SipLine

SipLine is a modern, lightweight SIP softphone for Windows 10/11 built with .NET 9 WPF. It provides enterprise-grade VoIP communication with a focus on performance, security, and extensibility.

Features

Ultra-Fast: Startup in <0.5s, minimal CPU usage
HD Audio: Opus and G.711 codecs with adaptive jitter buffer
Security: TLS transport, SDES-SRTP encryption, Windows DPAPI credential protection Multi-Account: Up to 5 simultaneous SIP accounts
Plugin SDK: C# SDK for custom integrations (CRM, call recording, automation)
Plugin Marketplace: Community and premium extensions
Headset Support: Jabra, Poly, Sennheiser, Logitech with HID controls
Call Quality: Real-time MOS Score, Jitter, Packet Loss and RTT monitoring
Enterprise: Silent MSI installer, GPO support, JSON centralized config
Compatibility: 3CX, Asterisk, FreePBX, OVH, Twilio, RingCentral, and more

Language packages : https://sipline.feelautom.fr/languages

Features

Ultra-Fast: Startup in <0.5s, minimal CPU usage
HD Audio: Opus and G.711 codecs with adaptive jitter buffer
Security: TLS transport, SDES-SRTP encryption, Windows DPAPI credential protection
Multi-Account: Up to 5 simultaneous SIP accounts
Plugin SDK: C# SDK for custom integrations (CRM, call recording, automation)
Plugin Marketplace: Community and premium extensions
Headset Support: Jabra, Poly, Sennheiser, Logitech with HID controls
Call Quality: Real-time MOS Score, Jitter, Packet Loss and RTT monitoring
Enterprise: Silent MSI installer, GPO support, JSON centralized config
Compatibility: 3CX, Asterisk, FreePBX, OVH, Twilio, RingCentral, and more

Project Samples

Main Dialer - Dark theme with DND mode and DTMF keypad

Contacts Manager - Search and manage your SIP contacts

SMS Messaging Plugin - Send SMS via OVH API integration

Call Recordings - Browse, play, download and share recordings

Settings & Plugin Manager - Configure SIP accounts, audio, codecs and manage plugins

Project Activity

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Additional Project Details

Operating Systems

Windows

Languages

Arabic, Brazilian Portuguese, Chinese (Simplified), Dutch, English, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish, Ukrainian, Vietnamese

Intended Audience

End Users/Desktop, System Administrators, Telecommunications Industry

User Interface

Win32 (MS Windows)

Programming Language

Related Categories

C# VoIP Software, C# SIP Servers, C# Softphones

Registered

2026-03-14

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