Propeller VC

Banyu Carbon aims to radically reduce the cost of carbon capture by providing low-cost and easily verified carbon credits to companies and governments with ambitious climate goals. Their innovative process utilizes sunlight to drive a chemical reaction that releases CO2 from seawater, contributing to the transition to a net-zero carbon economy.

Blue Energy de-risks nuclear construction through fixed-price contracting at fab yards and shipyards, enabling project finance.

CarbonRun is dedicated to restoring river health and combating climate change through innovative carbon dioxide removal (CDR) practices. By deacidifying rivers and enhancing their alkalinity, CarbonRun aims to improve water quality, boost biodiversity, and draw down significant amounts of carbon dioxide from the atmosphere.

Circle Seafoods is reshaping the wild seafood industry by increasing the value of wild fish through efficient, profitable, and equitable processes, ensuring higher prices for fishermen and better quality seafood for consumers.

Ebb is pioneering electrochemical water technology that tackles two of the world's most urgent problems: growing demand for freshwater and excess carbon dioxide in the atmosphere. We partner with desalination plants to transform brine—the salty waste stream left behind after freshwater is extracted—into additional freshwater, permanent carbon removal, and valuable industrial products.

Fleet Robotics is driving deep data insights for shipping, powered by submersible, autonomous hull-cleaning and inspection robots.

Navier is focused on creating innovative watercraft, particularly the N30, which is designed to revolutionize boating with advanced technology and sustainable practices.

Canada's largest dedicated climate-tech seed fund with over $180M–$200M AUM. Operates a capital + talent model with shared talent hub for portfolio companies. Only backs business models where revenue growth is directly tied to climate outcomes and tracks tonnes of CO₂e mitigated as their north star metric. Founded by Mike Winterfield, formerly President of Randstad Professionals managing $300M in revenue.

Leads deep-tech, hardware-heavy climate investments across cutting emissions, carbon removal, and time-buying solutions, backing nonprofit research and offering in-house scientific expertise plus hands-on technical, hiring, and regulatory support.

Invests at pre-seed and seed in deep-tech climate hardware (water, built environment, alternative materials), offering a large government/academic domain team plus GPs who commercialize physics-heavy products. Fills a gap in pre-seed and seed funding for deep-tech climate hardware startups, focusing on overlooked but system-critical areas like water, built environment, and alternative materials rather than mainstream renewable energy sectors.

Prelude Ventures manages capital exclusively for the climate-focused Simons family, creating a single-LP structure that demands strict venture returns from a 100% climate portfolio while applying a hard "no fossil fuels" rule that rejects any technology making oil, gas, or coal extraction cheaper or longer-lived. The firm combines deep technical operating experience with climate activism roots and has invested continuously through climate tech's "dark years" since 2009, positioning itself as a climate generalist comfortable with high capital intensity and long hardware timelines across the entire low-carbon economy.

Early-stage climate investor allocating 80% to hardware, using playbooks and Seedstrapping with $250k–$1m, AI efficiency, and alternative financing to reach $1M ARR or $10M pre-orders in 6 months. Concentrates on hardware-enabled solutions while most VCs avoid hardware, building specialized playbooks for funding physical systems and pioneering climate resilience beyond just carbon reduction.