Introducing Parallax: The AI Energy Company
Greylock co-leads Parallax's Series A. Purpose-built next-gen gas turbines, 3D printed, to solve America's 100 GW power shortage for the AI era.
Greylock2 min read
Portfolio News
17 stories
Introducing Antioch: The Simulation Platform for Physical AI
Enabling teams to develop, test and validate AI systems in high-fidelity simulation. Today, we’re excited to announce that Greylock is leading the Series A in Antioch, a company building the simulation platform for physical AI. AI has transformed how quickly software teams can build products.…
Greylock2 min read
Introducing Oak: The AI-Native Identity Operating System
An AI-native platform that governs every identity across an organization. Identity has become the largest unresolved problem in enterprise security. Legacy tooling built to govern it (IGA, IAM) was designed for a static world of human users and periodic certification. Two shifts have broken that…
Greylock2 min read
Introducing Niteshift: The Full-Stack Cloud for Coding Agents
The full-stack cloud for coding agents, pairing frontier agents with your dev environment. The best software engineering teams have invested relentlessly in their internal developer tools. Better tools meant developers could write more code, ship faster, and build better products. Historically, the…
Greylock3 min read
Introducing Altara: AI for the Physical Sciences
Accelerating the physical sciences from data to breakthroughs. The physical sciences – semiconductors, batteries, advanced materials, specialty chemicals – underpin the most economically consequential industries in the world. They are also among the least well-served by modern software and AI. The…
Greylock2 min read
Introducing Axiamatic: AI for Enterprise Transformation
AI that makes enterprise transformations easier, not more complex. We are excited to announce that Axiamatic is coming out of stealth with $54M in financing, including a Series Seed led by Greylock and a Series A financing led by our friends at Bessemer, to build the industry’s leading AI platform…
Greylock3 min read
Introducing Cylake: AI-Native Cybersecurity with Total Data Sovereignty
We are excited to announce that Greylock led a $45M seed round in Cylake, a startup focused on building the industry’s leading AI-native cybersecurity for customers that require total data sovereignty. Cylake is founded by three cybersecurity veterans, who have shaped the modern security landscape.…
Greylock2 min read
Introducing Tin Can: The Landline is a Network Again
The landline was the original social network. In the 90s and 00s, it was how we made plans after school, called friends and family on weekends, and learned how to be present with another person. Attention wasn’t split across feeds or back and forth texting; we simply had conversations with minimal…
Greylock3 min read
Congrats, Chronosphere and Palo Alto Networks!
Congratulations to Martin Mao, Rob Skillington, and the entire Chronosphere team on today’s milestone: Palo Alto Networks has signed a definitive agreement to acquire Chronosphere. By bringing together Chronosphere’s technology and team, with Palo Alto Networks’ scale and product breadth, together,…
Greylock3 min read
Introducing AirOps: The System of Action for Organic Growth
Marketers do not win by watching dashboards; they win by acting on them. In today’s AI era, the internet’s front door has shifted. What once started with a Google search now begins with a question to an AI assistant. Apps like ChatGPT, Perplexity, and Gemini are reshaping how people discover and…
Greylock2 min read
Introducing SuperMe: The AI-Native Professional Network
Most expertise is not yet legible to LLMs. The best professionals demonstrate it in private contexts: internal conversations, product docs, meeting notes, and, most often, in their own heads. For too long, the people elevated to “expert” status were those who invested most in their public persona,…
Greylock3 min read
Introducing Tenzai: Autonomous AI Hackers
We are excited to announce that Greylock led a $75m seed round financing at Tenzai, a cybersecurity startup focused on building the industry’s leading agentic AI penetration testing platform. Tenzai agents actively hack, exploit, and fix the hardest-to-find vulnerabilities across enterprise…
Greylock2 min read
Introducing Fable: AI-Native Human Risk Management
In the AI era, attackers are becoming master manipulators — deploying highly convincing deepfakes, real-time voice impersonations, SMS phishing attacks, and contextual social engineering. The human layer is now the most actively targeted and most difficult to defend. Despite billions spent on tools…
Greylock2 min read
Introducing Cogent: AI Agents for Vulnerability Management
In today’s AI-driven threat environment, attackers exploit vulnerabilities faster than ever before, leaving vulnerability management teams struggling to keep pace and enterprises exposed. Cogent Security tackles this critical issue by reimagining vulnerability management — one of cybersecurity’s…
Greylock2 min read
Congratulations, Predibase and Rubrik!
Congratulations to Greylock portfolio companies Predibase and Rubrik on their announcement: Rubrik has entered into an agreement to acquire Predibase. This powerful combination brings together optimized, fine-tuned AI models and robust, governed data, designed to support enterprises worldwide in…
Greylock2 min read
Introducing Mandolin: AI Teammates for Healthcare
When we first met Will Yin and Rohit Rustagi, it was clear that they were obsessed with solving an urgent problem in healthcare: closing the time-to-access for specialty therapies that treat conditions like cancer and Alzheimer’s. In our meeting, Will articulated how he could build “a new kind of…
Greylock3 min read
Introducing Aspora: The Financial Super App for the Global Diaspora
It’s rare to meet a founder pursuing their life’s work with such clarity. Parth Garg is one of those founders. Today, we’re excited to announce our investment in Aspora, co-leading the Series B just months after participating in the Series A. We doubled down on our investment after we saw Parth’s…
Greylock2 min read
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