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S3 Ventures — Portfolio

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

84
Companies
$1.1B
Total invested
$16.1M
Avg. check
66
Industries
Software 8Health Care 5Medical Device 5Financial Services 5SaaS 5Medical 4+60 more
Founder contacts

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Portfolio companies

Showing 124 of 84
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
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
Endovascular Engineering
April 2026

Endovascular Engineering develops and deploys advanced clot removal solutions for the treatment of venous thromboembolism.

Clinical Trials · Menlo Park$80.0M Series C
Schematic
April 2026

Schematic is a B2B SaaS platform designed to simplify pricing and packaging for software companies.

B2B · Boulder$6.5M Seed
Avtal
March 2026

Avtal is a communications technology company that specializes in receivables management, omnichannel outreach, and payment portal.

Financial Services · Austin$24.0M 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 Care5
Medical Device5
Financial Services5
SaaS5
Medical4

About S3 Ventures's portfolio

How many companies has S3 Ventures invested in?

S3 Ventures has invested in 84 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, SaaS. The firm invests across 66 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 $1.1B.

What is the average investment size for S3 Ventures?

S3 Ventures's average investment size is $16.1M across its portfolio of 84 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.

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