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S3 Ventures — Portfolio

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

87
Companies
$1.2B
Total invested
$16.0M
Avg. check
61
Industries
Software 8Health Care 6Medical Device 5Financial Services 5Artificial Intelligence (AI) 5SaaS 5+55 more
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Portfolio companies

Showing 1–24 of 87
Stellar
September 2021

Stellar maintains, repairs, and improves its clients' real estate properties.

Building Maintenance · Dallas$20.0M Series B
Interplay Learning
September 2024

Interplay Learning is an information technology company that specializes in virtual reality and 3D solutions.

Education · Austin$20.0M Private Equity
Spectrawave
September 2024

Spectrawave is a medical device company that develops optical diagnostic and therapeutic devices.

Biotechnology · Waltham$50.0M Series B
ZSuite Technologies
August 2022

ZSuite Technologies provides financial institutions with innovative technology that solves real problems and grow businesses.

Banking · Burlington$11.0M Series A
Nestimate
August 2025

Nestimate is an analytics platform that provides retirement income services.

Financial Services · Lincoln$3.0M Seed
ControlRooms.ai
August 2023

AI-Assisted Troubleshooting for Heavy Industry

Artificial Intelligence (AI) · Austin$10.0M Series A
Cloverleaf AI
August 2026

Cloverleaf AI is a SaaS solution that provides vendors with early insights into RFPs through analysis of government meetings.

Artificial Intelligence (AI) · Denver$8.0M Series A
MaxQ Medical
August 2026

MaxQ Medical is a medical device manufacturing company that provides prostate care with all-in-one imaging and targeted HIFU therapy system.

Health Care · Sunnyvale$20.0M Series A
Boom
August 2026

Boom provides financial solutions to produce credit and rent payments.

Financial Services · New York$15.0M Series A
Vendelux
July 2026

Vendelux is a developer of AI-powered event intelligence platform optimizing B2B marketing, meetings, and event ROI.

Artificial Intelligence (AI) · New York$50.0M Series B
DataBahn
July 2026

DataBahn is an AI-powered data pipeline management tool that automates and enriches telemetry data with AI-enabled precision.

Artificial Intelligence (AI) · Dallas$40.0M Series B
Buildforce
July 2026

Buildforce is a marketplace and career lifecycle platform for people in the construction trades

Construction · Houston$10.0M Series A
Saranas
July 2021

Saranas develops a medical device that detects internal bleeding during catheterization procedures.

Health Care · Houston$12.8M Series B
RapidPulse
July 2026

RapidPulse is a privately held medical device company that develops minimally invasive vascular products for ischemic stroke

Health Care · Miami$48.0M Series B
Sumatra
July 2022

Sumatra helps in making decision by automating ideas to reality, from its performance data-enrichment platform and end-to-end services.

Consulting · Austin$1.5M Seed
Videate
July 2025

From Script to Screen with No In Between.

Artificial Intelligence (AI) · AustinConvertible Note
Earlytrade
June 2026

Earlytrade creates a positive change in the way businesses.

Financial Services · Sydney$10.0M Series A
Arpio
June 2026

Arpio protects and eliminates downtime for AWS applications by making it easy to recover from any outage in just a few minutes.

B2B · Durham$8.2M Series A
Advanced NanoTherapies
June 2026

Advanced NanoTherapies researcehes biodegradable functionalized nanoparticle technology.

Health Care · Los Gatos$31.0M Series B
UpEquity
June 2025

UpEquity is a tech-enabled mortgage platform.

Financial Services · Austin$200.0M Debt Financing
Atmosphere
May 2025

Atmosphere is a streaming TV platform for businesses, offering 21 original and partner TV channels.

Media and Entertainment · Austin$62.7M Debt Financing
Sudozi
May 2022

Sudozi is a real-time platform that track, collaborate, budget, and approve budget management and vendor management workflow.

Accounting · Austin$4.3M Seed
Civic Eagle
May 2022

Civic Eagle develops software that helps companies discover and analyze legislation and regulations with no manual work.

B2B · Minneapolis$10.0M Series A
BrainCheck
February 2026

BrainCheck is a digital platform for cognitive assessment and care that evaluates brain health across clinical and non-clinical settings.

Health Care · Houston$13.0M Series A

Where S3 Ventures invests

Software8
Health Care6
Medical Device5
Financial Services5
Artificial Intelligence (AI)5
SaaS5

About S3 Ventures's portfolio

How many companies has S3 Ventures invested in?▸

S3 Ventures has invested in 87 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does S3 Ventures invest in?▸

S3 Ventures's top investment sectors include Software, Health Care, Medical Device, Financial Services, Artificial Intelligence (AI). The firm invests across 61 different industry categories.

What is S3 Ventures's largest investment?▸

Among tracked funding rounds, UpEquity received $200.0M in a Debt Financing round. S3 Ventures's total known invested capital is $1.2B.

What is the average investment size for S3 Ventures?▸

S3 Ventures's average investment size is $16.0M across its portfolio of 87 companies.

What are S3 Ventures's most recent investments?▸

Recent S3 Ventures portfolio additions include Stellar, Interplay Learning, Spectrawave, ZSuite Technologies, Nestimate. These companies were founded in 2020 or later.

Reach the founders behind these 87 companies
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