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Water Horizon

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Developing an industrial transportable thermal battery for industrial heating and cooling applications.

Toulouse, FranceFounded 2017Energy
Valuation $100–250M Last recorded · 2025
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Water Horizon and the history behind them.

About Water Horizon

Water Horizon is a pioneering company in the renewable energy sector, specializing in the development of advanced thermal batteries for industrial heating and cooling applications. Operating primarily in the industrial sector, Water Horizon serves large energy consumers who are looking to transition away from fossil fuels and reduce their greenhouse gas emissions. The company's core technology involves a transportable thermal battery that recovers waste heat from industrial activities, stores it with high density, and delivers it without any loss of energy over time. This solution is particularly beneficial for extending the reach of existing heating networks or creating new ones in areas where underground piping infrastructure is not feasible.

Water Horizon's business model revolves around the sale and distribution of these thermal batteries, providing a unique renewable heat or cold supply to its clients. The company generates revenue through the direct sale of its thermal batteries and potentially through long-term service agreements for maintenance and support. By offering a comprehensive solution that includes heat recovery, storage, and delivery, Water Horizon helps its clients achieve significant cost savings and environmental benefits.

The market for Water Horizon's solutions includes industries with substantial heating and cooling needs, such as manufacturing plants, sports complexes, and other large facilities. The company's innovative approach allows it to decouple energy production and consumption over time and space, providing a flexible and efficient energy solution.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2017
Headquarters
Toulouse, France
Employees
37
Open positions
12
Dealroom signal
79.4/100
Sub-industry
Energy Storage
Sector
Energy, Spinout, Sustainable Development Goals, Thermal Energy Storage, Climate Tech, Energy and Greentech, Observatoire Deeptech, Greentech, Seal of Excellence EC, Industrial Electrification
Technology
Hardware, Deep Tech
Business model
Manufacturing
Client focus
b2b

Funding history

7 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
EARLY VC✓Equity / VC Dec 2025 $20M $79M Eren Groupe · Banque des Territoires · Delmas Investissements & Participations ↗
GRANTOther financing May 2024 $11K — Next Innov Prize ↗
Showing the latest 2 of 7 recorded eventsBook a demo for the full funding history →

Financials

Revenue, earnings and profit over time

Revenue, earnings and other financial measures where available. Years marked “E” are estimates.

YearProfitMargin
2026 —
2025 —
2024 —
2023 —
2022 —
2021 —
2020 —
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Growth signals

Water Horizon website traffic

Latest recorded traffic for Water Horizon is 2.6K monthly website visits, up 136.4% over the last three months. Water Horizon's team grew 8.8% over the past year.

Latest monthly visits2.6K 3-month web change+136.4% 1-year team growth+8.8%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

11 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed3 investors entered at this stage

  • EU Innovation Fund
  • Banque des Territoires
  • Next Innov Prize

Series A2 investors entered at this stage

  • Eren Groupe
  • Delmas Investissements & Participations

Other known investors6 additional known investors

  • HEC Paris
  • HEC Challenge+
  • Toulouse Institute of Technology - Toulouse INP
  • University of Toulouse
  • EVOLEN
  • Plug and Play
Team profiled 2 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 1 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
2 countries with
team presence
🇫🇷 France96.9%
🇪🇸 Spain3.1%
2 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Water Horizon on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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