Matt Carbonara

Investor at Mayfield. Partnered with entrepreneurs at Cribl, Snyk, Harness, Island, Docker, Kustomer, Sublime Security. Girl-dad, recovering EE, first cable modem ASIC, MS Thesis on Neural Networks, Wakesurfer

📍 San Francisco Bay Area, United States🔄 Updated September 2026💼 39 investments📅 25 years investing🗓 Last invested Mar 2026𝕏 @upgrade_to_unlock
VC🌍 United States20+ investmentsInvested this year
39
Total investments
3
Early stage
19
Mid stage
6
Late stage
25y
Years active

Portfolio

33 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor
Nov 2024
Sublime is the new standard for email security. Not just another black box, our AI-powered detection engine detects and prevents email attacks, so security teams can spend less time on email-originated incidents.
Investor
Oct 2024
We build the models. You build the future. AGI for the enterprise, starting with software agents.
Investor & Board Observer
Sep 2024
The Only Cloud Detection & Response Solution SecOps Teams Can Trust. Prepare, Detect, Investigate, and Respond to emerging cloud threats.
Seed Investor
Aug 2024
What if the enterprise had complete control over the browser? What would it mean for security, for productivity, for work itself? Introducing Island, the Enterprise Browser - the ideal enterprise workplace, where work flows freely while remaining fundamentally secure. With the core needs of the enterprise naturally embedded in the browser itself, Island gives organizations complete control, visibility, and governance over the last mile, while delivering the same smooth Chromium-based browser experience users expect. Led by experienced leaders in enterprise security and browser technology and backed by leading venture funds -- Insight Partners, Sequoia Capital, Cyberstarts and Stripes Capital -- Island is redefining the future of work for some of the largest, most respected enterprises in the world. Welcome to work as it should be. www.island.io
Investor
Jul 2024
Endor Labs is the AppSec platform built for the AI era. It helps teams find, prioritize, and fix the most critical risks in code, whether written by humans or AI—faster. Endor Labs understands the entire structure of your codebase, from 40 year-old C++ to modern Bazel monorepos. Powered by AI agents and the industrys richest security dataset about open source code, Endor Labs doesn’t just flag issues, it reduces noise, prioritizes what matters most, and proposes intelligent remediations based on the context of your code. Whether you’re an upstart or in the Fortune 500, Endor Labs helps AppSec and development teams eliminate noisy alerts, fix code 6.2x faster, and stay compliant with standards like FedRAMP, PCI, SLSA, and NIST SSDF.
Investor & Board Observer
Jul 2024
Lakera is the world’s leading real-time GenAI security company. Customers rely on the Lakera AI Security Platform for security that doesn’t slow down their AI applications. To accelerate secure adoption of AI, the company created Gandalf, an educational platform, where more than one million users have learned about AI security. Lakera uses AI to continuously evolve defenses, so customers can stay ahead of emerging threats. Join us to shape the future of intelligent computing: www.lakera.ai/careers
Investor
May 2024
Traceable is the industry’s leading API Security company that helps organizations achieve API visibility and attack protection in a cloud-first, API-driven world. Traceable is the only intelligent and context-aware solution that powers complete API security – API discovery and posture management, API security testing, attack detection and protection, anywhere your APIs live. Traceable enables organizations to minimize risk and maximize the value that APIs bring their customers. To learn more about how API security can help your business, book a demo with a security expert.
Investor & Board Observer
Dec 2023
Ask any CIO about corporate data and they’ll happily share all the work they’ve done to make their databases secure and compliant. Ask them about other sensitive information, like contracts, financial documents, and source code, and you’ll probably get a much less confident response. Few organizations have any insight into business-critical information stored in unstructured data. There was a time when that didn’t matter. Those days are gone. Data is now accessible, copious, and dispersed, and it includes an alarming amount of business-critical information. It’s a target for both cybercriminals and regulators but securing it is incredibly difficult. It’s the data challenge of our generation. Existing approaches aren’t doing the job. Keyword searches produce a bewildering array of possibly relevant documents that may or may not be business critical. Asking users to categorize documents requires extensive training and constant vigilance to make sure users are doing their part. What’s needed is an autonomous solution that can find and assess risk so you can secure your unstructured data wherever it lives. That’s our mission. Concentric’s semantic intelligence solution reveals the meaning in your structured and unstructured data so you can fight off data loss and meet compliance and privacy mandates.
Investor
Mar 2022
At Docker, we simplify the lives of developers who are making world-changing apps. Docker helps developers bring their ideas to reality by conquering the complexity of app development. We simplify and accelerate workflows with an integrated development pipeline and application components. Actively used by millions of developers around the world, Docker Desktop and Docker Hub provide unmatched simplicity, agility and choice.
Investor
Aug 2021
Cribl, the Data Engine for IT and Security, empowers organizations to transform their data strategy. Powered by a data processing engine purpose-built for IT and Security, Cribl’s product suite is a vendor-agnostic data management solution capable of collecting data from any source, processing billions of events per second, automatically routing data for optimized storage, and analyzing any data, at any time, in any location. With Cribl, IT and Security teams have the choice, control, and flexibility required to adapt to their ever-changing data needs. Cribl’s offerings–Stream, Edge, and Search–are available either as discrete products or as a holistic solution.
Investor
May 2021
Snyk, the leader in secure AI software development, empowers organizations to build fast and stay secure by unleashing developer productivity and reducing business risk. The company’s AI Trust Platform seamlessly integrates into developer and security workflows to accelerate secure software delivery in the AI Era. Snyk delivers trusted, actionable insights and automated remediation, enabling modern organizations to innovate without limits. Snyk is redefining secure AI-driven software delivery for over 4,500 customers worldwide today. Snyk was named a Leader in the 2023 Gartner Magic Quadrant™ for Application Security Testing (AST) and in The Forrester Wave™: Software Composition Analysis (SCA) 2023, and has been recognized on the Forbes Cloud 100 2022 along with the 2023 CNBC Disruptor 50. For more information, visit https://snyk.io.
Investor
Feb 2021
Eightfold AI is the industry’s first Talent Intelligence Platform that transforms how you hire, retain, and grow a diverse workforce. The platform is built with three pillars in mind: * First, we believe that people are every enterprise’s greatest asset, and we want to put them at the center. We aggregate all people data within an enterprise - from applicants to alumni - which is currently siloed across many different point solutions. This becomes the richest & most comprehensive Talent Network for each enterprise. * Second, we use data to provide intelligence on what people are capable of doing instead of just what they have done in the past. This allows enterprises to more effectively match people to the right opportunities. * Third, using AI, the platform continuously learns from enterprise and individual performance to predict future roles, performance, and career alternatives.
Investor
Jan 2021
Harness is a rapidly growing startup that is disrupting the software delivery market. The Harness Software Delivery Platform includes product modules for every aspect of software delivery, including: Continuous Integration, Continuous Delivery, Feature Flags, Cloud Cost Management, Service Reliability Management, Security Testing Orchestration, Chaos Engineering, Software Engineering Insights, Continuous Error Tracking, Code Repository, Internal Developer Portal, Software Supply Chain Assurance, Infrastructure as Code Management and AI/ML infused throughout with AI Development Assistant (AIDA). The platform is designed to help companies accelerate their cloud initiatives as well as their adoption of containers and orchestration tools like Kubernetes and Amazon ECS and make software delivery easier, giving devs their nights and weekends back.
Investor
Dec 2020
Deepgram is the real-time API platform powering the trillion-dollar Voice AI economy. Backed by a $130M Series C at a $1.3B valuation, Deepgram is trusted by 200,000+ developers and 1,300+ organizations to build Voice AI products, platforms, and autonomous agents with the lowest latency, highest accuracy, and enterprise reliability. Our voice-native foundation models and runtime infrastructure have processed 50,000+ years of audio and over 1 trillion words, making Deepgram the most experienced voice AI platform in the world. Industry-leading models & platform: 👂 Nova-3 — the world’s most accurate real-time speech-to-text model 🔊 Aura-2 — professional, enterprise-grade text-to-speech 💬 Flux — the first Conversational Speech Recognition model designed to handle interruptions 🚀 Voice Agent API — enterprise-ready, real-time conversational AI 🧠 Saga — the Voice OS Beyond core infrastructure, Deepgram is expanding the Voice AI ecosystem through: 💪 Powered by Deepgram, supporting voice products built by leading AI startups and enterprise organizations 🌉 A new Voice AI Collaboration Hub in San Francisco for builders, partners, and the voice community 🍔 The acquisition of OfOne, delivering real-time Voice AI for restaurants and drive-thru operations with 95%+ containment 📃 A growing patent portfolio in Voice AI Much like APIs powered the payments and cloud economies, Deepgram is building the foundation for a trillion-dollar B2B Voice AI economy—centered on the most natural human interface: voice.
Investor
Oct 2020
Skans AI-powered Process Intelligence drives innovation, cost savings, customer experience, automation effectiveness, and productivity, leading to tangible and scalable transformation.
Show all 33 investments ↓
Experience · 46 entries
All (46)
Investments (39)
Board (13)
2026
Investor
Mar 2026
For more than 56 years, we’ve partnered with founders from their first idea through the long arc of building iconic companies. Our track record includes 125+ IPOs and 225+ acquisitions, reflecting our belief that great companies are built by people first. Across multiple market cycles, our team brings deep investing and operating experience to support founders with conviction, long-term capital, and hands-on partnership. Headquartered in Silicon Valley, Mayfield backs founders building the future of AI. People First. From Inception. Learn more at mayfield.com.
2024
Investor
Nov 2024
Sublime is the new standard for email security. Not just another black box, our AI-powered detection engine detects and prevents email attacks, so security teams can spend less time on email-originated incidents.
Investor
Oct 2024
We build the models. You build the future. AGI for the enterprise, starting with software agents.
Investor & Board Observer
Sep 2024
The Only Cloud Detection & Response Solution SecOps Teams Can Trust. Prepare, Detect, Investigate, and Respond to emerging cloud threats.
Seed Investor
Aug 2024
What if the enterprise had complete control over the browser? What would it mean for security, for productivity, for work itself? Introducing Island, the Enterprise Browser - the ideal enterprise workplace, where work flows freely while remaining fundamentally secure. With the core needs of the enterprise naturally embedded in the browser itself, Island gives organizations complete control, visibility, and governance over the last mile, while delivering the same smooth Chromium-based browser experience users expect. Led by experienced leaders in enterprise security and browser technology and backed by leading venture funds -- Insight Partners, Sequoia Capital, Cyberstarts and Stripes Capital -- Island is redefining the future of work for some of the largest, most respected enterprises in the world. Welcome to work as it should be. www.island.io
Show all 46 entries ↓
Investment activity
2001–2026 · 39 investments
200112003120041201122012120141201692018220194202032021420221202312024720261
Recent (last 2 years)Earlier