Leo Polovets is a venture capital investor at Susa Ventures who was the second engineering hire at LinkedIn (joining when the company had ~12 people) and built early core products like Jobs and Groups before working on payments fraud at Google and big data infrastructure at Factual. He's known as the "Coding VC" for his engineering-style approach to venture capital, publishing detailed frameworks on his blog and systematically evaluating startups as "bundles of risks" that founders should de-risk rather than just chasing growth metrics.
What they've been talking about across their social media accounts

- Strong conviction in deep tech, hardware, and the reindustrialization of physical infrastructure. Frequently highlights investments in sectors that involve building tangible things rather than just software, such as nuclear energy startups like Antares Nuclear, space technology firms like Northwood Space, and lithium enrichment companies.
- Valuation of high-velocity execution and tangible progress in founders. Appreciates teams that can achieve significant milestones rapidly, such as a nuclear startup securing fuel and government contracts within two years, or an ag-tech founder deploying hardware cameras to farms months before a seed round.
- Interest in robotics and automation that solve physical labor or logistics problems. Actively invests in and discusses humanoid robots, automated storage and retrieval systems for heavy packages, and ultralight drones that can drastically reduce delivery costs.
- Emphasis on founder "hyper-fluency" and deep operational involvement. Looks for entrepreneurs who understand every aspect of their business, from hardware and software to customer needs, citing a specific example of a founder who relocated their entire team to Washington state to be closer to their agricultural customers.
- Willingness to break traditional investment rules for exceptional founders and visions. Admitted to ignoring his own firm's restrictions regarding geography and sector—specifically avoiding non-US companies and small drones—to invest in an Indian ultralight drone delivery startup because the founder's vision was too impressive to pass up.
- Support for founder mental health and sustainable company building. Advises entrepreneurs to avoid burnout, emphasizing that investors need outliers rather than founders who destroy themselves for marginal returns, and encourages cutting off poorly performing initiatives early to save resources.
- Focus on energy innovation and resilience. repeatedly shares enthusiasm for advancements in the energy sector, including geothermal power plants and the rapid emergence of new nuclear technology startups participating in Department of Energy programs.
Video Interview
On what founders get wrong when crafting their cold outreach
"I think probably the biggest mistake on cold emails is going too long or explaining too much versus just being like, hey, I previously sold a company for 30 million and I know this space like the back of my hand cause I worked here and we've already got our first three pilot customers. Like that's a perfect cold email. It's really short and succinct, but very compelling."
On why chasing uninterested investors is a trap
"If they just don't seem that into it, they're like, ah, it's not for me. Like, you're probably nowhere near the top 1% for them. And even if you can convince them that you're not 50th percentile but really 80th, like they're still not going to invest, but you're going to burn a lot of cycles."
On the hidden risk of taking a multi-stage fund check at seed
"15% of the time, that's the fund that led their A. So it's sort of like, you know, being a great company and us being lucky enough to work with you, we can help you find a great Series A investor, but it's actually more likely not going to be the multi-stage fund that did your seed round. And additionally, them not doing your Series A is going to make it harder for you to raise a Series A from everyone else, cause they're going to wonder like, why isn't the insider doing anything?"
On the kind of founder that genuinely inspires confidence
"Sometimes you get like this rare gem of a founder where you could be like, let me ask you about the technical side or the business side or the regulatory side or the history of the industry. And they just know it all. And that's always a very, like, awesome confidence inspiring thing."
On the underrated power of regular investor updates
"If you're doing regular updates, even if you're like doing decent, people appreciate the communication. They're more likely to give you a bridge round, or if you're doing great, they're gonna mention you to all their friends, because they hear every month how great you're doing."
About their Fund
Sectors
Deeptech / Hardware, Robotics, Biotech, Defense, Climate
Rounds
Pre-Seed - Seed
Avg Check Size
~$750K
Notable Investments
Humba Ventures is a seed fund that focuses exclusively on hard tech and hard sectors like nuclear reactors, surgical robots, and industrial batteries—categories most VCs avoid—while offering unusually strong follow-on support that aims to bring in $2-3 from other investors for every $1 they invest. The fund operates a formal Deep Tech Fellowship that embeds external scientists and engineers directly into their investment decisions, turning the fund into a training and community hub for future deep-tech founders rather than just a capital provider.
Other partners at the fund
Notable Fund
Investments
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Popular Investors
investor name
Active in
Rounds
Avg. Check
Links
Deeptech / Hardware
Robotics
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12
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Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
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Defense
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7
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Defense
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Unknown
Pre-Seed - Series A
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$100K - $5M
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Biotech
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Deeptech / Hardware
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2
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Unknown
Pre-Seed - Seed
Unknown
$250K - $2M
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Climate
Deeptech / Hardware
Materials
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4
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Unknown
Pre-Seed - Seed
Unknown
$400K - $1.5M
Unknown
Deeptech / Hardware
Robotics
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7
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Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Fintech
Deeptech / Hardware
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2
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Unknown
Pre-Seed - Series A
Unknown
$250K-$1M
Unknown
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