Propeller

Propeller is a Boston-based venture capital firm founded in 2022 that focuses on climate technology. The firm invests in and develops companies that operate within the ocean and environmental sectors, aiming to address the challenges posed by climate change. As a Registered Investment Adviser, Propeller seeks to support innovative solutions that promote sustainability and resilience in marine ecosystems. Through its investments, the firm is dedicated to fostering growth in ocean-climate companies that contribute positively to the environment.

5 past transactions

Orpheus Ocean

Pre Seed Round in 2025
Orpheus Ocean is dedicated to deep ocean exploration through scalable, autonomous robots. Their mission is to make the ocean's depths accessible for research, conservation, and resource management. They provide flexible and cost-effective solutions for deep ocean intelligence, utilizing technology to explore the most extreme areas on Earth.

Vema Hydrogen

Seed Round in 2025
Vema Hydrogen is a pioneering clean hydrogen production company. It helps to fight the enormous decarbonization issue.

OTO

Series A in 2024
OTO is an All-in-one Shipping Management Software for Online Businesses & OmniChannel Brands to Ship, Manage, Track, Return & Analyze their online orders with 200+ Shipping Carriers from 1 consolidated dashboard. OTO's SaaS solution helps businesses to automate and streamline all their shipping operations through combined 6 systems including: Order Management System (OMS), Warehouse Management System (WMS), Last-Mile Management System (LMS), Drivers Management System (DMS), Returns Management System (RMS) & Customer Notification System (CNS). On the other hand, their Aggregator solution helps the the small and medium businesses (SMBs) selling online or offline to buy local and international shipping labels directly from OTO with no contracts needed with the shipping carriers with the best rates available in the market. OTO's solutions were designed to help their clients ship faster, cheaper and better, but saving them thousands of hours and millions in operational costs.

Allium Engineering

Seed Round in 2024
Allium Engineering is a civil engineering company specializing in the development and manufacturing of corrosion-resistant steel rebar. The company focuses on creating innovative coating methods for steel reinforcement, addressing the significant issue of concrete infrastructure degradation. By producing rebar that does not rust, Allium Engineering enables clients to construct durable infrastructure while contributing to the reduction of carbon emissions.

Rewind

Seed Round in 2023
Operator of a facility intended to capture carbon dioxide in agricultural waste on the bottom of the black sea. The company aim's to leave a world of abundance and climate stability for future generations by storing organic carbon in anoxic water where plants decompose extremely slowly to restore the earth's carbon balance, enabling clients effective store carbon for a much longer period.
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