Silo is a new, 100% open-source IDE designed for developers managing multiple coding agents and projects simultaneously. Unlike traditional IDEs like VS Code, which focus on a single workspace, Silo allows users to keep numerous project workspaces alive concurrently, with terminals, agents, and layouts intact. This enables instant switching between projects without losing context or interrupting ongoing tasks, significantly boosting productivity.

Key features include instant switching with zero reload, a persistent layout that remembers terminal arrangements, and terminals treated as first-class citizens alongside editors. Silo operates locally, with no cloud sync or telemetry. Its robust extension SDK allows features to be built as optional, shareable extensions. Notably, Silo ships with a Claude Code skill that can generate extensions from plain-English descriptions, requiring no prior SDK knowledge.

Silo is positioned as an alternative for developers who find single-workspace editors limiting when coordinating multiple AI coding agents or working across diverse projects. It is free, open-source (MIT licensed), and available for macOS and Linux, with experimental Windows builds.