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3CX vs Sideline

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

3CX icon
3CX
Sideline icon
Sideline

3CX vs Sideline: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature 3CX Sideline
Sugggest Score — —
Category Business & Commerce Social & Communications
Pricing Open Source Subscription

Product Overview

3CX
3CX

Description: 3CX is an open-source IP PBX software solution that works with popular SIP phone systems. It offers unified communications features like auto attendants, call routing, voicemail, video conferencing, and more.

Type: software

Pricing: Open Source

Sideline
Sideline

Description: Sideline is a phone app that provides users with a second phone number to keep their personal and work calls separate. It has features like call forwarding, voicemail transcripts, blocking contacts and more.

Type: software

Pricing: Subscription

Key Features Comparison

3CX
3CX Features
  • VoIP PBX
  • Auto Attendant
  • Call Recording
  • Call Reporting
  • IVR
  • Voicemail
  • Video Conferencing
  • Instant Messaging
  • Presence
  • CRM Integration
Sideline
Sideline Features
  • Second phone number
  • Call forwarding
  • Voicemail transcripts
  • Blocking contacts
  • Conference calling
  • Call recording
  • Visual voicemail
  • Do not disturb mode

Pros & Cons Analysis

3CX
3CX
Pros
  • Open source
  • Easy to use interface
  • Supports popular SIP phones
  • Has free edition
  • Good value for money
Cons
  • Limited mobile apps
  • Steep learning curve initially
  • Complex pricing structure
  • Requires dedicated hardware/server
Sideline
Sideline
Pros
  • Keeps personal and work calls separate
  • Easy to set up and use
  • Affordable pricing
  • Good call quality
  • Useful features like voicemail transcripts
Cons
  • Mobile app only, no desktop app
  • Number porting can take time
  • Some features require premium plan
  • Limited international calling

Pricing Comparison

3CX
3CX
  • Open Source
Sideline
Sideline
  • Subscription

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Learn More About Each Product

3CX
3CX
Reviews, pricing & alternatives →
Sideline
Sideline
Reviews, pricing & alternatives →

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