SessionKit
Remote desktop as a library — capture a screen, encode and stream it, and inject the operator's mouse/keyboard back. Clipboard, files and audio ride the same single byte channel you provide. Windows, Linux and macOS each act as both host and viewer.
Developer library · .NET (net8.0 / net9.0)
On-Premise No cloud dependency — pair it with your own server (ServerKit) on closed or internal networks; licenses are verified offline.
Core capabilities
🖥️ Cross-platform screen & input
DXGI/GDI · X11 · CoreGraphics capture and SendInput · XTest · CGEvent injection (mouse, keyboard, Unicode text). All three OSes host and view.
🎞️ Hardware H.264 Premium
JPEG-tile deltas by default (no codec); opt into the OS-native codec (Media Foundation · VA-API · VideoToolbox) — auto-negotiated, cross-OS decodable.
📋 Clipboard · files · audio
Two-way text+image clipboard sync, chunked/hashed file transfer (both directions), system-audio streaming (WASAPI · PulseAudio · CoreAudio).
📶 Adaptive & loss-resilient Premium
Auto-tunes quality/FPS/H.264 bitrate to the link, sequence-numbered loss recovery, and auto-reconnect for resilient sessions.
🖱️ Cursor & multi-monitor Premium
Overlays the hardware cursor on its own channel; enumerate and switch the captured display at runtime.
🔌 Transport-agnostic
It opens no sockets. Runs over any channel — WebSocket, framed TCP, an SSH tunnel, or ConnectKit.
Standard vs Premium
🧩 Standard Free
Screen capture, input, clipboard, both-way file transfer, JPEG-tile video, host→viewer audio, and the control-approval consent gate. Embed straight from NuGet.
🛡️ Premium Licensed
Everything in Standard plus hardware H.264 + dynamic bitrate, adaptive quality, multi-monitor, two-way audio + jitter buffer, auto-reconnect, and cursor overlay. Unlocked at runtime with a license key.
Pricing (per developer seat)
| Plan | Developers | Premium (annual) |
|---|---|---|
| Standard | Unlimited | Free |
| Indie | 1 | ~$290 |
| Team | 5 | ~$990 |
| Business | 25 | ~$2,900 |
| OEM / Enterprise | Unlimited · redistribution | Contact us |
Annual, USD, excl. tax. A perpetual option (3× the annual price + 20%/yr maintenance) is also available. Details on the pricing page.