Organization · Venture Capital

S3 Ventures

S3 Ventures is a venture capital firm based in Austin, Texas, focused on early-stage investments in business software and healthcare technology. With over $1 billion in assets under management, they provide patient capital to visionary founders across the United States.

Venture CapitalFunderPublisher

Overview

What S3 Ventures does

What S3 Ventures is

S3 Ventures is a venture capital firm based in Austin, Texas, focused on early-stage investments in business software and healthcare technology. With over $1 billion in assets under management, they provide patient capital to visionary founders across the United States.

How it participates in the startup ecosystem

The current public profile supports funder and publisher capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.

Operational profile

Organization status and context

Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.

Operational status
Active
Organization type
Venture Capital
Founded
Founded in 2005
Approximate age
About 21 years
Structured capabilities
Funder · Publisher
Last reviewed
March 27, 2026

Official channels

Find S3 Ventures elsewhere

Open the official website or a supported primary organization account.

Capability profile

S3 Ventures as a funder

Investment thesis

S3 Ventures focuses on providing patient capital to early-stage technology companies, particularly in business software and healthcare technology, leveraging a unique single-LP structure for maximum alignment and long-term growth.

Focus narrative

S3 Ventures primarily invests in technology companies, focusing on two main sectors: Business Software and Healthcare Technology. The firm typically leads Seed, Series A, and Series B rounds, with initial investments ranging from $500,000 to over $15 million, and the capacity to invest more than $25 million over time.

Value beyond capital

S3 Ventures adds value to its portfolio companies through a unique single-LP structure that allows for patient capital and long-term support without the distractions of fundraising cycles. The firm focuses on building strong relationships with its portfolio companies, providing strategic guidance and resources to help them scale effectively.

Terms and economics

Typical check
$500,000–$15,000,000
Sweet spot
$25,000,000

Focus and fit

Stages
Seed · Series A · Series B

Availability

Currently deploying
Yes

Portfolio and track record

Recorded portfolio count
75
Recorded notable exits
Alkami, Levelset, and Favor

Portfolio context

S3 Ventures has made over 75 startup investments, which have collectively raised more than $3.5 billion. Notable portfolio companies include Acessa Health, which focuses on uterine fibroid treatment and was acquired by Hologic; Alkami, an online banking platform that went public on NASDAQ; Alleviant, specializing in interatrial shunt therapy for heart conditions; Allstacks, providing predictive DevOps analytics; Arpio, offering cloud disaster recovery solutions; and Briggo, a robotic barista company acquired by Coca-Cola.

Capability profile

S3 Ventures as a publisher

Editorial focus

S3 Ventures is a venture capital firm that invests in technology companies, primarily focusing on business software and healthcare technology. The firm leads Seed, Series A, and Series B rounds, providing initial investments ranging from $500,000 to over $15 million, with the capacity to invest more than $25 million over time. Founded in 2005 and based in Austin, Texas, S3 Ventures is backed by a single limited partner, allowing for a unique focus on long-term company building without fundraising distractions.

Audience value

S3 Ventures offers patient capital to early-stage companies, enabling them to focus on long-term growth without the pressures of frequent fundraising. Their unique single-LP structure allows for maximum alignment and support for portfolio companies.

Format and cadence

Content formats
newsletter
Primary platform
Website
Cadence
null

Availability

Guest pitch state
Not currently accepting

Audience and focus

Audience
Investors · Founders

Flagship work and coverage

Flagship properties

S3 Ventures publishes the S3 Newsletter, which is available for subscription via their website.

Notable coverage

S3 Ventures has been recognized for its significant portfolio, which includes over 75 startup investments that have collectively raised more than $3.5 billion. Notable companies in their portfolio include Alkami, Acessa Health, and Allstacks.

Common questions

What to know about S3 Ventures

Upseed classifies S3 Ventures under the Venture Capital organization type. Its current public profile includes funder and publisher capabilities.

Next step

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Source and update disclosure

Know what this page is based on

Source basis

Public organization and program material, official websites, and structured Upseed records.

Last reviewed

March 27, 2026

Known limits

Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.

Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.