CutWire Prism review
A broad, extensible video mixer for technical users who want a free desktop tool.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
CutWire Prism is a free, GPLv3-licensed desktop application for live video mixing and event production. It is aimed at volunteers, streamers, schools, churches, theatres, small venues, and local broadcasters that need to combine cameras, screens, windows, NDI feeds, phone cameras, media files, text, shaders, and overlays. Its node-based media graph connects inputs, processing, layers, A/B selection, and outputs, while the two-deck mixer provides a crossfader, AUTO, CUT, and transition styles.
The published Free plan costs 0 and includes the complete desktop application, with no account, telemetry, or feature tier. That matters for teams seeking an open-source tool without a paid upgrade path. Prism also covers a wide production workflow: users can apply background removal, chroma key, blur, crop, flip, and other effects; process audio with EQ, compression, gates, and reverb; and send the program to a projector, recording, NDI, or virtual webcam output. Lua scripting and GLSL shader support add room for custom workflows.
Its ecosystem fit is practical for live production. Virtual webcam output works with Zoom, Microsoft Teams, OBS, web browsers, and other applications, while NDI, WebSocket, and browser support extend its connection options. Windows and Linux are supported, and macOS is covered with an important constraint: there is no prebuilt binary yet, and virtual camera output is unavailable there. Choose CutWire Prism if you want a free, extensible mixer with broad inputs, compositing, audio routing, and technical customization. A simpler virtual camera tool may be a better choice if your priority is a minimal setup rather than node-based production control.
CutWire Prism pros and cons
- Where it wins
- Free GPLv3 desktop application with no account or telemetry
- Broad inputs, node-based compositing, effects, audio, and scripting
- Virtual webcam, NDI, recording, and cross-platform desktop support
- Where it doesn't
- macOS has no prebuilt binary yet
- Virtual camera output is unavailable on macOS
- The node-based workspace may suit technical users better than beginners
CutWire Prism fact sheet, pricing and score →
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