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Quiet Capital Portfolio Companies

Investor actively backing innovative startups and growth-stage companies across various industries and funding rounds.

Last updated: June 2026

Quiet Capital Investment Overview

Portfolio Companies
208
Total Invested
$3.8B
Average Investment
$22.5M

Quiet Capital's Most Recent Investments (2020+)

Company NameFoundedFunding StageAmountCity
Momentus2026Post Ipo Equity$5.0MSanta Clara
Substack2026Secondary MarketUndisclosedSan Francisco
Last Energy2025Series C$100.0MWashington
Kilo Code2025Seed$8.0MSan Francisco
Topsort2025Series UnknownUndisclosedPalo Alto
Doppel2025Series C$70.0MCovina
OnRamp2025Series A$15.0MBoston
Aerolensec2025Seed$4.2MBellevue
Amae Health2025Series B$25.0MSan Francisco
DragonflyDB2025Non Equity AssistanceUndisclosedTel Aviv

Complete List of Quiet Capital Portfolio Companies (208)

Export
#CompanyStageAmountLocation
76MomentusPost Ipo Equity$5.0MSanta Clara, United States
77SubstackSecondary MarketUndisclosedSan Francisco, United States
78Last EnergySeries C$100.0MWashington, United States
79Kilo CodeSeed$8.0MSan Francisco, United States
80TopsortSeries UnknownUndisclosedPalo Alto, United States
81DoppelSeries C$70.0MCovina, United States
82OnRampSeries A$15.0MBoston, United States
83AerolensecSeed$4.2MBellevue, United States
84Amae HealthSeries B$25.0MSan Francisco, United States
85DragonflyDBNon Equity AssistanceUndisclosedTel Aviv, Israel
AerospaceSpace TravelTransportation

Momentus is a commercial space company providing satellite buses, in-space transportation, hosted payloads, and in-orbit services.

Santa Clara, United States
January 2026
$5.0M
Post Ipo Equity

Founder Contacts

19,000+ verified contacts

Content CreatorsMedia and EntertainmentNewsPublishingSubscription Service

Substack is a subscription-based newsletter publishing platform for independent writers.

San Francisco, United States
January 2026
Secondary Market

Founder Contacts

19,000+ verified contacts

Clean EnergyEnergyEnergy ManagementNuclearRenewable EnergySustainability

Last Energy is a nuclear technology company that provides nuclear energy through its modular micro nuclear power plants.

Washington, United States
December 2025
$100.0M
Series C

Founder Contacts

19,000+ verified contacts

Artificial Intelligence (AI)Information TechnologyOpen SourceSoftware

Kilo Code provides an open-source AI-powered coding assistant that supports code generation, debugging, and documentation.

San Francisco, United States
December 2025
$8.0M
Seed

Founder Contacts

19,000+ verified contacts

Ad ExchangeAdvertising PlatformsArtificial Intelligence (AI)E-Commerce PlatformsMarketplaceRetail Technology

Topsort provides AI-powered auction tools and infrastructure APIs to help brands build ad businesses without cookies or user tracking.

Palo Alto, United States
November 2025
Series Unknown

Founder Contacts

19,000+ verified contacts

Artificial Intelligence (AI)Cyber SecurityRisk Management

Doppel is an AI-native security platform that helps organizations defend against social engineering risks and digital impersonation.

Covina, United States
November 2025
$70.0M
Series C

Founder Contacts

19,000+ verified contacts

B2BEnterprise SoftwareSaaSSoftware

OnRamp is customer onboarding software that helps businesses accelerate time-to-value with guided workflows and automation.

Boston, United States
November 2025
$15.0M
Series A

Founder Contacts

19,000+ verified contacts

AI safety layer for airside operations.

Bellevue, United States
November 2025
$4.2M
Seed

Founder Contacts

19,000+ verified contacts

Health CareMedicalMental HealthPersonal Health

Amae Health specializes in integrated outpatient care for individuals with severe mental illness.

San Francisco, United States
November 2025
$25.0M
Series B

Founder Contacts

19,000+ verified contacts

Software

DragonflyDB is the fastest memory store in the universe.

Tel Aviv, Israel
October 2025
Non Equity Assistance

Founder Contacts

19,000+ verified contacts

Consumer GoodsDeliveryE-CommerceFood and BeverageFood DeliveryMobile Apps

Rappi is an on-demand delivery platform that connects users with local businesses and couriers to deliver a wide range of products.

Bogotá, Colombia
October 2025
Debt Financing

Founder Contacts

19,000+ verified contacts

ChemicalIndustrial AutomationIndustrial ManufacturingManufacturingOil and GasPharmaceuticalPredictive AnalyticsSoftware

Basetwo is an AI CoPilot for manufacturing that provides engineers with recommendations on how to optimize yield, quality, and costs.

Toronto, Canada
October 2025
$1.0M
Non Equity Assistance

Founder Contacts

19,000+ verified contacts

Artificial Intelligence (AI)Information TechnologyProductivity ToolsSoftware

Luzid is a Software Development firm offering AI based developer's automation tools for enterprise implementation processes.

San Francisco, United States
September 2025
$2.8M
Pre-Seed

Founder Contacts

19,000+ verified contacts

AI InfrastructureCloud Data ServicesInformation TechnologySoftwareWeb Development

Modal develops machine learning software to help run code in the cloud.

New York, United States
September 2025
$87.0M
Series B

Founder Contacts

19,000+ verified contacts

CreditCredit CardsFinanceFinTechLendingPersonal Finance

Tilt (formerly Empower) is a financial technology company on a mission to expand access to fair credit.

San Francisco, United States
September 2025
Undisclosed

Founder Contacts

19,000+ verified contacts

FinanceFinancial ServicesHedge FundsVenture Capital

Arch digitally manages private investment operations for investors and investment advisors.

New York, United States
September 2025
$52.0M
Series B

Founder Contacts

19,000+ verified contacts

AgTechArtificial Intelligence (AI)FarmingRobotics

Orchard Robotics develops an operating system that enables precision agriculture driven by robots and AI.

Seattle, United States
September 2025
$22.0M
Series A

Founder Contacts

19,000+ verified contacts

E-CommerceInternetRetail

FirstClub aims to become a speedy commerce-first omnichannel retailer that promotes product quality through offline experience stores.

Bengaluru, India
September 2025
$23.0M
Series A

Founder Contacts

19,000+ verified contacts

Clean EnergyElectrical DistributionEnergyEnvironmental EngineeringRenewable Energy

Commonwealth Fusion Systems designs and develops commercial fusion energy systems to produce clean energy.

Cambridge, United States
August 2025
$863.0M
Series B

Founder Contacts

19,000+ verified contacts

FinanceFinancial ServicesFinTech

Cache is a fintech startup that offers brokerage service for individuals holding large stock positions.

San Francisco, United States
August 2025
$12.5M
Series A

Founder Contacts

19,000+ verified contacts

FitnessWellness

ShareWell is a peer assistance platform that allows users to participate in small group video sessions.

San Francisco, United States
July 2025
Seed

Founder Contacts

19,000+ verified contacts

Artificial Intelligence (AI)HardwarePublic SafetySoftware

Pano uses deep learning AI and computer vision to automatically detect, verify and classify wildfire events in real time.

San Francisco, United States
June 2025
$44.0M
Series B

Founder Contacts

19,000+ verified contacts

Marine TechnologyRoboticsService IndustrySoftware

Bedrock Ocean Exploration is a platform for underwater vehicles.

Brooklyn, United States
June 2025
$25.0M
Series A

Founder Contacts

19,000+ verified contacts

Artificial Intelligence (AI)Information TechnologyMachine LearningQuality AssuranceSoftware

Openlayer is an analysis platform that "opens up" machine learning models by detecting and eliminating failure patterns and biases.

San Francisco, United States
May 2025
$14.5M
Series A

Founder Contacts

19,000+ verified contacts

AppsConsumer ApplicationsHome Services

OSCAR is a home services app that offers a platform for booking various on-demand home services for customers.

Lisbon, Portugal
May 2025
$6.8M
Seed

Founder Contacts

19,000+ verified contacts

Showing 76-100 of 208 portfolio companies

Frequently Asked Questions About Quiet Capital

How many companies has Quiet Capital invested in?

Quiet Capital has invested in 208 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does Quiet Capital invest in?

Quiet Capital's top investment sectors include Software, Artificial Intelligence (AI), Information Technology, Finance, Clean Energy. The firm invests across 76 different industry categories.

What is Quiet Capital's largest investment?

Among tracked funding rounds, Commonwealth Fusion Systems received $863.0M in a Series B round. Quiet Capital's total known invested capital is $3.8B.

What is the average investment size for Quiet Capital?

Quiet Capital's average investment size is $22.5M across its portfolio of 208 companies.

What are Quiet Capital's most recent investments?

Recent Quiet Capital portfolio additions include Momentus, Substack, Last Energy, Kilo Code, Topsort. These companies were founded in 2020 or later.

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