# Open Source Security Foundation funding: rounds and investors

> Open Source Security Foundation has raised $5.0M across 2 rounds since 2023. Investors include Amazon Web Services. Every round with its source.

Source: https://millionrounds.com/company/open-source-security-foundation (Millionrounds; every figure on the page links to its filing or article)

United States · [Venture startup](https://millionrounds.com/companies)

# Who invested in *Open Source Security Foundation*

2 rounds we have observed, with the one investor named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

IT Services

Raised 8 months ago

Funding summary Updated 26 Oct 2026

**$5.0M** raised across 2 rounds since 2023, from 2 sources

- **Latest round:** Venture Mar 2026
- **Biggest round:** $5.0M Grant · May 2023
- **Investors:** 1

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2024 2025 2026

**$5.0M** Grant

**?** Venture

- **First round:** Grant, $5.0M
- **Biggest round:** $5.0M
- **Between rounds:** 2.8 years

## The rounds

- **Mar 2026** Venture **Amount undisclosed** *1 new* [Amazon Web Services](https://millionrounds.com/fund/amazon-web-services) Source recorded
- **May 2023** Grant **$5.0M** No investor was named in the report. Source recorded

## Founders and team

From Open Source Security Foundation's own website: 2 on the team.

- **Stephen Augustus** Technical Architect - Office of the CTO
- **Zach Steindler** and Principal Engineer

## Everyone who backed them

[Amazon Web Services](https://millionrounds.com/fund/amazon-web-services) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=open-source-security-foundation).

## Quick answers about Open Source Security Foundation

### Who invested in Open Source Security Foundation?

Open Source Security Foundation's investors include Amazon Web Services.

### How much has Open Source Security Foundation raised?

Open Source Security Foundation has raised $5.0M across 2 rounds since 2023. One round did not disclose an amount, so the total is a floor.

### When did Open Source Security Foundation last raise?

Open Source Security Foundation's most recent round was a Venture in Mar 2026.

### What was Open Source Security Foundation's biggest round?

Open Source Security Foundation's largest round on record is $5.0M (Grant), in May 2023.

### Who backed Open Source Security Foundation first?

Open Source Security Foundation's first round on record, in Mar 2026, was backed by Amazon Web Services.

### What stage is Open Source Security Foundation at?

Open Source Security Foundation's latest named round is a Venture, in Mar 2026.

### Where is Open Source Security Foundation based?

Open Source Security Foundation is based in the United States.

## Companies like Open Source Security Foundation

In the same sector, and raised in the last eighteen months.

[**Chariot Claims** $23M · Oct 2026](https://millionrounds.com/company/chariot-claims)[**Subeca** $9.0M · Oct 2026](https://millionrounds.com/company/subeca)[**FlexCompute** $53M · Oct 2026](https://millionrounds.com/company/flexcompute)[**Negosh** $3.1M · Oct 2026](https://millionrounds.com/company/negosh)[**StarLifter** $4.0M · Oct 2026](https://millionrounds.com/company/starlifter)[**Litewave.AI** $1.7M · Oct 2026](https://millionrounds.com/company/litewave-ai)

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