The Mitel RingCentral Bankruptcy Connection — And Why Avaya Makes It a Pattern

RingCentral has a type. Legacy on-premise phone vendors with tens of millions of installed users, a cloud strategy that isn’t working, and a pressing need for someone to hand them a check and a plan.

RingCentral shows up, writes that check, announces a “transformative exclusive partnership,” and everyone shakes hands in front of a press release.

What happens next is where the story gets interesting.

Between 2019 and 2021, RingCentral inked three of these blockbuster exclusive deals — with Avaya, Mitel, and Atos/Unify — totaling over $1.25 billion in payments, equity investments, and licensing fees.

The press releases described a combined addressable market of over 200 million users. The word “seamless” appeared so many times it lost all meaning.

Analysts called it a masterstroke.

By 2025, two of those three partners had filed for bankruptcy.

One partnership was described under oath in federal court as “plagued with numerous disputes.” RingCentral lost $125 million in equity in one restructuring.

The other partnership dissolved quietly when one partner got acquired by the one currently headed toward bankruptcy court.

And the businesses that had been told to migrate their phone systems to RingCentral through these channels?

They watched the whole thing play out from the sidelines, holding a phone system that was supposed to represent a “clear path to the future.”

This is the story of the Mitel RingCentral bankruptcy connection — and the Avaya chapter that makes it a pattern rather than a coincidence.

Any business evaluating RingCentral as a long-term platform bet should understand both.

The Partnership Playbook: How It Always Starts

Before getting into the wreckage, it’s worth understanding why RingCentral built this strategy in the first place, because it genuinely made sense on paper.

The UCaaS market of 2019–2021 was full of legacy on-premise vendors — companies like Avaya, Mitel, and Siemens’ Unify division — sitting on enormous installed customer bases and absolutely no credible path to the cloud.

Their customers hadn’t left yet, mostly because switching phone systems is about as fun as reorganizing the server closet during a thunderstorm.

But those customers were eventually going to move, and the vendors knew it.

RingCentral’s pitch was elegant: instead of those vendors spending years and hundreds of millions building their own UCaaS platforms (which, to be fair, most of them had already tried and failed at), why not just white-label RingCentral?

The legacy vendor gets a cloud story to tell. RingCentral gets access to millions of captive customers. The press release writes itself.

The formula was consistent. RingCentral would pay a large upfront sum — ostensibly as prepaid commissions and licensing fees — the legacy vendor would make RingCentral its exclusive UCaaS partner, and the two companies would jointly “develop programs” to migrate customers.

The word “seamless” would be deployed liberally. Everyone would go home happy.

That was the playbook. The execution is where things got complicated.

The Mitel RingCentral Bankruptcy: “Plagued With Numerous Disputes”

In November 2021, RingCentral and Mitel announced what was described, without apparent irony, as a partnership that would reshape the future of business communications.

RingCentral paid $650 million to acquire Mitel’s CloudLink technology — the platform that was supposed to make migrating Mitel’s 35 million on-premise users to RingCentral seamless.

Mitel’s investor group put $200 million into RingCentral equity to demonstrate confidence. Press releases were distributed. The word “transformative” appeared multiple times.

The ink was barely dry before things started going sideways.

Migrations were “slower than projected” in the very first quarter of 2022 — which means within months of launch, the core deliverable was already underperforming.

As 2022 progressed and migrations picked up slightly, a new problem emerged: RingCentral allegedly wasn’t paying Mitel the incremental migration payments it owed.

By the end of Q4 2022, the partnership was, according to Mitel’s own CFO Janine Yetter in sworn bankruptcy court testimony, “plagued with numerous disputes related to the incremental migration payments and other payments due from RingCentral.”

Let that land for a second. In federal bankruptcy court. Under oath. “Plagued.”

RingCentral and Mitel formed two separate settlement agreements — in January and June of 2023 — to try to resolve the disputes and patch up the relationship.

Neither worked. The partnership “did not meaningfully improve” after the settlements, Yetter testified.

Mitel then acquired Unify from Atos in 2023, bringing a whole new batch of European customers into the picture — and a whole new set of complications for the RingCentral relationship.

By mid-2024, the partnership was over. Mitel sold its entire cloud customer base — the MiCloud Connect customers, the Sky UCaaS platform, everything — to RingCentral for approximately $30 million.

For context: RingCentral had paid $650 million for the technology that was supposed to migrate those customers.

The customer relationships generated by that technology sold three years later for $30 million. That is a 95% decline in value over 36 months, which is an achievement of sorts, just not the kind anyone was hoping for.

Mitel pivoted immediately to Zoom as its new exclusive UCaaS partner — its second exclusive partner in three years — and filed Chapter 11 bankruptcy in March 2025 with $1.15 billion in debt.

Zoom, for what it’s worth, appeared unfazed by this development.

Case Study: Avaya — $125 Million, Gone

If the Mitel story is a slow-motion collapse, the Avaya story is more of a controlled demolition that somehow turned into an uncontrolled one.

RingCentral and Avaya announced their partnership in October 2019, launching Avaya Cloud Office by RingCentral (ACO).

The financial terms were substantial: RingCentral prepaid Avaya $375 million — primarily in RingCentral stock — as an advance on future commissions.

On top of that, RingCentral bought $125 million in Avaya preferred equity, taking approximately a 6% stake in the company. Total investment: $500 million. Total confidence expressed publicly: enormous.

Avaya, for its part, used a chunk of that money to buy back $500 million of its own stock and pay down $250 million in debt.

Which, in retrospect, is the kind of financial decision that only makes complete sense if you’re very confident the core business is about to turn around. Spoiler: it wasn’t.

By November 2022 — three years after the partnership launched — Bloomberg Law reported that RingCentral had quietly engaged outside advisers to negotiate with Avaya over “more than $300 million in contract liabilities.”

The discussions were private but adversarial enough to require outside counsel on both sides.

The substance of the dispute: Avaya wasn’t delivering the seat migrations that RingCentral had prepaid $375 million to receive. The checks had cleared. The migrations hadn’t.

It’s the UCaaS equivalent of paying a contractor $375 million to renovate a building and showing up three years later to find they’ve installed two new light switches and a really nice doormat.

In February 2023, Avaya filed for Chapter 11 bankruptcy — its second time in six years, a feat Wall Street analysts affectionately dubbed a “Chapter 22.”

The restructuring deal included a renegotiated RingCentral partnership. The terms of that renegotiation told the whole story: RingCentral’s $125 million preferred equity stake in Avaya was eliminated entirely.

Wiped to zero. In exchange, RingCentral got a renegotiated partnership structure where Avaya could now sell ACO directly to its installed base rather than just acting as an agent, and Avaya would be compensated in cash per seat sold going forward.

So to summarize: RingCentral put $500 million into this partnership, faced $300 million+ in disputed payments, watched its equity stake vaporized in bankruptcy court, and walked away with a restructured deal that looks meaningfully different from the one it paid half a billion dollars for.

The partnership has continued — and even expanded in 2024, with deeper integration between ACO and Avaya Aura for enterprise customers.

That’s genuinely good news for Avaya customers who stayed the course. But the road to get there involved a $125 million write-off, a near-legal standoff, and a partner that had filed for bankruptcy twice in the span of a working relationship.

Not exactly the “seamless cloud migration path” that was promised in 2019.

Case Study: Atos/Unify — The Quiet Dissolution

The Atos/Unify story is less dramatic but no less instructive. In July 2020, Atos expanded its partnership with RingCentral to launch Unify Office by RingCentral — an exclusive co-branded UCaaS product for the 40 million users in the Atos Unify installed base. Another exclusive partnership. Another tens of millions of promised converts.

Atos was in its own financial difficulties — the French IT giant had been struggling for years with declining revenues and a complex restructuring.

In 2023, Mitel acquired Unify from Atos, inheriting the RingCentral partnership along with the customer base. The 2024 transaction that ended the Mitel-RingCentral partnership also terminated Unify’s partnership with RingCentral — and per the bankruptcy filings, “settled any claims and remaining amounts due.”

That last phrase is doing a lot of quiet work. “Settled any claims and remaining amounts due” is the legal equivalent of saying two parties had a dispute about money and agreed to stop arguing about it. It doesn’t imply a lawsuit, but it certainly implies the relationship hadn’t been operating smoothly enough to close without a settlement clause.

Atos/Unify: launched 2020, exclusive, 40 million promised users, dissolved 2024, no fanfare. Just a line item in a bankruptcy filing that said the claims had been settled.

RingCentral’s Partnership History: So What’s the Pattern Here?

Three exclusive partnerships. Over $1.25 billion invested. Two partners in bankruptcy court. One dissolved quietly with settlement language.

And a combined track record that suggests “exclusive UCaaS partnership with RingCentral” is a designation that ages about as well as leftover sushi at a telecom conference.

The pattern isn’t hard to see in hindsight:

RingCentral paid large upfront sums to legacy vendors who needed cash — cash that often went straight to debt reduction and stock buybacks rather than the cloud migration programs that were supposed to justify the payments.

The vendors got their money. The migrations didn’t materialize at the volumes promised. Disputes followed. Lawyers got involved. Restructurings happened. Customers got caught in the middle.

The vendors in these deals weren’t bad actors — they were companies in genuine financial distress, using the RingCentral partnership as a lifeline.

But a lifeline and a cloud migration strategy are not the same thing. And the customers who were told “migrate to RingCentral through your existing vendor” were essentially betting their phone system on the vendor’s ability to execute a transition they’d been struggling with for years.

The businesses that got through these partnerships intact were the ones who migrated early and completely — who treated the migration as an urgent project rather than a someday conversation.

The ones who waited, reasonably trusting that a billion-dollar exclusive partnership would be stable, found themselves watching press releases about bankruptcy filings and partnership dissolutions while their phone system sat in an increasingly ambiguous state.

What RingCentral’s Partnership History Means if RingCentral Is on the Shortlist

None of this means RingCentral is a bad product. It’s a legitimate UCaaS platform with real enterprise capabilities, and for businesses buying it directly — not through a legacy vendor channel — these partnership implosions are largely a background story.

But the partnership history matters for a specific type of buyer: the business that’s currently on Mitel, Avaya, or Unify hardware and has been pointed toward RingCentral as the obvious migration path. That business should ask a few questions before signing.

Who actually owns the customer relationship? With ACO, for a long time, the answer was RingCentral — not Avaya. Avaya was the agent. If Avaya had collapsed entirely rather than restructuring, those ACO customers would have been dealing directly with RingCentral for support, billing, and everything else, with no Avaya intermediary. That’s a very different relationship than what the sales pitch implied.

What happens to pricing and terms when the partnership structure changes? The 2023 Avaya restructuring renegotiated the partnership terms entirely.

Businesses on ACO saw their vendor’s relationship with the platform fundamentally change. The product kept working — but the commercial relationship underneath it changed without their input.

What’s the actual support experience? When both Avaya and Mitel were in financial distress, their ability to invest in support resources, migrations, and product development was constrained.

That has a direct impact on customers trying to get issues resolved or transitions completed.

These aren’t gotcha questions. They’re the questions any business should ask about any platform where the underlying partnership structure is this complex. The UCaaS Vendor Evaluation Checklist covers exactly these scenarios — including what to ask about vendor financial stability, support escalation paths, and what happens to the customer relationship if the commercial structure changes.

For businesses still navigating the Mitel EOL timeline specifically, Techmode’s complete Mitel product EOL breakdown maps every system’s exact support cutoff date — so the decision gets made with a calendar, not a press release.

The Techmode Difference

Techmode doesn’t build its business around exclusive billion-dollar partnerships with companies heading toward bankruptcy court.

That’s not a dig — it’s just a meaningfully different approach to how a phone system provider should operate.

Every TechmodeGO deployment runs on private, triple-redundant AWS infrastructure that Techmode owns and controls. There’s no legacy vendor in the middle. No partner whose financial difficulties translate into slower migrations, disputed payments, and court testimony about how “plagued” the relationship has become.

The platform’s stability isn’t contingent on a third party’s balance sheet.

The real differentiator is what happens when things need to get done. Techmode’s Premier Launch means every client gets a dedicated project manager and an experienced install team that tests everything before go-live.

White-glove installation, coordinated number ports, call flows tested before day one. Not “we’ll migrate you when our partner relationship stabilizes.”

Then comes Concierge Support — U.S.-based technicians who know the client’s system and have the authority to fix problems, not transfer them to a queue.

When something goes wrong, the answer isn’t a support ticket routed through a distressed vendor’s shrinking support team. It’s a real person who picks up and solves the problem. No offshore call centers. No ticket queue roulette.

That’s why Techmode’s NPS sits at 85. A+ BBB rating. 99.999% uptime. Customers who recommend Techmode not because they’re locked in, but because the service actually works — without requiring a bankruptcy filing to explain why the cloud migration took three years longer than the press release promised.

For a structured way to evaluate any UCaaS vendor — including RingCentral — the UCaaS Vendor Evaluation Guide covers the questions that separate a stable platform from a compelling press release. And if evaluating costs is part of the conversation, Techmode’s hidden fees and taxes quote tool makes sure the number on the contract is the number that actually gets paid.

Frequently Asked Questions

Q: Is RingCentral going out of business?

No — and that’s not what this post argues. RingCentral is a publicly traded company with real revenue and a functional UCaaS platform. The concern isn’t RingCentral’s survival; it’s the instability of the exclusive partnership channels through which many businesses have been sold RingCentral — specifically via Avaya, Mitel, and Atos/Unify. Businesses that bought RingCentral directly, without going through a legacy vendor channel, are largely unaffected by these partnership collapses. Businesses that migrated through Avaya or Mitel channels have had a bumpier ride.

Q: What happened to businesses that migrated to Avaya Cloud Office by RingCentral when Avaya went bankrupt?

The ACO product kept operating — the 2023 restructuring renegotiated the partnership terms rather than terminating it. Businesses on ACO continued to have a functional phone system. What changed was the underlying commercial relationship: Avaya went from being a pure agent (with RingCentral owning the customer relationship) to being able to sell ACO directly and maintain its own customer relationships. The product survived. The structure underneath it changed, and not all customers were fully briefed on what that meant for their billing, support, and contract terms going forward.

Q: Did RingCentral sue Avaya or Mitel?

Not publicly, in either case. With Avaya, Bloomberg Law reported that RingCentral engaged outside advisers for negotiations over $300 million+ in disputed contract liabilities in late 2022 — adversarial enough to require counsel, but resolved through the bankruptcy restructuring rather than litigation. With Mitel, the disputes were settled via two agreements in 2023, then the entire partnership was terminated and settled via the 2024 asset sale. Mitel’s CFO described the partnership as “plagued with numerous disputes” in bankruptcy court testimony, but the resolution was commercial rather than litigated.

Q: How does Techmode avoid the partner instability problem?

Techmode operates TechmodeGO on its own private AWS infrastructure and sells directly to end customers — there’s no legacy vendor intermediary whose financial health affects the platform’s stability or the customer relationship. When a Techmode customer calls support, they’re talking to Techmode. When a migration needs to happen, Techmode’s own project managers and install team execute it. The stability of the service isn’t contingent on a third party’s ability to navigate a debt restructuring.

Q: Where can businesses read more about the Mitel RingCentral bankruptcy and partnership collapse?

Techmode published a full breakdown of the Mitel-RingCentral collapse — including the court testimony, the financial timeline, and what it means for businesses still on Mitel hardware — at The Mitel-RingCentral Deal Fell Apart. Now What? For a broader look at RingCentral’s partnership history across Avaya, Mitel, and Atos/Unify, this post covers the full pattern. The short version: three exclusive billion-dollar partnerships, two bankruptcy filings, one pattern worth understanding before signing anything.

Q: Should businesses currently on RingCentral switch?

That depends entirely on how the business got onto RingCentral and what their experience has been. Businesses on RingCentral’s direct platform who are happy with the service have no inherent reason to switch based on partnership drama that doesn’t directly affect them. Businesses who migrated through Avaya or Mitel channels and have experienced support degradation, pricing changes, or uncertainty about their contract structure are worth having a conversation. Techmode’s UCaaS Vendor Evaluation Checklist is a good place to start regardless of current provider.