S3 Ventures is the largest venture capital firm born in Texas, investing nationwide in business technology, digital experiences, and healthcare technology. Founded in 2005 and based in Austin, the firm leads Seed, Series A, and Series B rounds and has raised over $1 billion in total assets under management across eight funds.
Deal activity increased 50% year-over-year (6 deals in the last 12 months). Average disclosed round size is $17.5M (across 61 rounds with reported amounts).
Portfolio
54
Fund Size
$250M
Top Stage
Series A
Last 12 Mo
11
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
62 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| RRapidPulse, Inc. | Series B | $48M | Jul 2026 |
 Earlytrade | Unknown | $25M | Jun 2026 |
 Endovascular Engineering | Series C | $80M | Apr 2026 |
 Buzz Solutions | Growth | $5M | Jan 2026 |
 Buzzsolutions Co | Unknown | $20M | Jan 2026 |
| Earlytrade | Series A | $25M | Jan 2026 |
| RRapidPulse, Inc. | Series B | $48M | Jan 2026 |
 Opine | Seed | $5M | Dec 2025 |
 VAHATICOR | Series B | $23M | Nov 2025 |
| VVentureMed Group | Series C | $28M | Oct 2025 |
 Folia Health | Series A | $10.5M | Oct 2025 |
 Nestimate | Seed | $3M | Sep 2025 |
 Databahn AI | Series A | $17M | Jun 2025 |
 Mavvrik | Seed | $6.2M | Feb 2025 |
 Prokeep | Series A | $25M | Nov 2024 |
 SpectraWAVE | Series B | $50M | Sep 2024 |
 BrainCheck | Series B | $15M | Mar 2024 |
 ControlRooms.ai | Series A | $10M | Aug 2023 |
 Videate | Unknown | $6.5M | Jan 2023 |
 Videate | Unknown | $6.5M | Jan 2023 |
| Prokeep | Seed | $9M | Jun 2022 |
 Repvue | Seed | $5M | May 2022 |
 Sudozi | Seed | $4.3M | May 2022 |
| Videate | Seed | $3M | Jan 2022 |
| Videate | Seed | $2.8M | Jan 2022 |
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Top Co-Investors
Tensility Venture Partners5 shared
GTMfund4 shared
Silverton Partners4 shared
Knoll Ventures3 shared
Triangle Tweener Fund3 shared
Menlo Ventures3 shared
M253 shared
Debut Capital3 shared
Backstage Capital3 shared
Altos Ventures Management, Inc.3 shared
Brick & Mortar Ventures3 shared
Techstars3 shared
Tokio Marine Future Fund2 shared
Alpha Square Group2 shared
Amity Ventures2 shared
Origin Ventures2 shared
FJ Labs2 shared
Sierra Ventures2 shared
SJF Ventures2 shared
Owl Ventures2 shared
Last updated: 8 September 2026