Greylock’s AI Bets: A Complete Portfolio Breakdown
Greylock has backed some of the most influential AI startups. Explore their AI portfolio, key investments, and the trends shaping the future.
From productivity agents to security automation, the storied venture capital firm is placing strategic bets across the AI stack. We reviewed Greylock’s publicly listed portfolio and mapped out every AI startup they’ve backed, what they’re building, and where the firm is placing its biggest bets.
Let’s dive in.
🔍 Portfolio Snapshot
Here’s a breakdown of Greylock’s AI investments by company, category, and stage:
| Company | Description | Greylock Stage | Sector | Latest Disclosed |
|---|---|---|---|---|
| Snorkel AI | Data-centric platform for enterprise AI & foundation models | Seed | AI Infrastructure | — |
| Abnormal Security | AI-native email security for cloud enterprises | Seed | AI Security | $250M raise (2024) |
| Adept AI | Agentic AI lab building general-purpose productivity tools | Seed | Foundation Models / Agentic AI | — |
| Axiamatic | ERP modernization via domain-specific AI agents | Series A | Agentic AI / Enterprise SaaS | — |
| Cogent Security | Autonomous vulnerability management using agentic AI | Seed | AI Security | $11M seed (2025) |
| Cresta | AI coaching + customer service automation for enterprise teams | Growth | Vertical AI SaaS | — |
| 7AI | AI-driven security operations agents | Seed | AI Security | $36M seed (2025); $130M Series A (2025) |
| Mandolin | Automating specialty drug access using AI agents | Seed | Healthcare AI | — |
| Netic | Autonomous AI “revenue engine” for essential services businesses | Seed | Agentic AI / RevOps | Greylock-led seed + follow-on (2025) |
| Baseten | Model inference + deployment infrastructure for production AI | Seed | AI Infrastructure | $150M Series D (2025) – Greylock participated |
| Braintrust | AI evaluation + testing infrastructure for LLM apps | Seed | AI Developer Tools | Greylock seed (2023); continued support noted |
| SuperMe | AI-native professional network with “instant expert” answers | Seed | AI Search / Networks | $6.8M seed led by Greylock (2025) |
| Fable | AI-generated security training to change employee behavior | Early | AI Security | $31M raise reported (2025) |
This page is updated monthly. Know a startup we missed? Email us to get it added.
Greylock's Strategy Signals
A few themes jump out from their AI portfolio:
Agentic AI
Greylock is leaning into agents that execute high-value work (not just “copilots”): Adept, Axiamatic, Netic, and healthcare workflows like Mandolin.
AI-Driven Security
This is now clearly a pillar: Abnormal, Cogent, 7AI, and Fable map to detection, vuln mgmt, SOC agents, and human security behavior.
Vertical SaaS with AI at the Core
Startups like Cresta and Mandolin show Greylock’s interest in using AI to automate complex, high-cost processes inside large industries like sales and healthcare.
AI Infrastructure & Builder Tools
Greylock keeps backing “picks & shovels” infrastructure: Snorkel AI, Baseten, Braintrust.
This is a thesis-driven portfolio built for enterprise adoption, with a heavy bias toward systems that automate real work.
Want More VC Portfolios Like This?
Be sure to check out:
- a16z AI Portfolio: Startups Backed by Andreessen Horowitz
- NVentures Portfolio: AI Startups Backed by Nvidia
- Thrive Capital Portfolio: AI Startups Backed by Thrive
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