51 YC Energy Startups (Industrials)

51 YC companies fall under Energy, YC's Industrials subcategory, across every batch since 2005. Each row shows the one-liner, batch, HQ and status, and links to a reconstruction of the company's YC application in the real form.

Companies
51
Top locations
San Francisco, Austin and Remote
YC top companies
2
51 reconstructed applications

Read the YC application of all 51 companies

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The first 51 companies, top companies first

1
Moxion Power Co.
Moxion Power Co.TopMobile Energy Storage Technology
Winter 2021Richmond, CAInactive
3
Apollo Atomics, Inc.
Apollo Atomics, Inc.We make the most compact nuclear machines.
Spring 2026Cambridge, MAActive
4
Astro
AstroThe world’s first AI energy developer
Winter 2025New York City, NYActive
6
Atomarine
AtomarineFloating nuclear powered data centers at sea.
Summer 2026San Francisco, CAActive
8
Bright
BrightSunrun for the developing world
Winter 2015Mexico City, CDMX, MexicoActive

That is 10 of 51.

Every company below has its YC application reconstructed in YC Insights. Create a free account to read them all.

Read all 51 applications
11
Dartboard Energy
Dartboard EnergyAI Analyst for Electricity Markets
Winter 2025San Francisco, CAActive
12
Enode
EnodeAn API for electric vehicles and other energy hardware (DERs)
Winter 2021Oslo, Oslo, NorwayActive
13
Evoly
EvolySmart electric & water meters as a service
Summer 2022Remote, ORActive
15
Gridware
GridwareProtecting the grid today, preparing the grid for tomorrow
Winter 2021San Francisco, CAActive
17
Helion Energy
Helion EnergyBuilding the world's first fusion power plant
Summer 2014Seattle, WAActive
22
Kapacity.io
Kapacity.ioReducing energy costs & emissions in buildings.
Summer 2021Helsinki, FinlandAcquired
23
Kitekraft
KitekraftBuilding flying wind turbines.
Summer 2019Munich, BY, GermanyActive
24
Madrone
MadroneMaximizing compute via hyper-efficient cooling
Spring 2026Mountain View, CAActive
25
Maingen
MaingenSimulating Agents Running Industrial Companies
Summer 2026San Francisco, CAActive
26
Marengo
MarengoAI-Native Engineering Firm designing Data Centers
Summer 2026San Francisco, CAActive
27
Maritime Fusion
Maritime FusionFusion reactors for ships
Winter 2025San Francisco, CAActive
30
MineralSoft
MineralSoftData management platform for oil & gas assets
Winter 2016Austin, TXAcquired
32
NextDrop
NextDropNextDrop is the water marketplace for urban India. We connect water…
Summer 2017Bengaluru, KA, IndiaInactive
34
Oolu
OoluOolu is one of the fastest growing off-grid solar firms in West Africa
Summer 2015Dakar, Dakar Region, SenegalAcquired
35
Phoenix Hydrogen
Phoenix HydrogenFirst commodity marketplace for hydrogen.
Winter 2022Berkeley, CAInactive
36
PowerMatrix
PowerMatrixEfficient and compact power supply for AI hardware
Spring 2025London, United KingdomActive
38
Reach
ReachLong range, wireless energy distribution that scales
Summer 2015Redwood City, CAActive
40
RoboDock
RoboDockRobots that run autonomous depots for autonomous fleets.
Winter 2026San Francisco, CAActive
41
SINAI
SINAIEnterprise software to quantify cost-effective decarbonization…
Winter 2020San Francisco, CAActive
42
Squid
SquidAI agents for power grid planning 🦑
Winter 2026London, United KingdomActive
43
Statiq.
Statiq.India's Largest EV charging network
Summer 2020Gurugram, HR, IndiaActive
45
Talos
TalosPredictive maintenance for power infrastructure.
Fall 2026Baltimore, MDActive
46
Terranox AI
Terranox AIThe first AI-powered uranium discovery company
Winter 2026San Francisco, CAActive
47
Validere
ValidereA carbon MRV solution for energy and hard-to-abate sectors
Summer 2016Toronto, ON, CanadaActive

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About this list

This list is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise.

Frequently Asked Questions

How many Y Combinator companies are in Energy (Industrials)?

This directory lists 51 YC companies in Energy (Industrials), out of 6,207 across every batch since 2005. The count updates when the directory is refreshed, and every one of them is on this page with a link to its public profile.

Are the YC applications on these pages real?

No. YC keeps submitted applications private. Every application linked from this list is a reconstruction: the real YC form questions, answered from the company's public data. The Company section is free on each page; the rest opens in YC Insights.

Which companies on this page are best known?

Moxion Power Co. and Oklo lead the table above. YC marks 2 of the 51 companies here as top companies, its own list of the highest-valued and highest-revenue alumni.

How do I use this list when applying to YC?

Pick five companies on this page whose product is closest to yours, read their reconstructed applications side by side in YC Insights, and note how each answers the same question. Then write your own answers to that standard.

Where does this data come from?

From YC's public company directory, refreshed by batch, with each company's status, industry and location as YC reports them. Round Funded adds the reconstructed application and the founder profiles; nothing private is published.

What is Round Funded?

Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.