Top 10 Renewable Energy Startup Investors in Estonia in May 2026

Portfolio highlights

• Esgrid — Esgrid provides value-chain sustainability management solutions to medium-sized businesses and financial institutions.
• Ligence — AI Automated Echocardiography - Artificial intelligence-powered automated heart ultrasound echo lab system.
• Soldera — Soldera enables renewable energy producers to earn additional income through an automatic guarantee of the origin trading system.

Portfolio highlights

• Acembee — Acembee is an AI-driven platform designed to automate the tracking, data collection, and reporting of LCA A4+A5 (Life Cycle Assessment phases related to construction site energy use and transport) for construction projects. provides solution that consolidates data from the building site into one platform, enabling precise, real-time insights intoenergy consumption, CO₂ emissions, and compliance with legal environmental requirements. Acembee saves significant time, reduces unnecessary energy use by up to 40%, and helps projects stay within allowed CO₂ limits, ultimately making sustainability management on construction sites.
• Kvist Solutions — Kvist Solutions tilbyr programvare som forenkler BREEAM sertifisering. Vi gir deg oversikt over hele prosjektet, slik at veien til sertifisering blir oversiktlig og forutsigbar.
• Jälle Technologies — Jälle Technologies create advanced recycling technologies that transform battery waste into high-value resources.

Portfolio highlights

• KWOTA — Kwota offers digital validation and trading services for recycled material CO₂ emissions.
• Spacedrip — Spacedrip develops automated water treatment and reuse systems that recycle wastewater back to pure usable water with minimal maintenance. Our systems provide off-grid water without the need for centralized sewage/water solutions.
• RAIKU — RAIKU is a cleantech startup that produces 100% natural packaging material that has also great looks and shock absorption - most importantly, it gives 15-20 times more volume to its raw material making it one of the most resource efficient material uses in the world with high margins. Both the production is and products are clean making no harm tonature. RAIKU has raised over 1.2mln€ in the pre-seed stage, built a team of over 10 people, its own IP and clients are already using its packaging material. This material will up-end the 1 trillion € packaging sector.

Portfolio highlights

• KWOTA — Kwota offers digital validation and trading services for recycled material CO₂ emissions.
• PayQin — Vous allez aimer payer en ligne
• Detail — Record and edit videos with Detail for iOS and macOS. Everything you need to create videos and podcasts, fast. Download for free on the App Store.

Portfolio highlights

• KWOTA — Kwota offers digital validation and trading services for recycled material CO₂ emissions.

Portfolio highlights

• NobodyWho — NobodyWho is an inference engine that lets you run LLMs locally on any device
• FION Energy — FION Energy GmbH is a Berlin-based company at the forefront of the clean energy transition, specializing in advanced energy storage and management solutions for industrial businesses. Their technology helps companies optimize energy use, reduce costs, enhance grid stability, and accelerate decarbonization by providing economically viable storagesystems tailored to each customer's needs. FION supports grid operators by enabling efficient orchestration of energy consumption and generation, contributing to a more stable and sustainable energy future. They offer personalized consulting, rapid installation, and continuous optimization of energy storage performance to maximize cost savings and flexibility.
• Atmospheric AI — Transforming supply chains through radical transparency, starting with petrochemicals.

Portfolio highlights

• FanSifter — FanSifter is a fan data management platform that leverages machine learning to help rights holders in music, entertainment, and sports increase tickets, music, merch, experiences, and sponsorships sales.
• Jälle Technologies — Jälle Technologies create advanced recycling technologies that transform battery waste into high-value resources.

Portfolio highlights

• Relcu — Relcu combines agentic AI with an all-in-one mortgage and deposit platform. From lead intelligence to funding, it drives smarter decisions and faster closings.
• Reachify — Reachify empowers restaurants to connect with their customers easily with Call Deflection to capture otherwise lost revenue.
• Rulebase — Rulebase create AI agents to safeguard fintechs and banks from fraud, automating investigations and preventing voice fraud.

Portfolio highlights

• Bioreactor — Bioreactor is a revolutionary technology that converts bio waste into clean energy through biomass gasification. It's a sustainable, efficient and cost-effective solution that addresses energy poverty, energy security and climate change. With the use of the latest technology in computational fluid dynamics, cloud-optimized digital twin anddeep learning algorithms, the Bioreactor can optimize its performance in real-time over a wide range of fuels and operating conditions. The Bioreactor is a game changer in the energy industry, it can reduce greenhouse gas emissions, drastically lower energy costs, and help to alleviate energy poverty on a national scale.
• Safegrid — Smarter sensors for a smarter grid
• Vensum Power — Revolutionizing power conversion. More power in same package, less energy waste and low maintenance.

Portfolio highlights

• FanSifter — FanSifter is a fan data management platform that leverages machine learning to help rights holders in music, entertainment, and sports increase tickets, music, merch, experiences, and sponsorships sales.
• Giraffe360 — Giraffe360 is game-changing subscription product for real estate companies to streamline professional quality photography and high accuracy floor plan creation.
• RecruitLab — Teamdash's built-in recruitment, applicant tracking, and marketing features give you the focus you need to achieve the impossible. Here's how.