S3 Ventures
Actively deployingAustin · Seed–Series B · 11 people tracked
Investment thesis
S3 Ventures targets technology companies addressing significant business challenges across software, infrastructure, developer tools, hardware, and tech-driven services, as well as healthcare companies developing medical innovations from diagnostics to wellness solutions. The firm's single philanthropic limited partner structure provides flexibility and patient capital to support entrepreneurs building transformative, high-impact companies without the constraints of traditional venture models.
Source: firm website, verified Jul 20, 2026.
Team · 11 people
from the firm's websiteWhat they invest in
from 8 of 101 portfolio companiesAI & Machine Learning ×5Enterprise Software ×4SaaS ×4Cloud Computing ×2Fintech ×2GovTech ×2Cleantech ×1Construction Tech ×1
HQs:United States×17
Investments · showing 60 of 101
founders shown can be your intro pathArpio provides an automated disaster recovery platform purpose-built for AWS and Azure cloud applications. The platform orchestrates fast failover and recovery from outages, cyberattacks, and other cloud disasters without requiring scripts or runbooks.
Cloud ComputingCybersecurityData & InfrastructureEnterprise SoftwareSaaSDurham, US
Buildforce is a platform that matches electrical contractors with vetted, short-term and temp-to-hire electricians while managing worker onboarding, time tracking, and compliance. The platform serves electrical contractors and helps them efficiently staff projects through pre-vetted worker credentials, attendance tracking, and payroll management.
Construction TechHR TechSaaS
Plural is an AI-powered platform that helps enterprises and organizations analyze legislation and anticipate policy impacts through bill summarization, topic detection, advanced search, and tracking across state and federal jurisdictions.
AI & Machine LearningGovTechLegalTechMounds View, US
A construction-native dynamic discounting marketplace that converts general contractor balance-sheet capital into yield while providing subcontractors with debt-free early payments.
Kamiwaza is a secure AI orchestration platform that enables AI operations across distributed environments in regulated industries and government without moving data or weakening security controls. It provides real-time processing, document automation, and unified data access while maintaining security and audit compliance.
AI & Machine LearningEnterprise SoftwareGovTech
Board seats · per SEC filings · 12
what is this? ⓘ$17.6M raise · filed Jun 2026 · via Charlie Plauche
$7.9M raise · filed Mar 2026 · via Charlie Plauche
$8.8M raise · filed Jan 2026 · via Charlie Plauche
$13.2M raise · filed Jan 2026 · via Eric A. Engineer
$13M raise · filed Apr 2025 · via Eric Engineer
$8.5M raise · filed Jan 2025 · via Eric Matthew Engineer
$25.5M raise · filed Nov 2024 · via Charlie F. Plauche
$42.5M raise · filed Sep 2024 · via Charlie Plauche
$18.4M raise · filed Jan 2024 · via Charlie Plauche
$105M raise · filed Feb 2023 · via Charlie Plauche
$3M raise · filed Nov 2022 · via Brian R. Smith, Eric H. Engineer
$140M raise · filed Oct 2020 · via Brian R. Smith, Charlie R. Plauche
Inferred from directors named on each company's SEC Form D — public regulatory data, not a portfolio list published by the firm.
Frequently asked questions
- What stage does S3 Ventures invest at?
- S3 Ventures invests at the Seed, Series A, Series B stages.
- What is S3 Ventures's typical check size?
- S3 Ventures typically writes checks of $500K – $15M.
- What sectors does S3 Ventures focus on?
- S3 Ventures focuses on Construction Tech, Developer Tools, Digital Health, Enterprise Software, Hardware, Medical Devices.
- Where is S3 Ventures located?
- S3 Ventures is headquartered in Austin, US.
- Does S3 Ventures lead rounds?
- Yes, S3 Ventures leads investment rounds.
Similar investors
Data Collective identifies and supports ambitious company founders developing technology-driven solutions. The firm focuses on companies using innovation to restore predictability in an unstable world, with demonstrated expertise across clean energy, gene therapy, sustainable agriculture, and machine learning applications in healthcare.
Alumni Ventures is one of the most active venture firms in the U.S., providing individual and institutional investors with access to professional-grade venture capital opportunities across diverse stages, sectors, and geographies. The firm manages $1.6B+ in committed capital and leverages its network of 850,000+ community members to source deals and support portfolio companies.
Google Ventures invests in innovative founders across diverse industries, focusing on companies where they can provide value across multiple stages and milestones through long-term relationships.
Karma invests in deep tech companies in Europe, backing 26 portfolio companies with initial cheques of €1-5M and managing €170M in assets.
Khosla Ventures is a venture capital firm investing across consumer and retail, enterprise, fintech, frontier technologies, sustainability, digital health, medtech and diagnostics, and therapeutics sectors.