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Head-to-head · IP PBX Software

Avaya IP Office vs Mitel MiVoice Business

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Avaya IP Office #2 in IP PBX Software 9.0/10 Pricing on request ✓ 1 of 3 features Visit Avaya
Mitel MiVoice Business #3 in IP PBX Software 8.9/10 Pricing on request ✓ 0 of 3 features Visit Mitel

Avaya IP Office leads on 0 checks, Mitel MiVoice Business on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAvaya IP Office · 9.0/10
  • Most featuresAvaya IP Office · 1 of 3

Avaya IP Office scores higher on our rubric for ip pbx software: 9.0 against 8.9 out of 10; our editors rank them #2 and #3.

Avaya IP Office is the better fit for organizations standardizing on an established on-prem PBX. Mitel MiVoice Business is the better fit for organizations needing flexible Mitel deployment options.

  • Avaya IP Office fits best

    Organizations standardizing on an established on-prem PBX

  • Mitel MiVoice Business fits best

    Organizations needing flexible Mitel deployment options

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 Avaya IP Office 9.0/10 Visit ↗ Mitel MiVoice Business 8.9/10 Visit ↗
At a glance
Editor score 9.0 8.9
Ranking #2 in IP PBX Software #3 in IP PBX Software
Best for Organizations standardizing on an established on-prem PBX Organizations needing flexible Mitel deployment options
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet Not checked yet
Free trial — —
Deployment Self-hosted, Desktop, Mobile Cloud, Self-hosted
Platforms Windows, macOS, iOS, Android Web, Windows, macOS, iOS, Android
Support Tickets, Docs Docs
Integrations 9 integrations 6 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Avaya IP Office 1/3 · Mitel MiVoice Business 0/3
Web management Not checked yet Not checked yet
Call recording ✓ (best) Not checked yet
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
  • 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.
  • Supports on-premises, private-cloud, public-cloud and hybrid deployments
  • Combines advanced call routing, automated attendants and unified messaging
  • Offers desktop and mobile clients with Zoom Workplace integration
Cons
  • 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.
  • Voicemail transcription requires MiCollab Advanced Messaging
  • Chat, video and file sharing are delivered through MiCollab
  • Purchasing requires a sales discussion rather than published prices
Our verdict

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 →

Mitel MiVoice Business brings IP telephony and unified communications together for organizations ranging from small offices to global enterprises. Its scope includes business calling, messaging, automated attendants, voicemail, mobility…

Read the review →
  1. Avaya IP OfficeIP PBX Software 9.0Pricing on request
  2. Mitel MiVoice BusinessIP PBX Software 8.9Pricing on request

Strengths and trade-offs

  • 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.

  • Mitel MiVoice Business — where it wins

    • Supports on-premises, private-cloud, public-cloud and hybrid deployments
    • Combines advanced call routing, automated attendants and unified messaging
    • Offers desktop and mobile clients with Zoom Workplace integration

    Where it doesn't

    • Voicemail transcription requires MiCollab Advanced Messaging
    • Chat, video and file sharing are delivered through MiCollab
    • Purchasing requires a sales discussion rather than published prices
  • 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 →
  • Mitel MiVoice Business8.9/10 · Pricing on request

    A flexible IP PBX with cloud, on-premises and hybrid options, plus collaboration tools.

    Visit MitelFull 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