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Head-to-head · IP PBX Software

3CX vs Avaya IP Office

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score 3CX #1 in IP PBX Software 9.2/10 Free plan Free plan✓ 0 of 3 features Visit 3CX
Avaya IP Office #2 in IP PBX Software 9.0/10 Pricing on request ✓ 1 of 3 features Visit Avaya

3CX leads on 0 checks, Avaya IP Office on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest score3CX · 9.2/10
  • Free planonly 3CX
  • Most featuresAvaya IP Office · 1 of 3

3CX scores higher on our rubric for ip pbx software: 9.2 against 9.0 out of 10; our editors rank them #1 and #2.

3CX is the better fit for teams seeking a flexible PBX with a free tier. Avaya IP Office is the better fit for organizations standardizing on an established on-prem PBX.

  • 3CX fits best

    Teams seeking a flexible PBX with a free tier

  • Avaya IP Office fits best

    Organizations standardizing on an established on-prem PBX

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature 3CX 9.2/10 Visit ↗ Avaya IP Office 9.0/10 Visit ↗
At a glance
Editor score 9.2 9.0
Ranking #1 in IP PBX Software #2 in IP PBX Software
Best for Teams seeking a flexible PBX with a free tier Organizations standardizing on an established on-prem PBX
Pricing model Free plan + paid Paid
Starting price $300/yr Pricing on request
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Cloud, Self-hosted, Desktop, Mobile Self-hosted, Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Windows, macOS, iOS, Android
Support Community, Docs Tickets, Docs
Integrations 10 integrations 9 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features 3CX 0/3 · Avaya IP Office 1/3
Web management Not checked yet Not checked yet
Call recording Not checked yet ✓ (best)
High availability Not checked yet Not checked yet
Specs
Concurrent call limit Not checked yet Not checked yet
Deployment options Not checked yet Not checked yet
Supported platforms Not checked yet Not checked yet
Our review
Pros
  • Free plan includes core telephony for up to 10 users and 4 simultaneous calls
  • Visual call flows, multi-level auto-attendants, queues, and voicemail transcription
  • Cloud or self-hosted deployment with web, desktop, and mobile clients
  • Combines TDM and IP telephony with trunk support.
  • Includes auto attendants, call routing, recording, and conferencing.
  • Workplace Client supports desktop and mobile calling, messaging, and presence.
Cons
  • Free plan is limited to 10 users and 4 simultaneous calls
  • Basic costs $300 per system per year and supports 8 simultaneous calls
  • Support channels listed are community and documentation
  • Purchasing is routed through sales or partners rather than public pricing.
  • Instant messaging requires one-X Portal or Avaya cloud services.
  • Features vary by edition, deployment, license, and territory.
Our verdict

3CX centers business communications on an IP phone system for small businesses, mid-market teams, enterprises, and contact centers. It combines calling with call routing, queues, recording, voicemail transcription, messaging, video…

Read the review →

Avaya IP Office brings on-premises unified communications and telephony together for small, medium-sized, and larger organizations. Its hybrid PBX supports both TDM and IP telephony, while voicemail, call management, conferencing,…

Read the review →
  1. 3CXIP PBX Software 9.2Free plan
  2. Avaya IP OfficeIP PBX Software 9.0Pricing on request

Strengths and trade-offs

  • 3CX — where it wins

    • Free plan includes core telephony for up to 10 users and 4 simultaneous calls
    • Visual call flows, multi-level auto-attendants, queues, and voicemail transcription
    • Cloud or self-hosted deployment with web, desktop, and mobile clients

    Where it doesn't

    • Free plan is limited to 10 users and 4 simultaneous calls
    • Basic costs $300 per system per year and supports 8 simultaneous calls
    • Support channels listed are community and documentation

  • Avaya IP Office — where it wins

    • Combines TDM and IP telephony with trunk support.
    • Includes auto attendants, call routing, recording, and conferencing.
    • Workplace Client supports desktop and mobile calling, messaging, and presence.

    Where it doesn't

    • Purchasing is routed through sales or partners rather than public pricing.
    • Instant messaging requires one-X Portal or Avaya cloud services.
    • Features vary by edition, deployment, license, and territory.
  • 3CX9.2/10 · Free plan

    A flexible IP PBX with a free entry tier and advanced call-flow tools.

    Visit 3CXFull verdict →
  • Avaya IP Office9.0/10 · Pricing on request

    A hybrid on-prem PBX with broad calling and collaboration features for Avaya-oriented organizations.

    Visit AvayaFull verdict →

More comparisons

All IP PBX software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update