Best Avaya Alternatives for Cloud Migration in 2026

The Avaya situation, factually

Avaya has restructured twice: a Chapter 11 filing in January 2017, and a second, prepackaged Chapter 11 filed in February 2023 that the company exited on May 1, 2023 with more than 75 percent of its debt eliminated. It is now privately held by its former creditors, appointed Patrick Dennis as CEO in September 2024, and has refocused its strategy on roughly 1,500 of its largest global customers. Two 2025 moves matter most to mid-market readers of this page. First, in February 2025 Avaya notified its cloud contact center customers of a 200-seat monthly minimum effective June 30, 2025, with smaller customers offered the option to cancel without charge, a decision covered by The Register, CX Today, and UC Today. Second, it launched the Avaya Infinity platform in April 2025 as the successor to the Avaya Experience Platform, with cloud, hybrid, and on-premise deployment. On-premise Aura continues to be sold and developed, and end of manufacturer support for Aura 10.1 arrived January 1, 2026. None of this means an Avaya estate stops working. It does mean support attention is concentrating on the largest accounts, and companies below that tier should evaluate their options on their own timeline rather than a forced one.

Before you migrate: what to assess first

Four things determine how hard your migration will be, and none of them appear on a vendor brochure. Integrations: list everything wired into the Avaya estate, including CRM screen pops, call recording, paging, door phones, alarm and elevator lines, fax, and analog endpoints, because undocumented analog devices are the single most common cutover surprise. Contract status: Avaya maintenance agreements auto-renew, with written non-renewal notice required, commonly 30 days before renewal though individual contracts govern, so pull the renewal date before you start evaluating, not after. Complexity: count sites, DIDs, hunt groups, auto attendants, and contact center queues; each one has to be mapped to the new platform before cutover. Adoption: budget real training time, because moving users from desk phones to softphones is consistently reported as the hardest part of these projects. Industry migration guides put phased multi-site moves at 12 to 24 weeks and contact center migrations at 4 to 6 months or more.

The 5 best Avaya alternatives at a glance

The 5 best Avaya alternatives, ranked by use case

1. RingCentral: best like-for-like replacement for Avaya feature depth

Avaya shops tend to use their PBX hard: hunt groups, paging, shared line appearances, receptionist consoles, fax. RingCentral is the cloud platform that reproduces the most of that list with the least compromise, which is one reason Avaya itself has resold it as Avaya Cloud Office under a partnership dating to 2019. Migrations are well-worn territory: site-by-site phasing is standard, and the feature-mapping exercise from Aura or IP Office is shorter than for any other cloud platform here. The cautions are commercial, not technical: SMS surcharges and add-ons routinely push invoices above the quoted seat price, AI features beyond the included assistant cost $25 to $60 per user extra, and its auto-renewal terms have a documented complaint record, so calendar the notice window on whatever you sign.

2. Microsoft Teams Phone: best for Microsoft 365 companies

If your company already runs Microsoft 365, Teams Phone turns the licensing you own into the phone system, which is why Microsoft now carries about 22 percent of global UCaaS seats per Metrigy. Direct Routing and Operator Connect matter specifically for Avaya migrations: you can keep existing SIP trunk contracts and move sites in phases rather than repapering carrier agreements on day one. Plan honestly for the gaps. Analog devices need adapters, Microsoft's own documentation lists call queue and auto attendant limitations that a hard-working Aura estate will notice, and there is no native contact center, so budget for a certified third-party or Dynamics 365 if agents are part of the picture.

3. 8x8 XCaaS: best for consolidating phone system and contact center

The 200-seat minimum Avaya set for its public cloud contact center in 2025 left a large population of sub-200-agent operations shopping, and 8x8 is built for exactly that profile: UCaaS and full omnichannel CCaaS on one platform, one admin console, and a single 99.999 percent SLA covering both. For an Avaya shop running CM plus a modest agent desk, it collapses two migrations into one. Commercial diligence matters here: 8x8 no longer publishes list pricing, its complaint record concentrates on billing and cancellation friction, and the invoice-versus-quote gap shows up repeatedly in reviews, so negotiate the all-in number and the exit terms before signature.

4. Cisco Webex Calling: best for phased migrations and Cisco network estates

Cisco is the second-largest UCaaS provider by seats (15.1 percent of the global market in Metrigy's first-half 2025 data) and took the top spot in Metrigy's 2026 UCaaS MetriRank. For Avaya migrations its distinguishing tool is the Local Gateway: premises-based PSTN connectivity that interconnects with on-premise PBXs, so an Aura estate and Webex Calling can genuinely run in parallel while sites move in waves. If your network is already Cisco switching and security, the operational fit compounds. Webex Contact Center is quote-based, with third-party reported figures spanning roughly $69 to $235 per agent depending on tier, so scope it precisely if agents are in play.

5. Mitel: best for hybrid deployments that keep PBX-style control

Mitel is the closest architectural relative of Avaya on this list: a telephony company selling on-premise, private cloud, and hybrid deployments under its 'hybrid by design' strategy, with MX-ONE explicitly supporting third-party endpoints including Avaya hardware and positioning itself as a consolidation point for legacy platforms. Its 2024 partnership with Zoom layers Zoom Workplace and AI Companion over Mitel telephony for collaboration. State the record plainly, because it belongs in the evaluation: Mitel filed a prepackaged Chapter 11 in March 2025, emerged on June 20, 2025 with about $1.15 billion of debt eliminated, is now owned by its former lenders, and appointed a new CEO in September 2025. That is a fast, completed restructuring with a continuing roadmap, and it is also a 2025 restructuring. Companies leaving Avaya specifically to escape financial-uncertainty risk should weigh Mitel's history exactly the way they weigh Avaya's. Companies whose priority is keeping on-premise control with the least architectural change will still find it the most natural fit here.

What we see in Avaya migration RFPs

The same pitfalls repeat. Analog and specialty lines, fax, paging, door phones, alarms, elevators, get discovered at cutover instead of at inventory, and each one delays a site. Maintenance renewals fire mid-evaluation because nobody calendared the written-notice window, locking in another term of support spend. And big-bang cutovers get proposed by whoever is not carrying the risk; the projects that go smoothly move in waves of 200 to 500 users with the old and new platforms coexisting. On selection: the existing stack decides more deals than features do, and contact center seats decide the economics, since per-agent pricing runs two to five times a UC seat. On negotiation: an Avaya displacement is a deal every vendor on this page wants badly, which is real leverage. Run two or three finalists in a competitive RFP, ask directly for migration incentives, and price the porting and professional services, not just the seats. Post-migration, confirm who owns support before you sign: named account management and SLA credits belong in the contract, because the gap between sales attention and support attention is where these projects sour.

Avaya migration checklist

1. 1.Inventory everything: every site, DID, extension, hunt group, auto attendant, queue, and every analog, fax, paging, alarm, door, and elevator line wired into the estate.
2. 2.Pull your Avaya maintenance contract and calendar the written non-renewal notice date. Do not let it auto-renew mid-evaluation; individual contracts govern the window, commonly 30 days.
3. 3.Export three months of call data: peak concurrency, queue volumes, and after-hours patterns. This sizes the new platform and is leverage in every quote.
4. 4.Shortlist two or three platforms by stack fit and contact center need, then run them as a competitive RFP with migration incentives on the table.
5. 5.Pilot with one site or department first, on a verified network readiness check.
6. 6.Port numbers in waves and run the platforms in parallel. Never cancel Avaya service or maintenance before the ports are confirmed live.
7. 7.Train users on softphones before their site cuts over; adoption is the most commonly reported failure point.
8. 8.Decommission deliberately: end maintenance only after the last site is stable, and archive call recordings and reporting data before access ends.

How ObsidianX runs UCaaS and CCaaS evaluationsOur full 2026 ranking of the major UCaaS platformsLeaving RingCentral instead? The alternatives, rankedOn NEC instead? The support dates and 6 migration pathsFix the network under the new phones: SD-WAN vs MPLSTalk to a consultant about your migration