John Cowgill
Partner @ Costanoa Ventures
San Francisco, United States
John Cowgill is a Partner of Costanoa Ventures. He previously worked at McKinsey & Company as a Business Analyst. John Cowgill attended Northwestern University.
- Total investments:
- 36
- Last investment:
- Lead investor:
- 53%
Last updated:
For AI agents: llms.txt
Industries John Cowgill invests in
Stages John Cowgill invests in
Countries John Cowgill invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Investment Focus
Industry
- Software 8 (22%)
- Information Technology 5 (14%)
- Artificial Intelligence 5 (14%)
- Cyber Security 4 (11%)
- Security 3 (8%)
Stage
- Seed 10 (28%)
- Series A 9 (25%)
- Series B 9 (25%)
- Series C 3 (8%)
- Pre-Seed 1 (3%)
Country
- United States 16 (44%)
- Canada 1 (3%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Empirical Security
|
Empirical builds mathematical models for security data. | $25M / Series A / Jul 20, 2026 | |
Manifold
|
Manifold Security offers an agentless AI Detection and Response (AIDR) platform for securing autonomous AI agents on enterprise endpoints.It captures agent behaviors in real-time, including API calls, file access, command execution, and interactions with external services like MCP servers or databases. Security teams gain visibility intoagent-tool-system relationships, mapping connections to internal and external resources without new infrastructure, gateways, or proxies. | $8M / Seed / Mar 18, 2026 | |
Definite
|
Definite is a data platform that enables businesses to connect, organize, and analyze their data from various sources, including CRMs, billing systems, and marketing platforms. The platform consolidates data into a unified view and uses AI to automate workflows and generate insights. Users can ask questions in plain language and receive reports andvisualizations based on their data, eliminating the need for SQL queries. The interface allows for the creation of dashboards and automation of data analysis without requiring extensive technical expertise. Definite provides secure data storage and is designed to scale with the growth of the business, helping organizations make data-driven decisions more efficiently. | $10M / Seed / Aug 21, 2025 | |
|
Empirical Security
|
Empirical builds mathematical models for security data. | $11.9M / Seed / Jul 17, 2025 | |
Muon Space
|
Muon Space is an end-to-end space systems company that designs, builds, and operates mission-optimized satellite constellations to deliver critical data and enable real-time compute and decision-making in space. Its proprietary technology stack, Halo™, integrates advanced spacecraft platforms, robust payload integration and management, and apowerful software-defined orchestration layer to enable high-performance capabilities at unprecedented speed – from concept to orbit. With state-of-the-art production facilities in Silicon Valley and a growing track record of commercial and national security customers, Muon Space is redefining how critical Earth intelligence is delivered from space. | $44.5M / Series B / Jun 12, 2025 | |
dweva.com
|
System Two Security offers a platform that combines AI agents and assistants to support detection engineering teams in processing intelligence, creating new detections, and managing detection libraries. The system enables users to draft and refine detections based on threat intelligence and coverage gaps. | $7M / Venture - Series Unknown / Dec 04, 2024 | |
Numa
|
Numa is an AI-powered communication platform for automotive dealerships that turns missed calls into ROs and helps your team delight customers with fast responses, resulting in higher CSI and more dollars per RO. The company's platform helps turn missed calls into revenue opportunities (ROs), ensuring that dealerships never miss a potentialcustomer interaction. | $32M / Series B / Oct 01, 2024 | |
|
Muon Space
|
Muon Space is an end-to-end space systems company that designs, builds, and operates mission-optimized satellite constellations to deliver critical data and enable real-time compute and decision-making in space. Its proprietary technology stack, Halo™, integrates advanced spacecraft platforms, robust payload integration and management, and apowerful software-defined orchestration layer to enable high-performance capabilities at unprecedented speed – from concept to orbit. With state-of-the-art production facilities in Silicon Valley and a growing track record of commercial and national security customers, Muon Space is redefining how critical Earth intelligence is delivered from space. | $56.7M / Series B / Aug 05, 2024 | |
RunReveal
|
RunReveal is a security data platform designed to address the changing hazards of the digital era. | $2.5M / Seed / May 01, 2024 | |
|
RunReveal
|
RunReveal is a security data platform designed to address the changing hazards of the digital era. | $2.5M / Pre-Seed / May 01, 2024 | |
| See all 36 investments → | |||
Co-Investors
About Costanoa Ventures
Costanoa Ventures leads Formation, Seed, and Series A stage investments in companies that change the way the world does business.
Costanoa Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Amy Cheetham
Partner
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David Cheng
General Partner
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Gregory Sands
Founder and Managing Director
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Jim Wilson
Partner
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John Cowgill
Partner
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FAQ
What does John Cowgill invest in?
John Cowgill invests primarily in Software, Information Technology and Artificial Intelligence startups, most often at Seed and Series A stage. Most of the 36 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 John Cowgill?
Public channels for John Cowgill 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.
When did John Cowgill last invest?
The most recent investment recorded for John Cowgill closed in Jul 2026. Shizune tracks 36 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
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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