In 1995, Vlad Shmunis had an appointment with Hewlett-Packard in Boston and a rather awkward item on his preparation list: make the software work. His team had built a PC answering machine. The demonstration was approaching. The answering machine was declining to answer. Shmunis and his chief engineer stayed awake until they found the bug at five in the morning. The application ran. HP signed a distribution contract for a computer model in France. A business found its opening, several hours after its founders would probably have preferred.
Shmunis recalled the episode years later with the matter-of-fact delivery of someone describing a troublesome appliance. There is something appealingly unceremonious about his account. The company that preceded RingCentral did not begin with a polished theory of the future. It began with engineers, contracts, unfamiliar technology and the need to get paid. The grander interpretation could wait until the program stopped misbehaving.
Today he is RingCentral’s founder, chairman and chief executive, still working on business communications more than a quarter-century after starting the company with Vlad Vendrow in 1999. Across that career, an interesting pattern emerges. He will put an unfinished idea in front of customers. He will also interrupt a major corporate milestone when the underlying system needs repair. His willingness to move has always had a companion: the willingness to stop.
A California education, with parental supervision
Shmunis was born in Odesa, in what is now Ukraine, and moved to the Bay Area with his family as a teenager. His father was a mechanical engineer; his mother was an electrical engineer. In his account, arriving meant confronting a new language and building a social world from scratch. A strong grounding in mathematics and science helped. So did the discovery that he could manage more than he had previously imagined.
He finished high school at sixteen and attended San Francisco State University. The choice had a domestic explanation: his parents were reluctant to have him travel across the bridge to Berkeley. A computer class made an impression, and computer science became his subject. He earned undergraduate and master’s degrees, graduating magna cum laude at the undergraduate level. His route into Silicon Valley then involved driving around looking for work. A window advertising for programmers led him to Corporate Data Sciences.
Engineering suited him, although his assessment of his own gifts was refreshingly unsentimental. He thought other people were better programmers. Organizing projects and working with people came more naturally, so management followed. Eventually he was directing software work and studying toward an MBA at Berkeley. Then he left the course unfinished. At thirty, he felt he had waited long enough to start something himself. The urgency of that age is easier to appreciate at thirty than at sixty.
The instructor had a book
His first move toward independence involved taking a step backward through the hierarchy. He returned to programming and contract work. Windows was becoming an opportunity, and a team needed someone to teach it. Shmunis was learning it too. His solution was to read a chapter, then teach the material the following day. It was continuing education with an unusually unforgiving timetable.
The consulting business hired engineers and developed expertise in connecting devices to Windows. Communications and digital video offered useful work. That led to products, including the answering-machine application that survived its overnight repair before the HP meeting. Ring Zero Systems, founded in 1992, ultimately distributed desktop communications software through computer manufacturers. IBM, HP, Sony and Toshiba were among its partners. More than 25 million copies shipped. The distribution was substantial; the control over distribution was another matter.
Manufacturers decided what software would accompany their machines. Shmunis could build a product and negotiate a deal, yet still depend on somebody else’s production schedule and priorities. A signature did not instantly become a shipment, and a shipment did not instantly become cash. That distinction is less glamorous than invention. For a company paying salaries, it can be rather more pressing.
A sale, a buyback, a different bargain
Falling PC prices made him question the economics of bundled software. If a manufacturer was squeezing the price of an entire computer, the few dollars available for an application could hardly feel secure. Motorola bought Ring Zero in 1998. The transaction gave him an exit, but it also sharpened his view of what he wanted from another company: a closer connection to the people actually using the product.
There was a curious encore. In 1999, following changes at Motorola, he was offered the opportunity to buy the business back at a fraction of the earlier price. He accepted. Some OEM work continued, but the internet offered a different route. Instead of waiting for a handful of large manufacturers to pay, he could reach many small businesses and charge them regularly. The telephone, long associated with equipment and installation, could become a service.
This is the commercial thread connecting the two companies. The technical problem remained communications. The relationship around it changed. A monthly customer could choose the service, use it and renew it. That brought its own obligations, but it reduced the distance between the engineer’s decisions and the buyer’s response. RingCentral would have to earn that relationship repeatedly.
Ring Zero → PC manufacturer → user
RingCentral → subscribing business
Three hundred customers, then twenty thousand
RingCentral’s early customer base was modest. Shmunis recalled roughly 300 customers in 2003, after the product shipped late in 2002. By its first venture round in 2006, the number had reached 20,000. The initial operation was economical: about ten people working from a thousand-square-foot office. Advertising through Google and recommendations from customers helped the business grow. The subscription averaged about $25 a month in his early account.
It is easy to read those numbers backward and see an inevitable company. At the time, each additional customer was a small transaction. The attraction was accumulation: recurring payments, a growing base and software that could give a small operation a more professional telephone presence. An automated directory or music on hold could help a very small business sound organized before it had acquired the staff, space or budget usually associated with such polish.
Outside capital changed the range of choices. Sequoia Capital and Khosla Ventures backed the company, with Doug Leone and David Weiden becoming important figures in its development. Later investment included Scale Venture Partners in 2011. Money supplied room to hire and experiment. Recognition from established investors also made recruitment easier. For a founder accustomed to watching cash closely, that additional margin for error was part of what the funding purchased.
The bell could wait
One of Shmunis’s more revealing decisions came before RingCentral reached the stock exchange. He later recalled pulling back from an intended public offering around 2011 because the product had stability problems. New features were put aside while the team worked on architecture and repairs. A founder who had once pushed a service into customers’ hands was prepared to delay a financial event until the engineering was ready.
The distinction matters in communications. A customer may forgive an awkward setting or a missing convenience. A failed call interrupts the work the software exists to support. Reliability is therefore a product decision with financial consequences. It affects what customers can entrust to the service, how large those customers can become and whether other communications providers will put their own relationships behind it.
On September 27, 2013, Shmunis joined employees and fellow executives to ring the New York Stock Exchange opening bell. RingCentral began trading as RNG. The ceremony supplied the photograph every public company wants. The earlier pause supplies the more useful detail about the person. He had been prepared to postpone the picture.
“We sell you a business identity.”
Vlad Shmunis, describing the early service in 2009
A short change of chair
In August 2023, Shmunis became executive chairman as Tarek Robbiati took the chief executive role. He described the change as a chance to spend more time on technology and products. By December, he was back as CEO. The board said product vision and operations needed to sit under one leader. The company said Robbiati’s departure did not result from a disagreement over its operations, policies or practices.
The episode resists the neat retirement narrative. Shmunis remained involved, then resumed responsibility for the whole business. His subsequent agenda has centered on artificial intelligence across communications: contact centers, analysis of conversations and tools that assist or handle interactions. The ambition follows an old area of interest through another technical change. The telephone remains in the story; the work surrounding a call is becoming a larger part of the product.
In a February 2026 conversation with Rob Scott, he argued that AI could increase the usefulness of voice. His current vision includes AI agents, assistance during conversations and the ability to turn spoken interactions into information a business can use. RingCentral’s July 2026 results put a number beside that effort: customers using at least one paid native AI product represented about 13% of annual recurring revenue. That measures the revenue associated with those customers, rather than AI revenue alone.
The typing class stays with him
Away from the executive timetable, another form of preparation has remained close to Shmunis. As a newly arrived teenager, he attended a typing class for Russian-speaking young people through Jewish Family and Children’s Services. Decades later, he still regarded typing as a useful business skill. It is a pleasingly practical souvenir from an otherwise dramatic change of country.
He and Sana Shmunis established a youth endowment to expand the organization’s summer internships. The paid program lasts six weeks and combines workplace placements with preparation for interviews, resumes and professional life. Their earlier support also extended to its small-business lending program. The connection is straightforward: an organization helped their family settle in America; they now help it give other people a start.
Their interests extend further back in time, too. At Tel Aviv University, the family endowed an anthropology institute devoted to understanding human origins and encouraging international academic cooperation. Their adult daughters, Carolyn and Ellen, participated in that effort. The institute also commemorates Shmunis’s parents. A career spent building the next version has left room for curiosity about what came before.
The early stories retain their charm because the competence is acquired in public. A book becomes tomorrow’s lesson. A late repair becomes a working demonstration. A modest subscription becomes a lasting customer relationship. Shmunis has been through enough versions of the communications business to know that preparation has no tidy finishing line. Somewhere, eventually, a customer must pick up the phone.