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Head-to-head · IP PBX Software

Avaya IP Office vs Thirdlane Business Communications Platform

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks 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
Thirdlane Business Communications Platform #6 in IP PBX Software 8.6/10 Pricing on request ✓ 0 of 3 features Visit Thirdlane

Avaya IP Office leads on 0 checks, Thirdlane Business Communications Platform 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 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 8.6 out of 10; our editors rank them #2 and #6.

Avaya IP Office is the better fit for organizations standardizing on an established on-prem PBX. Thirdlane Business Communications Platform is the better fit for MSPs and providers running multi-tenant UC.

  • Avaya IP Office fits best

    Organizations standardizing on an established on-prem PBX

  • Thirdlane Business Communications Platform fits best

    MSPs and providers running multi-tenant UC

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 ↗ Thirdlane Business Communications Platform 8.6/10 Visit ↗
At a glance
Editor score 9.0 8.6
Ranking #2 in IP PBX Software #6 in IP PBX Software
Best for Organizations standardizing on an established on-prem PBX MSPs and providers running multi-tenant UC
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet —
Free trial — —
Deployment Self-hosted, Desktop, Mobile Cloud, Self-hosted, Desktop, Mobile
Platforms Windows, macOS, iOS, Android Web, Windows, macOS, Linux, iOS, Android
Support Tickets, Docs Email, Live chat, Phone, Tickets, Community, Docs · 24/7
Integrations 9 integrations 7,000+ integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Avaya IP Office 1/3 · Thirdlane Business Communications Platform 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.
  • Combines tenant-isolated PBX, routing, queues, and contact-center tools.
  • Offers cloud, self-hosted, dedicated, and white-label deployment options.
  • Connects CRM workflows with APIs, webhooks, and AI call analysis.
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.
  • Quote-based licensing depends on seats or concurrent calls and deployment choices.
  • Contact center, CRM, AI, and messaging are optional modules.
  • No free plan is available.
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 →

Thirdlane Business Communications Platform brings multi-tenant IP PBX, business calling, messaging, meetings, and contact-center capabilities together. It is aimed at MSPs, UCaaS providers, integrators, and enterprise IT teams that need to…

Read the review →
  1. Avaya IP OfficeIP PBX Software 9.0Pricing on request
  2. Thirdlane Business Communications PlatformIP PBX Software 8.6Pricing 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.

  • Thirdlane Business Communications Platform — where it wins

    • Combines tenant-isolated PBX, routing, queues, and contact-center tools.
    • Offers cloud, self-hosted, dedicated, and white-label deployment options.
    • Connects CRM workflows with APIs, webhooks, and AI call analysis.

    Where it doesn't

    • Quote-based licensing depends on seats or concurrent calls and deployment choices.
    • Contact center, CRM, AI, and messaging are optional modules.
    • No free plan is available.
  • 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 →
  • Thirdlane Business Communications Platform8.6/10 · Pricing on request

    A multi-tenant PBX and UC platform with cloud, self-hosted, and white-label options.

    Visit ThirdlaneFull 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