# Decibel Partners

> Decibel Partners is a VC fund backing Cyber Security. See 68 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Palo Alto, United States
- Total investments: 68
- Last investment: Jun 2026
- Lead investor: 54%
- Fund size: $500M
- Last fund: Mar 2019
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/decibelvc/
- X (Twitter): https://twitter.com/decibelvc
- Website: https://www.decibel.vc/

Decibel Partners is a VC fund in Palo Alto focused on Cyber Security and Information Technology. Decibel is an independent venture capital firm that provides resources to entrepreneurs.

## Contacts

5 contacts available for Decibel Partners. Shizune tracks 3 team members at Decibel Partners. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/decibel-vc?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $3.5M–$12M |
| Series A | $12M–$29M |
| Series B | $16M–$60M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Cyber Security | 13 | 19% |
| Information Technology | 13 | 19% |
| Artificial Intelligence | 13 | 19% |
| Software | 11 | 16% |
| SaaS | 7 | 10% |

54 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 25 | 37% |
| Series A | 23 | 34% |
| Series B | 13 | 19% |
| Series C | 1 | 1% |
| Series D | 1 | 1% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 26 | 38% |
| Canada | 2 | 3% |
| Spain | 1 | 1% |
| Australia | 1 | 1% |
| Czech Republic | 1 | 1% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Francois Dufour | Marketing Partner and CMO | 1 | https://shizune.co/investors/profile/francois-dufour |
| Dan Nguyen-Huu | Partner | 9 | https://shizune.co/investors/profile/dan-nguyen-huu |
| Stacey Wueste | Business Development Partner | 0 | https://shizune.co/investors/profile/stacey-wueste |

## 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 |  |
| Ent.AI | Ent.AI is an end-to-end platform that enables organizations to rapidly build world-class AI models and applications. They provide video and image annotation, text and document annotation, 3d point cloud annotation, and data sourcing. Cloud-hosted deep learning models that provide human-like interpretation of video, image, audio and text. | $100M | Seed | Jun 16, 2026 |  |
| Mallory | Mallory provides an AI-native threat intelligence platform that monitors global cyber threats, correlates them with a customer's attack surface, and delivers prioritized, actionable insights for security teams. It ingests data from thousands of sources, automates enrichment and triage, and integrates with existing tools like SIEM and SOAR forautomated responses such as ticket creation and notifications. The platform supports natural language monitoring, generates decision traces for audits, and focuses on answering whether an organization is affected by events like zero-days or supply chain breaches. |  | Seed | Apr 06, 2026 |  |
| Censys | Censys provides an internet intelligence platform for threat hunting and exposure management. The company's platform gives organizations a comprehensive real-time view of global networks and devices to help businesses discover the devices, networks, and infrastructure on the internet. | $40M | Series D | Mar 31, 2026 |  |
| Mantis biotech | Mantis biotech builds a unified biomedical device testing and regulatory platform | $7.4M | Seed | Dec 19, 2025 |  |
| Strella | Strella is a Software as a Service (SaaS) solution that allows innovative product teams to run fast, continuous user research using AI. | $14M | Series A | Oct 16, 2025 |  |
| Nebulock | Nebulock operates as an AI-driven threat hunting platform that continuously hunts across your security stack to surface false negatives and translate hunts. | $6M | Seed | Jul 29, 2025 |  |
| E2B | E2B is constructing the cloud for AI bots a platform and architecture that allows AI bots to operate freely and as first-class citizens. | $21M | Series A | Jul 28, 2025 |  |
| Scrunch | Scrunch AI is a platform that empowers businesses to understand and optimize their presence in AI search. | $15M | Series A | Jul 22, 2025 |  |
| Confident Security | Cofident Security offers an end-to-end encryption tool that wraps around foundational models for security | $4.2M | Seed | Jul 17, 2025 |  |

10 of 68 investments shown.

## Co-investors
- [Google Ventures](https://shizune.co/investors/profile/google-ventures) — VC Fund, 10 deals together
- [Bain Capital Ventures](https://shizune.co/investors/profile/bain-capital-ventures) — VC Fund, 7 deals together
- [Greylock](https://shizune.co/investors/profile/greylock) — VC Fund, 7 deals together
- [IQT](https://shizune.co/investors/profile/in-q-tel) — VC Fund, 7 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 6 deals together
- [Athos Capital](https://shizune.co/investors/profile/athos-capital) — VC Fund, 4 deals together

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## FAQ

### What does Decibel Partners invest in?

Decibel Partners invests primarily in Cyber Security, Information Technology and Artificial Intelligence startups, most often at Seed and Series A stage. Most of the 68 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Decibel Partners's check size?

Decibel Partners typically joins rounds of $3.5M–$12M at Seed, $12M–$29M at Series A and $16M–$60M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Decibel Partners participates in.

### How do I contact Decibel Partners?

Public channels for Decibel Partners include LinkedIn, X (Twitter) and the website linked on this profile. 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 Decibel Partners?

The team at Decibel Partners includes Francois Dufour (Marketing Partner and CMO), Dan Nguyen-Huu (Partner) and Stacey Wueste (Business Development 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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