Best Energy Tech Companies in Tallinn, Estonia
The 66 best Energy Tech companies in Tallinn, Estonia in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Elcogen.
Our analysis of 287 Energy Tech companies
$109.4b in tracked funding; 82% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy Tech companies in Tallinn
| # | Company | Revenue | Disclosed funding | Employees | Founder | Tech stack | Web popularity | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Dussmann Service Cloud-based energy management solution for facility management | $16M FY2022 | — | 557 | — | — | — | — |
| 2 | Elcogen Manufacturer of solid oxide fuel cells and hydrogen production components | $8M FY2024 | $98M | 21 | Enn Õunpuu CEO | WordPressMySQLPHP+31 | Top 10M | 2 launchs · 1 expansion · 1 award |
| 3 | DeltaE Provider of energy and resource efficiency solutions for businesses. | $3M FY2022 | — | 32 32 → 23 (-28%) | — | WordPressMySQLPHP+31 | Top 50M | — |
| 4 | FirstEV Online platform providing electric cars | $2M FY2023 | — | 1 | Sander Kodanik Founder | Shopifycore-jsPriority Hints+9 | Top 10M | — |
| 5 | Bikeep Manufacturer of bike and scooter parking and charging infrastructure systems | $2M FY2022 | — | 20 20 → 30 (+50%) | — | WordPressMySQLPHP+29 | Top 5M | 1 partnership · 2 expansions |
| 6 | Airexa Provider of ventilation, cooling, and HVAC systems | $1M FY2023 | — | 1 | Ingrid Salk Founder / CEO at Airexa OÜ | — | — | — |
| 7 | Brightlux Group Provider of LED lighting solution | $552K FY2023 | — | 2 | Jost Sisask CEO | — | — | — |
| 8 | Electric Beast App-based electric car rental platform | $488K FY2023 | — | 6 | — | — | — | — |
| 9 | Akukeskus Provider of batteries | $445K FY2023 | — | 1 | — | WordPress Block EditorElementorWordPress+27 | Top 5M | — |
| 10 | Hepta Insights Provider of smart power line inspection solutions | $372K FY2022 | $3M | 7 | Siim Heering Co-Founder | — | — | — |
| 11 | AirPatrol Developer of smart connected devices for homes | $360K FY2023 | — | 2 | Daniel Dordett Founder & CEO | — | — | — |
Top 12 Energy Tech companies in Tallinn
#1
Series A · Tallinn, Harju County · founded 2020 · 15 employees$44.8Mraised▾
Manufacturer of alkaline electrolyser stacks and containerised hydrogen production systems. The company provides stacks for system integrators and containerised systems. The systems are for hydrogen production. The company focuses on electrolysis technology for green hydrogen production. They offer engineering support to assist clients with hydrogen projects. The company develops catalyst materials for electrolysis.
- Jul 2025Series A—
- Mar 2025Series A$11.5M
- May 2024Grant (prize money)—
- May 2024Seed$44.8M
#2
Series B · Tallinn, Harju County · founded 2001 · 21 employees$98.1Mraised▾
Manufacturer of solid oxide fuel cells and hydrogen production components. These products include cells, stacks, and modules designed for integration into systems that generate power or produce hydrogen. The technology utilizes electrochemical processes to convert fuel into electricity or facilitate electrolysis. These components support systems requiring high efficiency for energy conversion and gas processing applications.
- Jan 2025Series B$5.2M
- Nov 2024Grant (prize money)$26.6M
- Apr 2024Series B$25.8M
- Apr 2024Conventional Debt$16.1M
#3
Seed · Tallinn, Harju County · founded 2023$4.6Mraised▾
Soldera unifies the world's fragmented renewable energy certificate registries into a single platform. Companies and producers access Guarantees of Origin, I-RECs, and other Energy Attribute Certificates across all jurisdictions through one virtual account, eliminating the need to navigate dozens of separate national registries. The platform automates compliance workflows for GHG Protocol, RE100, and CSRD, provides transparent pricing from 4,000+ aggregated producers, and delivers audit-ready retirement documentation. For producers, Soldera automates registry interactions and maximizes certificate revenues through aggregated tenders and forward trading strategies.
- Jan 2026Seed$1.9M
- Mar 2025Seed$2.7M
#4
Series A · Tallinn, Harju County · founded 2019 · 20 employees$5.1Mraised▾
Retailer of electric bikes and related accessories for personal transport. It provides various models of electric bikes designed for commuting and leisure. The company also offers a selection of components, replacement parts, and riding gear. It aims to provide options for individuals seeking alternative transportation methods.
- Jul 2025Series A$6M
- Jun 2023Seed$4.2M
- Jun 2023Grant (prize money)$328K
- 2022Seed—
#5
Seed · Tallinn, Harju County · founded 2018 · 30 employees$3.6Mraised▾
EV charging solution. It offers reliable, smart, and cost-effective charging for both business and private customers. It provides chargers that are efficient, save money, and have a sleek design.
- May 2025Seed$1.7M
- May 2024Seed$323.1K
- Sep 2023Seed$1.4M
- Sep 2023Grant (prize money)$1.7M
#6
Seed · Tallinn, Harju County · founded 2023$4.2Mraised▾
Provider of software-based dynamic line ratings for power grid optimization. It provides users with solutions that rethinks how existing power grids are utilized, making them smarter and more adaptable. It enhances the capacity of overhead lines without requiring new infrastructure, which assists in alleviating bottlenecks, reducing costs, and expediting grid expansion for operators, producers, and consumers. The solution leverages precision weather forecasting and hyper-local weather artificial intelligence, ensuring high accuracy, resolution, and availability, while identifying critical spans and implementing ratings across all lines.
- Feb 2025Seed$4.2M
#7
Seed · Tallinn, Harju County · founded 2014 · 20 employees$3.6Mraised▾
Provider of solutions for virtual power plant management. It integrates consumers and energy systems to enable better integration of renewables and reduce CO2. It also provides solutions for virtual power plants, demand response, and revenue management.
- Jan 2025Seed$2.7M
- Dec 2022Seed$3.6M
- 2021Seed—
#8
Seed · Tallinn, Harju County · founded 2019 · 4 employees$348.1Kraised▾
AI-powered energy optimizer for solar panels and batteries. It automatically selects the best energy source hourly—buying low, selling high, storing smart, or activating grid flexibility services—factoring in market prices, home use, and solar production.
- Oct 2025Seed$348.1K
#9
Seed · Tallinn, Harju County · founded 2018 · 9 employees$978.4Kraised▾
Developer of application that automates electric vehicle charging based on tariffs. The application connects to car manufacturer cloud services, enabling smart charging based on energy prices and solar power availability. It integrates with various car brands and solar inverters, offering users control over charging schedules. The application aims to save users money and reduce carbon footprint.
- Jan 2025Seed$2.5M
- Oct 2022Seed$978.4K
- Dec 2019Seed—
#10
Seed · Tallinn, Harju County · founded 2013 · 7 employees$2.6Mraised▾
Provider of smart power line inspection solutions. It provides end-to-end inspection solution for large networks from smart software and rich analytics to hands-on support from specialists and hardware facilitation. It offers features such as AI-driven defect detection, overview of the state of your grid, and more.
- Feb 2024Seed—
- Feb 2021Seed$2.4M
- Jul 2020Seed$159.4K
- Jun 2019Grant (prize money)$470.3K
#11
Seed · Tallinn, Harju County · founded 2015 · 1 employees$1.4Mraised▾
Provider of smart thermostats. It offers Themo - digital thermostat which takes into account real-time electricity spot price, outside weather, preset temperature levels, and the unique consumption profile.
- Mar 2024Seed$1.4M
- 2016Grant (prize money)$4.7K
#12
Seed · Tallinn, Harju County · founded 2013$2.9Mraised▾
App-based platform for renting cars. They provide electric and hybrid vehicles. Users can rent the cars through the platform by providing user details, payment details, and more. Their app is available for both Android and iOS devices.
- Apr 2023Seed$2.9M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
What Tallinn researches in energy storage
- Tallinn University of Technology38
- Tallinn University of Applied Sciences1
- Tallinn University1
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.