# Step Function Ventures

> Step Function Ventures is a VC fund backing Software. See 7 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Total investments: 7
- Last investment: Jun 2026
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/step-function-ventures

Step Function Ventures is an investment firm.

## Contacts

5 contacts available for Step Function Ventures. Shizune tracks 1 team members at Step Function Ventures. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/step-function-ventures?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 4 | 57% |
| Artificial Intelligence | 4 | 57% |
| Information Technology | 3 | 43% |
| Network Security | 2 | 29% |
| B2B | 1 | 14% |

12 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 57% |
| Pre-Seed | 1 | 14% |
| Series A | 1 | 14% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 5 | 71% |
| United Kingdom | 1 | 14% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Will Lehmann | Founder & General Partner | 1 | — |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Nebulock | Nebulock operates as an AI-driven threat hunting platform that continuously hunts across your security stack to surface false negatives and translate hunts. | $25M | Series A | Jun 25, 2026 |  |
| Unkey | Unkey operates as an open-source API authentication and authorization platform, primarily catering to user-facing APIs. The platform enables developers to create, verify, and manage API keys with low latency. Unkey's services are designed to help developers secure, manage, and scale their APIs. The company also offers an Elixir SDK, providinga simple example of its use. Unkey is also involved in solving API authentication for the next generation of developers. | $4.5M | Seed | Apr 23, 2026 |  |
| Datum | Datum is on a mission to help ~1k clouds thrive in the AI era by unlocking internet superpowers for the next generation of builders. | $10M | Seed | Nov 12, 2025 |  |
| Geordie AI | Geordie AI is an agent-native security platform that enables organizations to safely employ autonomous AI agents through real-time visibility, risk intelligence, and proactive control. | $6.5M | Seed | Sep 09, 2025 |  |
| Proofs | Proofs enable companies with APIs to build proof-of-concept (PoCs) and integrations for their prospects in minutes. Proofs follow practices for the whole software development cycle adjusted to your stack and workflow preferences and provide a preview URL along with a Docker image, while a tested and documented codebase is committed back to therepository seamlessly integrating with CI and CD systems. | $2.6M | Pre-Seed | Jun 20, 2024 |  |
| Proofs | Proofs enable companies with APIs to build proof-of-concept (PoCs) and integrations for their prospects in minutes. Proofs follow practices for the whole software development cycle adjusted to your stack and workflow preferences and provide a preview URL along with a Docker image, while a tested and documented codebase is committed back to therepository seamlessly integrating with CI and CD systems. | $2.6M | Pre-Seed | Jun 18, 2024 |  |
| Zephyr Cloud IO | The first and only enterprise scale software as a service for the orchestration and observability of composable frontend systems. | $3.5M | Seed | Apr 24, 2024 |  |

7 of 7 investments shown.

## Co-investors
- [Bain Capital Ventures](https://shizune.co/investors/profile/bain-capital-ventures) — VC Fund, 2 deals together
- [Expeditions](https://shizune.co/investors/profile/expeditions-fund) — VC Fund, 2 deals together
- [Ninja Capital](https://shizune.co/investors/profile/ninja-capital) — VC Fund, 2 deals together
- [RTP Global](https://shizune.co/investors/profile/rtp-global) — VC Fund, 2 deals together
- [AlphaGraph](https://shizune.co/investors/profile/alphagraph) — VC Fund, 1 deal together
- [Amplify Partners](https://shizune.co/investors/profile/amplify-partners) — VC Fund, 1 deal together

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Step Function Ventures invest in?

Step Function Ventures invests primarily in Software, Artificial Intelligence and Information Technology startups, most often at Seed and Pre-Seed stage. Most of the 7 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Step Function Ventures?

Public channels for Step Function Ventures include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Step Function Ventures?

The team at Step Function Ventures includes Will Lehmann (Founder & General Partner). The Team section lists each member with their title, investment count and links.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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