Twill.ai - Turn tasks into pull requests with cloud agents

What it does

Twill.ai is a Y Combinator S25 startup that transforms tasks from GitHub, Slack, and Linear into pull requests. It spins up isolated cloud environments—each with your full stack cloned, dependencies installed, and services running—and lets agents like Claude Code, Codex, or OpenCode work on the task. The result is a PR with proof of work attached.

Who it is for

Twill is built for engineering teams that want to automate routine development work. It targets teams using GitHub, Slack, Linear, and other tools like Notion, Sentry, Google Cloud, AWS, and Datadog. The product is especially relevant for teams with recurring tasks such as error triage, dependency updates, flaky test remediation, and sprint automation.

Why it matters

Twill reduces the overhead of setting up development environments and context-switching. By providing a ready, isolated environment for each task, agents can start coding immediately. It supports multi-repo reasoning across frontend, backend, workers, infra, and shared packages. Teams can also choose different models for different tasks—frontier models for hard problems, open-source models for routine work—keeping costs low.

Launch signal

Twill launched on Hacker News as a YC S25 startup. The website prominently features Y Combinator backing and offers a free Pro subscription for open-source projects. The product is available via web app, desktop app, and CLI, with no credit card required to start.

Brand and naming

The name "Twill" suggests a woven fabric, implying integration and seamless connection between tools and tasks. The tagline "Delegate to cloud agents, get back PRs" clearly communicates the core value proposition. The brand positions itself as a "software factory" that automates engineering workflows, appealing to teams looking to increase productivity.