Runtime

What it does

Runtime provides sandboxed coding agents that can be used by anyone on a team, not just engineers. Each agent operates in a pre-warmed, isolated environment with company-specific context, integrations, and guardrails. Agents can be tagged in Slack, Linear, GitHub, or other tools to perform tasks like investigating alerts, shipping PRs, drafting replies, or posting findings. The platform includes a Mission Control dashboard for monitoring sessions, costs, and agent activity in real time.

Who it is for

Runtime is designed for companies that want to extend coding agent capabilities beyond engineering. Platform teams use it to safely roll out agents, while product, design, marketing, support, finance, and people teams can each have their own sandboxed agent. The website lists dedicated pages for Engineering, Product, Design, Marketing, Support, Finance, People, and Forward-Deployed teams.

Why it matters

Runtime aims to reduce the infrastructure work teams would otherwise need to build from scratch—estimated at 9 months—to deploy coding agents safely. It provides built-in sandboxes, orchestration, guardrails, observability, and integrations. Agents never touch raw production data; they work against sandboxes with PII redaction and row-level scopes. Production writes happen only through reviewed actions or pull requests.

Launch signal

Runtime is part of Y Combinator's P26 batch. The company launched on Hacker News with the title "Launch HN: Runtime (YC P26) – Sandboxed coding agents for everyone on a team." The website offers a free tier and a demo meeting via Cal.com.

Brand and naming

The name "Runtime" suggests the execution environment where code runs, aligning with the product's focus on sandboxed agent execution. The tagline "Sandboxed coding agents for everyone on a team" clearly positions it as a tool for cross-team collaboration. The brand emphasizes safety, control, and ease of use, with a dark-themed website and a clean, professional design.