
Bratun-Glennon

Somewhere between a quant trading energy derivatives, a UCLA law student, and the Google exec cutting M&A deals for Cloud, there's Zachary Bratun-Glennon - known universally as Zach. He arrived at Gradient Ventures in 2017, back when betting on AI startups at pre-seed felt more like a leap of faith than a thesis. Seven years later, it looks like strategy.

In October 2025, Gradient elevated him to General Partner, a title that came with context: the firm was quietly engineering its own independence, stepping out from Google's shadow so that founders - those who balk at taking strategic capital from a tech giant - would feel genuinely free to take a check. Zach is one of the architects of that shift.

His path into venture capital is almost deliberately indirect. He started as a quant and data engineer at an energy trading hedge fund - not the typical VC origin story. Then law school at UCLA. Then the Anderson MBA. Then investment banking, where he advised major software and internet companies on IPOs, M&A, and capital raises. Then Google's Corporate Development team, where he led acquisitions and strategic investments across Cloud, Ads, and Commerce. He also co-founded a social media startup somewhere in there, which is why founders often remark that he asks better questions than most investors on the other side of the table.

The portfolio Zach has assembled reads like a primer on where AI infrastructure is heading. Lambda - GPU cloud for deep learning - quietly became the backbone that thousands of AI teams run on. Openly upended property insurance with machine learning. Rad AI is automating radiology reporting. CentML is slashing the cost of running large models in production. Stack AI is dragging enterprise workflows into the AI era without requiring a PhD to operate. Each bet follows a pattern: find the company solving the hardest infrastructure or workflow problem in a vertical, before the market consensus arrives.

He invests across pre-seed, seed, and Series A - the stages where the thesis is still half-formed and the spreadsheet is mostly aspirational. His sweet spot is $5M, but he's been in at $1M when the conviction was high enough. The stage discipline is deliberate: by the time a company has Series B momentum, the insight that creates the return has usually been priced in.

What Zach brings beyond capital is a technical foundation that's genuinely rare. A bachelor's in Computer Science and Applied Mathematics from the University of Virginia means he can read a model architecture spec without a translator. The JD means he understands term sheets from the inside out. The Google Cloud M&A experience means he knows how large acquirers think - which is exactly the information founders need when they're deciding whether to raise, sell, or push for an IPO.

He has a reputation for backing diverse founding teams and female founders at a stage when most funds are still mostly saying no. This isn't a checkbox - it's a sourcing strategy. The companies others overlook don't get bid up in competitive rounds. He's been consistent about it long enough that it shows up in his track record.

When he's not in a board meeting or reviewing a deck, Zach is in the mountains. He snowboards and mountain bikes with the kind of regularity that signals genuine commitment rather than casual interest. He lives in San Francisco with his wife and two kids. The outdoor habits track with the way he invests: high-consequence, deeply considered, and never passive.

Gradient Ventures raised $220 million in March 2026 - a signal that Google's AI fund isn't a side project. With 177 portfolio companies, four unicorns, and a freshly independent General Partner in Zach Bratun-Glennon, the next chapter is already in motion. The companies he backed at pre-seed are starting to matter at scale. The ones he backed last year are the ones to watch now.