How to Evaluate Climate Deep Tech Startups: Andrew Eil’s Playbook
Originally sent to Play Money subscribers · December 2025
Part of our ongoing series highlighting the frameworks and operators behind some of the highest-conviction deals on Play Money.
---
💎 If you’ve invested in Aquaria, Mothership Materials, Carbon Bridge, or Tikal Industries, you’ve already seen Andrew Eil’s fingerprints.
These are companies we’ve hosted on Play Money in the past, and the consistency is not accidental.
When people like Andrew get to do what they’re best at — applying deep domain expertise to early-stage climate technologies — everyone wins.
My 30-minute call with him lasted nearly two hours.
I left convinced I want to invest in every deal he brings to the platform.
Enjoy.
— C2K
Why Climate Deep Tech Investing Is So Hard to Get Right
Most VCs say they invest “early.”
Almost none of them are willing to fund the moment that actually matters in climate deep tech:
The messy, expensive leap from lab to first real customers.
That’s the gap Andrew lives in.
He has spent nearly 20 years in climate finance, technology, policy, and risk — working with governments, development banks, corporates, and founders to answer one hard question:
Which climate technologies actually have a shot at becoming big, durable businesses?
Today, he turns that playbook into sourcing and leading some of the highest-conviction climate deals on Play Money.
How Andrew Eil Evaluates Climate Deep Tech Startups
Here’s how Andrew describes the companies he loves:
1️⃣ Deep Tech Climate Startups
The science is already de-risked — often backed by millions in grants.
The real challenge is commercialization.
Not “can the physics work?”
But “can this become a business?”
2️⃣ Climate Business Models That Don’t Rely on Subsidies
If a business only works with subsidies or fragile policy support, he passes.
Climate may be the mission.
But customers must buy for hard-nosed cost, risk, or operational reasons.
No green premium.
Green and cheaper.
3️⃣ The 50% Cost Rule in Climate Technology Investing
He looks for 50% cheaper.
Or an order of magnitude better.
Often enabled by:
- Waste feedstocks
- Modular production
- Novel processes
Incremental improvement doesn’t win.
Structural advantage does.
4️⃣ Investing in Climate Startups Solving Urgent Problems
AKA Hair-on-Fire Problems
If no one in the C-suite is losing sleep over the problem, he’s not betting capital on it.
Mission-driven is not enough.
Urgency matters.
A Founder Trait Most Climate Investors Misread
Founders with “too many” potential markets.
Where others see lack of focus, Andrew sees resilience.
If the tech can win in multiple verticals, the company has life rafts if the first go-to-market fails.
The key is:
A clear first beachhead.
Plus credible backup paths.
Not a brittle single bet.
How to De-Risk Climate Deep Tech Startups
Andrew isn’t a traditional fund manager.
He operates like a fractional risk officer embedded with early-stage teams.
Here’s what that looks like.
How to Structure the Capital Stack in Climate Startups
Instead of “raise a $2M seed with a lead,” he asks:
What milestones actually de-risk this company?
Pilots?
First contracts?
Bankability?
Then he matches capital sources accordingly:
Angels
SPVs
Grants
Corporate pilots
Strategic partners
Scenario Analysis for Climate Deep Tech Startups
What if policy flips?
What if input costs swing 20%?
What if supply chains fracture?
If the answer is “we only win if everything goes perfectly,” he walks.
Commercializing Deep Tech Before It’s Perfect
He borrows from software:
Rapid prototyping.
Early customer feedback.
And forces deep-tech founders to test real market demand before burning years perfecting lab work.
Founders who pass that bar don’t just get capital.
They get an advocate.
Why Play Money Is Backing Climate Deep Tech Deals
You’ve already seen Andrew’s lens applied to companies we’ve hosted on the platform like Aquaria, Mothership Materials, Carbon Bridge, and Tikal.
The consistency of quality isn’t luck.
It’s the product of two decades spent studying exactly how climate technologies fail to scale — and building a checklist to find the rare ones that can.
Over the next few months, you’ll see more “Andrew deals.”
And more behind-the-scenes education on how he thinks.
Because climate deep tech can feel “too technical.”
It doesn’t have to be.
If you care about climate — and believe in backing real companies with real moats — this is where things get interesting.
👉 Read the full conversation with Andrew.
---
Play Money makes angel investing accessible by helping everyday angels build diversified startup portfolios without turning it into a full-time job.
If you want weekly thinking like this in your inbox, you can do so below.