Investors / Thin Line Capital
Thin Line Capital
Venture capital
Thin Line Capital is a venture capital firm that invests in seed-stage companies in energy and sustainability. It describes itself as founded by entrepreneurs who take an active, mentoring role in a concentrated portfolio of companies.
Invests inAI & Machine LearningIndustrial & Manufacturing
In its own wordsclimate techrenewable energyelectrificationenergy storagesustainabilitycarbon reduction
Your fit with Thin Line Capital
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsThin Line Capital lists 17 checked portfolio companies on its own site and is named in 2 funding rounds. Its most frequent entry is Pre-seed, 50% of the companies with a known first round. Its largest themes are AI & Machine Learning (28%), Industrial & Manufacturing (19%) and Education (13%). 86% of its companies are based in United States. It invests most often alongside Constellation Technology Ventures, Active Impact Investments and Anzu Partners.
Counts come from funding rounds that name Thin Line Capital, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not Thin Line Capital's whole history. Rounds on record name 2 companies; its own site lists 17. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 50% |
| Seed | 0% |
| Series A | 50% |
| Series B | 0% |
| Growth | 0% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 0 | 0 |
| '26 | 2 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 44th | 17 companies |
| Recent activity | 69th | 2 rounds in 12 months |
| Early stage | 73th | 50% of entries at pre-seed or seed |
| Evidence | 81th | 12% of companies confirmed by a round |
| Sector focus | 46th | 28% in its largest sector |
| Reach | 42th | 2 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 28% | 18% |
| Industrial & Manufacturing | 19% | 7% |
| Education | 13% | 7% |
| Real Estate & Construction | 9% | 3% |
| Cybersecurity | 6% | 4% |
| Healthcare & Biotech | 6% | 15% |
| Space & Defense | 3% | 3% |
| Enterprise Software | 3% | 8% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Constellation Technology Ventures | 4 |
| Active Impact Investments | 3 |
| Anzu Partners | 2 |
| Buoyant Ventures | 2 |
| Creative Destruction Lab | 2 |
| Energy Impact Partners | 2 |
| Techstars | 2 |
| VoLo Earth Ventures | 2 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers17100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Constellation Technology Ventures
Compare Thin Line Capital head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Thin Line Capital| Date | Company | Stage |
|---|---|---|
| 5 Nov 2026 | Pre-Seed | |
| 31 Aug 2026 | Series A |
Round details for Thin Line Capital
Amounts, full round histories and every co-investor in Thin Line Capital's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
17 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Audette helps asset and portfolio managers identify, prioritize, and plan value-accretive retrofits | Real Estate & ConstructionSpace & Defense | Portfolio page | ||
| Digital Harvest provides data infrastructure for agriculture | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Divirod combines the power of data and IoT to deliver trustworthy and actionable water data, nowcast, and forecasts for customers combatting water risk and data scarcity. | Industrial & ManufacturingEnterprise Software | Portfolio page | ||
| Kevala provides a cloud-based platform that leverages comprehensive energy data analytics to accelerate smart investments in electrical grid infrastructure. | EducationHealthcare & Biotech | Portfolio page | ||
| Mineral Forecast provides a geoscience-specific AI platform to help mining and resource teams make better decisions across the mining lifecycle. | AI & Machine LearningMobility & Logistics | Portfolio page | ||
| Neuron Industries develops and manufactures an AI-programmable industrial controller called Cortex AIC | Industrial & Manufacturing | Portfolio page | ||
| Operant Networks secures critical systems that run our world with its zero trust infrastructure for machines and AI. | CybersecurityAI & Machine Learning | Portfolio page | ||
| Optiwatt provides an energy management platform for utilities and grid operators | EducationE-commerce & Marketplaces | Portfolio page | ||
| Othersphere delivers comprehensive site viability assessments powered by a global diligence engine for infrastructure locations | Real Estate & ConstructionAI & Machine Learning | Portfolio page | ||
| Reframe Systems is a vertically integrated design-build partner for developers that handles everything from permits to occupancy using robotics, automation, and local microfactories to deliver high-performance housing | Real Estate & Construction | Aug 2026Series A | Page + round | |
| SenseNet provides wildfire risk resilience intelligence using AI smoke cameras, gas sensors, satellite integration, and instant alerts | AI & Machine LearningCybersecurity | Portfolio page | ||
| Sistine Solar customizes and protects solar panels with aesthetic overlay protectors. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Strive Robotics empowers manufacturing teams to deploy, teach, and reconfigure robots themselves as parts, machines, and workflows change. | Robotics & HardwareIndustrial & Manufacturing | Nov 2026Pre-Seed | Page + round | |
| Sunairio provides next-generation grid forecasting where weather, climate, and energy meet. | Climate & EnergyAI & Machine Learning | Portfolio page | ||
| Trace Air Quality provides air quality forecasting and alerts for healthcare and other applications | Healthcare & BiotechAI & Machine Learning | Portfolio page | ||
| Voltaiq provides an enterprise AI platform for battery engineering | AI & Machine LearningIndustrial & Manufacturing | Portfolio page | ||
| XGS Energy develops and deploys cutting-edge geothermal energy technologies | EducationIndustrial & Manufacturing | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- thinlinecapital.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 31 Aug 2026
- Companies checked
- 17
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
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