Concat is a cross-platform video editor built on a native Rust engine and FFmpeg, positioned as a free alternative to CapCut. It runs locally on macOS, Windows, Linux, and Android, handling auto-captions via Whisper, background removal, and 4K export entirely on your machine without cloud uploads or accounts. It also exposes a JSON-RPC, gRPC, and MCP API for programmatic editing.
It is worth a look if you want a timeline editor that does not require a subscription or telemetry, though it is currently in beta and still has rough edges. Because it relies on local models and GPU compositing, resource usage depends heavily on your hardware, and it lacks the extensive stock asset libraries found in commercial tools.
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