Step Function is a venture capital firm that focuses on investing in technical founders at the earliest stages, particularly in infrastructure software, with core areas including data/AI infrastructure, cybersecurity, and developer tools. Their strategy involves being the first institutional investor, providing hands-on support, domain expertise, and a strong network to help founders succeed from the outset.
50% of their portfolio is in Infrastructure & Cloud. Their most common stage is pre-seed (50% of deals).
Portfolio
2
Fund Size
$2.6M
Top Stage
Pre Seed
Last 12 Mo
0
Portfolio Breakdown
Stage Distribution
Sector Distribution
Portfolio
2 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Zephyr Cloud | Seed | $3.5M | Sep 2024 |
 Proofs | Pre-Seed | $2.4M | Jun 2024 |
Top Co-Investors
Earlybird Digital East1 shared
Expeditions Fund1 shared
RTP Global1 shared
True Ventures1 shared
Nina Capital1 shared
Night1 shared
Last updated: 4 May 2026