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CSipSimple vs Viber

Professional comparison and analysis to help you choose the right software solution for your needs.

CSipSimple icon
CSipSimple
Viber icon
Viber

CSipSimple vs Viber: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature CSipSimple Viber
Sugggest Score — —
Category Social & Communications Social & Communications
Pricing Open Source —

Product Overview

CSipSimple
CSipSimple

Description: CSipSimple is an open source SIP client for Android that allows you to make VoIP calls over Wi-Fi or mobile data. It supports common SIP features like call transfer, call forwarding, call waiting, 3-way conferencing, etc.

Type: software

Pricing: Open Source

Viber
Viber

Description: Viber is a free messaging and calling app for smartphones. It uses your phone number to connect you with people in your contacts and allows free calls, texts, photos and video messages over WiFi.

Type: software

Key Features Comparison

CSipSimple
CSipSimple Features
  • VoIP calling over Wi-Fi or mobile data
  • Support for common SIP features like call transfer, call forwarding, call waiting, 3-way conferencing
  • Video calling support
  • Call recording
  • Encryption using SRTP and ZRTP
  • NAT traversal using STUN, TURN, ICE
  • Voicemail support using SIP MESSAGE
  • Caller ID support
  • Contacts integration
  • Call history
  • Auto answer
Viber
Viber Features
  • Free calls
  • Free messages
  • Group chats
  • Stickers
  • Photo and video sharing
  • Voice messages
  • Location sharing

Pros & Cons Analysis

CSipSimple
CSipSimple
Pros
  • Free and open source
  • Full SIP protocol support
  • Good call quality
  • Lots of features
  • Active development community
Cons
  • Setup can be complex for less technical users
  • Missing some features of proprietary apps like visual voicemail
  • Some stability issues reported
  • No native iOS app
Viber
Viber
Pros
  • Free calls and messages
  • Works across platforms
  • Good call quality
  • Fun stickers and emojis
  • Group chats
Cons
  • Contacts need to be using Viber too
  • Some features are paid only
  • No cloud sync between devices
  • Limited customization options

Pricing Comparison

CSipSimple
CSipSimple
  • Open Source
Viber
Viber
  • Not listed

Related Comparisons

Learn More About Each Product

CSipSimple
CSipSimple
Reviews, pricing & alternatives →
Viber
Viber
Reviews, pricing & alternatives →

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