The Quiet Fix for the Industry Nobody Loves
Dennis Thankachan runs a company built on an unglamorous premise: that buying telecom for a business should not feel like a punishment. As co-founder and chief executive of Lightyear, the New York software firm he started in 2019, he has spent the better part of a decade turning that idea into a platform now used by more than 300 enterprises, from Palo Alto Networks to Five Guys to Teladoc. The pitch is simple even if the plumbing behind it is not. Companies use Lightyear to browse and compare network providers by location and price, collect quotes, manage installations, track renewals, and pay their telecom invoices - all in one place, instead of across a scatter of phone calls, spreadsheets, and account reps.
What makes the company interesting is less the product than the conviction behind it. Thankachan did not stumble into telecom. He arrived there deliberately, having studied the sector closely from the other side of the table.
A thesis built at a hedge fund
Before Lightyear, Thankachan spent his early career in finance. He joined Goldman Sachs as an investment banker after college, then moved to PointState Capital, a macro hedge fund managing roughly $10 billion, where he worked on technology and telecom investments. That seat gave him a rare vantage point. He was paid to understand where money moved in the sector and why, and the more he looked, the more one contradiction stood out.
He experienced the frustration firsthand. Procuring networking technology at the fund meant multiple phone calls and weeks of waiting for something that, in his view, should have taken minutes. The gap between how essential the infrastructure was and how miserable it was to buy struck him as a business, not just an annoyance. "I built a thesis around telecom while working as a public equity investor at a large hedge fund," he has said. He also liked the shape of the market for reasons that had nothing to do with excitement: telecom is noncyclical, he notes, and "doesn't see major spending drawdowns in an economic slowdown."
Leaving finance to build
In late 2019 he teamed up with Ryan Schrack, Lightyear's chief technology officer, and set out to digitize a process that had resisted software for decades. The framing he uses is deliberately mundane. He wants buying enterprise telecom to feel like buying socks on Amazon - browse, compare, click, done. "Lightyear is the first and only software product to digitize and automate this entire life cycle," he has said of the enterprise telecom process.
The instinct to build was not new. Thankachan grew up in an immigrant family from India that prized financial security and a strong work ethic, and he showed an entrepreneurial streak early. As a teenager he sold eBooks about making money from home, imported low-cost video game consoles from Japan to resell to classmates, and produced and sold hip-hop beats to artists. Finance, in that light, looks less like a detour and more like a way to accumulate the capital, credibility, and market knowledge a founder would need before making a real bet.
The mistake he talks about
Founders rarely volunteer their worst calls. Thankachan does. Early on, Lightyear went after small and medium-sized businesses, a decision he has since described plainly as the wrong one. Rather than quietly move on, he rebuilt the company's entire go-to-market motion, pivoting from a product-led growth model toward a proper enterprise sales engine. The willingness to name the error and reverse it - publicly, in interviews - has become part of how he talks about building the company. The strongest signal is not that he avoided the mistake, but how quickly he was prepared to admit it and change course.
That candor extends to how he runs the team. Thankachan has described managing Lightyear "like a professional sports team - and we're not a family," a line that emphasizes accountability and performance over the softer language many startups prefer, while still insisting on mutual respect. Colleagues, for their part, have described the culture as "very dorky," a hint that the performance edge comes wrapped in something unpretentious.
A Series B nobody was chasing
By November 2024, Lightyear had grown into a business other people wanted a piece of. It closed a $31 million Series B led by Altos Ventures, with Ridge Ventures, Zigg Capital, Susa Ventures, and Amplo also participating, bringing total funding to roughly $48.6 million. What is notable is the posture Thankachan brought to it. "We weren't actively running a process to raise capital at the time of our Series B," he said - a claim that fits his broader advice to founders in New York and beyond.
The platform now sits atop a network of more than 1,000 connectivity providers, managing millions of dollars in telecom spend for its customers, with the company projecting a path to cash-flow break-even within its existing runway. The ambition is bigger than a procurement tool. Thankachan is trying to build something closer to an operating system for enterprise telecom - the default place a business goes to buy, deploy, and manage everything from ISP circuits and WAN connectivity to phone systems.
The founder off the clock
For all the talk of trillion-dollar markets, the picture Thankachan paints of himself is grounded. He is a committed New Yorker - "Central Park in the fall," he has said, "makes me grateful to live in NYC every year." It is a small detail, but a telling one for someone whose company is built on the unfashionable belief that the biggest opportunities are often hiding inside the problems everyone else has simply learned to tolerate.
That, in the end, is the throughline. A boring industry. A universal complaint. A founder who studied it long enough to see the business inside the frustration, then spent years building the fix. Lightyear is still writing its story, but its founder has been consistent about the plot: make the miserable part of running a company disappear, one network at a time.