OpenThunder Desktop

OpenThunder Desktop is the free desktop app for macOS, Windows, and Linux. It bundles the local engine and the CLI in one download, so everything , understanding, analysis, and verification , runs on your machine. No account is required.

Install

Download it from openthunder.dev and open it like any desktop app. One file; nothing to configure to start.

What it gives you

• Build and verify in one place , open any project folder and OpenThunder maps it locally; run scans, missions, and change verification with a live Evidence panel behind every verdict.
• The Lenses , Architecture, Security (including AI security), and Code Health, all keyless.
• An intelligent terminal , run commands in a real terminal that understands the repo around them.
• Agent integration , install the MCP server into Claude Code / Cursor / Codex, and generate AI Context Packs, from the app.

Local-first by default

The app runs a loopback-only local server; your source stays on your machine unless you explicitly opt into the Cloud, a third-party AI provider, or an export. See the Trust Center and Privacy FAQ.

Related

• Getting started , first value in under 5 minutes.
• OpenThunder Cloud , the optional team control plane.