hey, I'm Yoann

I help deeptech founders raise the round and become the category leader.

Eight years on the investor side. 47 investments. Now I sit on your side of the table. When you are stuck before or during a Series A or B, I bring the right people to the exact problem, and we fix it together.

Want to chat? →Read what founders say

Yoann Berno recording the Climate Insiders podcast — on the mic, Climate Insiders podcast

Yoann's details

Based in: Lisbon, Portugal
From: France
Before: Software engineer, climate VC
Now: Climate Insiders, VC Boom, All-Star
Investing in: Deeptech category leaders
Ask me about: Your round, your story, your investors

Mood: very bullish on the grid

By the numbers

47investments made from the investor side

$67Mraised by founders we backed and supported

98%of our syndicate rounds oversubscribed

19K+founders and investors read the newsletter

42%open rate, every week

4.9/5from 74 ratings on my Maven course

#1 Climate Tech creator, FavikonLinkedIn Top VoiceSubstack BestsellerPodcast in the top 7% worldwide

the long version, short

How I ended up on your side

I started as a software engineer in Silicon Valley. Then I built a cleantech business in Kenya.

Then I switched seats. I joined a VC fund in Berlin, then co-founded Climentum Capital, a €150M climate tech fund. In five years I built a portfolio of 30+ startups. When Keiran at Entocycle raised his Series A, I helped him close it, with Climentum leading the round.

Along the way I started writing everything down. That became Climate Insiders: a newsletter, a podcast, and a community of people who actually build this stuff.

All-Star is what I wish every founder had: someone who has seen hundreds of rounds from the inside, plus the right expert for the exact thing that is blocking you.

Yoann

Silicon ValleySoftware engineer
KenyaBuilt a cleantech business
BerlinJoined a VC fundThe other side of the table.
Climentum CapitalCo-founded a €150M climate tech fund30+ startups in five years.
EverywhereClimate InsidersNewsletter, podcast, 80K+ on LinkedIn.
Today, LisbonAll-StarYour round, with an all-star team behind it.

Yoann's Top 8

KeiranEntocycle

ManouAnodyne Chemistries

Chern-HooiNew Iridium

CimberleyAccelerate Health

AndresStrong By Form

JackHephaestus Fusion

FrancescaFounder member

ThomasFounder member

Founders I backed, advised or brought into the room.

the comments section

Founders, in their own words

Six founders I worked with on their rounds. Not a script, not an agency. Their words.

Keiran WhitakerFounder, Entocycle

“I don't think we would have been able to close our Series A without Yoann. His network in the Climate sector is unparalleled.”

$5M Series A

Andres MitnikFounder, Strong By Form

“Within a span of less than two months, he confirmed the investment and promptly connected us with some of the top investors in the industry. Available, strategic, and empathetic.”

Seed, 10 investors

Chern-Hooi LimCEO, New Iridium

“Our Seed success story is closely tied to Climate Insiders and his exceptional network within the Climate Tech domain.”

$2.65M Seed

Cimberley GrossManaging Director, Accelerate Health

“I tried the usual LinkedIn outreach, DM by DM, no result and super frustrating. This helped me reframe my background as the moat.”

$1.2M Seed

Manou DaviesCTO, Anodyne Chemistries

“Grateful for Yoann's patience to help fine tune our pitch and introductions to amazing VCs!”

$6.2M Seed

Jack ZamattioFounder, Hephaestus Fusion

“His extensive network in the Climate sector is like a golden ticket to all major funds.”

Pre-seed closed

and from people who took my climate VC course ↓

Helena Tyszka PowellCourse student

“Tangible tools shared generously; worth months of research.”

Michele MorabitoCo-founder, Climate Angel Fund

“Real-life case studies help put oneself in investor's shoes.”

Kenan HodzicVP Engineering

“Incredibly comprehensive and accessible introduction to climate investing.”

Some of the founders I backed:

from my notebook

What I've been writing

Read all on Substack →

Feb 2026♥ 23

I write about climate. Somehow this blew up.

A 3 minute read, with the screenshot that started it.

Mar 2026♥ 46

Europe's quiet outlier

They cracked energy pricing. Nobody talks about it.

May 2026♥ 34

The warning shot

Spend or die. $725B says it.

May 2026♥ 26

Climate is dead?

Apparently nobody told Wall Street.

Sep 2026♥ 30

I'll confess

Al Gore confused the hell out of me this week.

Nov 2025♥ 10

Forget COP30.

This is where climate tech gets real.

on the mic

Listen, or watch me talk

The Climate Insiders podcast grew into the top 7% of podcasts worldwide. The best part: I get to ask the people I admire the questions founders are too polite to ask.

Guest on Finscale: cracking the code of green investments.

Inside Breakthrough Energy, with Allegra Kowalewski-Ferreira

Carbon Equity CEO Jacqueline van den Ende

Plan A CEO Lubomila Jordanova

Marie Ekeland of 2050 on a new VC model

Chad Frischmann, the OG of Project Drawdown

Extantia co-founder Sebastian Heitmann

Carbon removal decoded, with CDR.fyi

Switching seats: my own climate story

the short stuff

What I post every day

Climate solutions that make you stop scrolling. On YouTube, Instagram and TikTok.

find me

Where we can hang out

LinkedIn80K+followers Substack19K+readers Instagram32K+followers PodcastTop 7%worldwide YouTube + TikTokDailyshorts

the day we announced the fund ↓

the day we opened the investor community ↓

Partners, sponsors and stages:

The Ocean CleanupNotplaSOSV Climate Tech SummitGreenlyOverstoryHello TomorrowMaven

so, what is All-Star?

Your round, with an all-star team behind it.

For deeptech category leaders raising a Series A or B. Tell me where you are stuck. I put the right expert on it, for exactly as long as it takes. One fixed fee. No success fees.

1Assessment15 minutes to find the real gap.

2Pick your line-upOnly the experts you need.

3UnlockStory, pitch, team, investors.

4CloseThe round, and the next one.