Fundraising FoxPasadena · Seed · 4 people tracked
Also known as THIN LINE CAPITAL, LLC
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Investment thesis
Thin Line Capital views decarbonizing the global economy as a generational economic opportunity. It targets seed-stage, low-capex companies in renewable energy, electrification of transport, and climate resiliency, plus software and data tools that decarbonize the built environment. The firm writes roughly $400K-$600K checks and builds a concentrated portfolio in areas where its team has deep domain expertise. As former entrepreneurs and engineers, the partners act as hands-on advisors and mentors, aiming to be a founder's first and last resource. It is now deploying its second fund to back clean energy and climate-focused companies.
Source: firm website, verified Sep 29, 2026.
Team · 4 people
from the firm's website
What they invest in
from 15 of 18 portfolio companiesCleantech ×10AI & Machine Learning ×8Energy ×8Climate Tech ×5Data & Infrastructure ×5SaaS ×4AgTech ×2Deep Tech ×2
HQs:United States×10Chile×1
Who they back
founder profiles across 8 portfolio companiesFounding team size:solo founder×52 founders×23 founders×1
Accelerator rootsportfolio companies that came through a program
Investments · 18 tracked
founders shown can be your intro pathBy year:2025 · 12024 · 12023 · 22022 · 12021 · 12020 · 12019 · 18 dated
Divirod provides real-time global water data by combining IoT sensing with analytics to deliver monitoring, nowcasts, forecasts, and early flood warnings.
CleantechClimate TechData & InfrastructureIoTBoulder, US
Antonio Javier Marti Canales(Executive Officer, Director, Promoter)Javier Marti(Founder and Manager)inHeiko Udluft(Executive Officer)inRichard Brennan(Executive Officer)
BoardNicolas Sauvage(Director)in
Board seatAaron Fyke· per SEC Form D
Co-investorsPortfoliaTDK VenturesGoHub Ventures
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Audette provides a platform for asset and portfolio managers to identify and prioritize building retrofit investments, using data analysis to uncover high-return opportunities that improve net operating income and reduce emissions.
PropTechSaaS
Co-investorsBuoyant Ventures Management, LlcCreative Destruction Lab (CDL)Energy Impact PartnersForesight CanadaModerne VenturesPanache Ventures+2 more
Digital Harvest builds data integration and analytics systems for agriculture, combining field, operational, and satellite/sensor data into one platform for planning and performance analysis.
AgTechAI & Machine LearningData & Infrastructure
Kevala operates a cloud-based platform that uses energy data analytics to model the electrical grid, forecast electrification impacts, and support siting of solar and storage projects.
CleantechData & InfrastructureEnergySan Francisco, US
ARAM SHUMAVON(CEO, Founder)in
BoardMARK FERRON(Director)
Co-investorsC5 CapitalConstellation Technology VenturesHigh AlphaCercano ManagementCostanoa VenturesPSL Ventures
Mineral Forecast develops an AI platform for mining exploration that analyzes geoscience data to help identify promising mineral claims and optimize drilling operations.
AgTechAI & Machine LearningClimate TechDeep TechSantiago, CL
Javier Muñoz González(Founder)inJavier Muñoz(CEO & Co-Founder)inArturo Rochefort(COO & Co-Founder)in
Co-investorsMGV.VCSpider CapitalTechstars
Operant provides security and governance controls for agentic AI systems and Model Context Protocol workflows, enforcing per-action authorization, privacy controls, and audit-ready evidence at the network layer for regulated enterprises.
AI & Machine LearningCybersecurityEnterprise SoftwareRohnert Park, US
Shounok Sinha(Director)David Bass(Executive Officer, Director)Keith Rose(Executive Officer, Director)Rod Sugiyama(Executive Officer)Randall King(Executive Officer, Director)Robert MacDonald(Executive Officer)
Co-investorsConstellation Technology VenturesMSIVMarin Sonoma Impact Ventures
Neuron Industries builds Cortex, an AI-native industrial controller that replaces the traditional PLC, HMI, historian, and vendor IDE in a single device, letting controls engineers describe machine behavior in plain English and generate auditable real-time Python code.
Advanced ManufacturingAI & Machine LearningHardwareRoboticsLos Angeles, US
Dennis Ren(CEO)inKenneth Rhee(CTO)in
Co-investorsLyra Capital Pty LtdY CombinatorBlast.ClubFounders FactoryFundersClubObvious Ventures+1 more
Optiwatt provides a load-management and virtual power plant platform for utilities, grid operators, and co-ops in North America, combining a consumer web/mobile app with operator tools and an optimization engine that dispatches distributed energy resources like EVs, chargers, and thermostats.
CleantechEnergySaaS
Co-investorsEast 11 VenturesNavitas CapitalSkyview Ventures
Optiwatt provides a load management platform for utilities and grid operators to run virtual power plant and demand response programs by dispatching EVs, smart thermostats, and Level 2 chargers.
CleantechEnergySaaSSan Francisco, US
Casey Donahue(Executive Officer, Director)in
BoardLouis Schotsky(Director)inPeter Franklin(Director)
Co-investorsGV (Google Ventures)Urban InnovationActive Impact InvestmentsNavitas CapitalSkyview Ventures
Othersphere provides location analysis and optimization software for deploying energy-intensive infrastructure, helping teams identify ideal sites faster and with greater confidence.
AI & Machine LearningCleantechData & InfrastructureEnergy
Robert Murphy(CEO)inMatt Hammond(CPO)in
Co-investorsForesight CanadaKeiki CapitalActive Impact InvestmentsKDX
Sistine Solar develops SolarSkin, a customizable overlay for solar panels that lets the panels match a roof's aesthetic or display custom designs.
CleantechEnergyHardwareSomerville, US
Senthil Balasubramanian(Executive Officer, Director)Lisa Khanna(Director)Tom Dinwoodie(Director)
Co-investorsEnergy Foundry
Sunairio develops grid forecasting software that integrates energy, weather, and climate data to help energy traders, grid operators, and renewable asset developers optimize commercial decisions.
AI & Machine LearningCleantechClimate TechData & InfrastructureEnergyInsurTechBaltimore, US
Rob Cirincione(Founder & CEO)inMitchell Walk(Director)
BoardAlex Behar(Director)inDavid Arcara(Director)
Co-investorsBuoyant Ventures Management, LlcConstellation Technology VenturesKeiki CapitalMassMutual VenturesMVPRosecliff Ventures+1 more
Traceaq focuses on understanding, monitoring, and managing air quality through technology and science.
AI & Machine LearningCleantechClimate TechDeep TechIoT
Victor Gill(Chief Executive Officer)Taylor "Kai" Wilmot(Chief Technology Officer)inHeather Holmes(Co-Chief Science Officer)Derek Mallia(Co-Chief Science Officer)in
Co-investorsRusheen Capital Partners
Voltaiq offers an AI-powered SaaS platform for the battery industry that collects and harmonizes data across the battery lifecycle, automates anomaly and quality detection, and provides root-cause analysis and natural-language data querying.
AI & Machine LearningCleantechEnergyEnterprise SoftwareSaaSBrooklyn, US
Tal Sholklapper(Co-founder & CEO)inEli Leland(Co-founder & CTO)in
BoardMichael Berolzheimer(Director)in
Co-investorsAnzu PartnersBee PartnersConductor CapitalSJF Ventures
XGS Energy develops a proprietary solid-state, closed-loop geothermal system that uses thermally conductive materials and a pipe-in-pipe heat exchanger to generate clean, round-the-clock power without dependence on water or specific rock geology.
CleantechClimate TechEnergyPalo Alto, US
Richard Chong(Chief Financial Officer)inMichael Danaher(Executive Officer)Ghazal Izadi(Executive Officer)inJoshua Prueher(Executive Officer, Director)Glen Robinson(Director)David Seldin(Director)
Co-investorsAligned Climate CapitalAnzu PartnersClearSkyClimate Innovation CapitalConstellation Technology VenturesValo Ventures+2 more
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Digital HarvestSensenetSolidspac3
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.
Frequently asked questions
- How many investments has Thin Line Capital made?
- Thin Line Capital has 18 tracked investments, including 1 dated in the last 24 months.
- What stage does Thin Line Capital invest at?
- Thin Line Capital invests at the Seed stage.
- What is Thin Line Capital's typical check size?
- Thin Line Capital typically writes checks of $400K – $600K.
- What sectors does Thin Line Capital focus on?
- Thin Line Capital focuses on Cleantech, Climate Tech, Energy, IoT, Mobility & Transportation.
- Where is Thin Line Capital located?
- Thin Line Capital is headquartered in Pasadena, US.
- Does Thin Line Capital lead rounds?
- Thin Line Capital typically participates in rounds rather than leading them.
- Who does Thin Line Capital co-invest with?
- Thin Line Capital most often shares deals with Constellation Technology Ventures, Anzu Partners, Buoyant Ventures Management, Llc, among 35 tracked co-investors.
Media · Podcasts & interviews
featuring the teamAaron Fyke — Thin Line Capital
LA Venture Podcast · Aaron Fyke
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