Agents Infrastructure
The picks and shovels: sandboxed VMs, headless browsers, code execution runtimes, and orchestration layers that RL environments run on. These companies handle sandboxed environment isolation, snapshotting, and scale, and many generate training trajectories automatically. They don't author tasks; they sell the substrate that everyone else's environments and evals execute in.
12 startups
| Name | Domains | Location | Team | Funding | Raising |
|---|---|---|---|---|---|
| Anchor Browser Reliable browser automation platform for agentic AI | Browser, Agents Infrastructure | Tel Aviv | 1-10 | Seed, $6M (Blumberg Capital, Gradient Ventures, Nov 2025) | - |
| Browserbase Headless browser infrastructure powering web agents | Browser, Agents Infrastructure | San Francisco | 26-50 | Series B, $40M at $300M valuation (June 2025); $67.5M total | - |
| Cua Open-source computer-use agent infrastructure and environments | Coding, Computer Use, Agents Infrastructure | San Francisco | 1-10 | Pre-seed/Seed (YC X25) | - |
| E2B Open-source cloud sandboxes for AI agents | Agents Infrastructure, Coding | San Francisco | 26-50 | Series A, $21M (Insight Partners, July 2025); $32M total | - |
| HUD Evals and RL environments platform for computer-use agents | Computer Use, Coding, Long Horizon, Agents Infrastructure, Custom Environments | San Francisco, Singapore | 11-25 | $15M raised (YC W25, Exceptional Capital) | - |
| Kernel Browser infrastructure for AI agents | Browser, Agents Infrastructure | San Francisco | 1-10 | Seed + Series A, $22M (Accel, 2025) | - |
| Morph Infinibranch VMs: snapshot and branch entire environments for agents | Agents Infrastructure | San Francisco | 11-25 | ~$19M total (seed led by Khosla Ventures) | - |
| Nous Research Open AI lab behind the Atropos RL environments framework | Machine Learning, Agents Infrastructure | New York | 11-25 | Series A, $50M led by Paradigm (~$1B valuation, 2025) | - |
| Prime Intellect Open superintelligence stack: compute, RL environments hub, and sandboxes | Machine Learning, Agents Infrastructure, Multi-Domain | San Francisco | 26-50 | Series A, $130M at $1B valuation (2026); $150M+ total | - |
| Runloop Devboxes for training and evaluating coding agents | Coding, Agents Infrastructure | San Francisco | 1-10 | Seed, ~$7M | - |
| Scrapybara Virtual desktops for computer-use agents | Computer Use, Agents Infrastructure | San Francisco | 1-10 | Seed, $500K (CRV) | - |
| Steel Open-source browser API for AI agents | Browser, Agents Infrastructure | - | 1-10 | ~$17M (reported) | - |