Thin Line Capital

Thin Line Capital is a venture capital firm based in Pasadena, California. Founded in 2017, it specializes in seed stage investments, focusing on low-capital expenditure opportunities in energy, sustainability, agriculture, water, and related technology sectors.

Aaron Fyke

Founder and Managing Partner

15 past transactions

XGS Energy

Series A in 2024
XGS Energy develops innovative geothermal technology to generate competitively priced renewable energy worldwide. Its clean, green, and climate-friendly solution enables clients to harness geothermal heat and power from deep earth formations globally.

XGS Energy

Venture Round in 2024
XGS Energy develops innovative geothermal technology to generate competitively priced renewable energy worldwide. Its clean, green, and climate-friendly solution enables clients to harness geothermal heat and power from deep earth formations globally.

Optiwatt

Series A in 2023
Optiwatt is a software company that connects home electricity rate data with electric vehicle (EV) battery metrics. It securely integrates with EV apps, automatically finds users' utility costs based on their home address, and calculates the impact of charging on electric bills. Additionally, Optiwatt offers charge forecasting to alleviate range anxiety by accurately predicting savings from driving electric using real-time electricity rates and local gas prices.

Divirod

Convertible Note in 2023
Divirod develops a water data analytics platform and sensor network that provides real-time data and predictive insights on water, soil moisture, and vegetation. The platform leverages GPS satellite signals to measure water conditions with high precision and offers data via API and live visualizations. It helps organizations manage water resources, assess risks from floods and droughts, and support decisions in water management, farming, catastrophe planning, and infrastructure planning. By delivering timely, location-specific information, Divirod aims to conserve water resources, protect properties, and enhance resilience for clients across sectors.

Othersphere

Seed Round in 2023
Othersphere develops a SaaS platform that helps identify profitable and sustainable locations for deploying zero or low greenhouse gas industrial technologies. This enables companies to reduce their greenhouse gas emissions trajectories while gaining access to unique market insights.

SenseNet

Seed Round in 2023
SenseNet Inc. specializes in developing advanced Internet-of-Things (IoT) technology aimed at detecting wildfires early to safeguard communities and industries from their devastating impacts. The company offers an integrated IoT system that enhances data collection and analysis for large-scale applications, focusing on effective wildfire monitoring and protection. Utilizing a combination of low-power wide area networks and fifth-generation communications, SenseNet's solutions ensure seamless implementation in both remote and urban environments. This innovative approach provides users with timely insights and critical data necessary for preventing catastrophic wildfires, thereby protecting human lives and environmental resources.

Operant Networks

Seed Round in 2022
Operant Networks is a data-centric networking and cybersecurity technology provider that offers a cyber-secure, technology-agnostic platform to help clients deploy services and evolve faster. The company focuses on simplifying networking and cybersecurity for energy companies, delivering visibility and efficient management across non-human machines, including edge devices, workloads and agents, to reduce cyber risks while enabling secure and efficient operations. Headquartered in Rohnert Park, California.

Optiwatt

Seed Round in 2022
Optiwatt is a software company that connects home electricity rate data with electric vehicle (EV) battery metrics. It securely integrates with EV apps, automatically finds users' utility costs based on their home address, and calculates the impact of charging on electric bills. Additionally, Optiwatt offers charge forecasting to alleviate range anxiety by accurately predicting savings from driving electric using real-time electricity rates and local gas prices.

Sunairio

Seed Round in 2022
Sunairio is a developer of a climate intelligence platform focused on renewable energy prediction. The company's platform utilizes proprietary climate simulation technology to generate probabilistic forecasts for weather, energy, and market prices. By integrating correlations between multiple locations and various weather features, Sunairio's platform enhances the accuracy of its simulations. This advanced forecasting capability allows energy industry clients to make informed decisions regarding investments, planning, and operations, ultimately supporting the transition to renewable energy sources. Sunairio leverages comprehensive historical weather data from NOAA to improve its predictive models.

Kevala

Series A in 2021
Founded in 2014, Kevala is a data and analytics company specializing in delivering actionable insights for a robust, sustainable, and safe electric grid. It offers cloud-based software that enables users to find and value new locations for solar, storage, and other energy resources, while quantifying environmental impacts. Trusted by governments, utilities, and industry, Kevala's platform integrates deep subject matter expertise across the entire energy value chain.

Divirod

Venture Round in 2021
Divirod develops a water data analytics platform and sensor network that provides real-time data and predictive insights on water, soil moisture, and vegetation. The platform leverages GPS satellite signals to measure water conditions with high precision and offers data via API and live visualizations. It helps organizations manage water resources, assess risks from floods and droughts, and support decisions in water management, farming, catastrophe planning, and infrastructure planning. By delivering timely, location-specific information, Divirod aims to conserve water resources, protect properties, and enhance resilience for clients across sectors.

Solidspac3

Seed Round in 2020
Solidspac3 is a construction software and services company focused on continuous coordination in the field. It provides a cloud-based field construction platform that reduces cost, rework, and delays by comparing actual field conditions with two- or three-dimensional plans, identifying deviations, and generating analysis reports. The platform supports BIM data, point clouds, and project communications, enabling superintendents, foremen, and other field professionals to verify that work in the field aligns with plans and that stakeholders stay informed.

Sistine Solar

Venture Round in 2019
Sistine Solar, Inc. is a renewable energy company based in Somerville, Massachusetts, established in 2012. The company specializes in manufacturing SolarSkin, a product that camouflages solar panels to blend seamlessly with various roofing styles. Sistine Solar offers a range of customizable solar panel options, including architectural shingles, 3-tab shingles, concrete tiles, seamed metal roofs, and bespoke designs. By utilizing techniques from solar photovoltaics, color science, and cognitive sciences, Sistine Solar enables homeowners to personalize their solar installations, allowing for a harmonious integration of renewable energy solutions with the aesthetic preferences of their residences.

Voltaiq

Series A in 2018
Founded in 2012 by UC Berkeley PhDs, Voltaiq specializes in battery analytics software. Its Enterprise Battery Intelligenceâ„¢ platform optimizes battery performance, enhances safety, and improves financing for customers across transportation, consumer electronics, energy storage, and the full battery supply chain.

Trace AQ

Trace AQ is a technology company that specializes in air quality management. It uses an AI platform to provide real-time data, personalized forecasts, and alerts for wildfire smoke, regulatory risk, and environmental disruptions. This service enables schools and event organizers to proactively protect the health of attendees by managing air quality effectively.
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