MarketSpark, Inc.

The line still works. Nobody knows why.

In a stairwell somewhere in a Fortune 500 office tower, a fire panel sits bolted to the wall, doing exactly nothing. That is its job. It waits. And the day it has to call for help, it picks up a phone line that, technically, no longer exists - the copper behind it was decommissioned months ago. The call still goes through. That quiet continuity is the entire product MarketSpark sells.

MarketSpark, headquartered in Bannockburn, Illinois, replaces aging analog telephone lines - the industry calls them POTS, "plain old telephone service" - with a managed wireless service. Fire alarms, elevator emergency phones, alarm panels, fax machines, voice lines: the boring, regulated, can't-fail circuits that hold a building together. The company reports it now keeps those lines running for more than 300 enterprises, including 60 of the Fortune 500, across roughly 85,000 locations in the U.S. and Canada.

It is an unusual place to build a company - the obituary of a technology most people assumed was already dead. The dial tone is not glamorous. But somebody has to keep the elevator phone ringing, and increasingly that somebody is a 54-person team in the Chicago suburbs.

Copper is being switched off, on a deadline

For a century the phone line was a public utility you could count on. Then the carriers did the math. Maintaining decaying copper networks for a shrinking number of analog devices is expensive, and regulators have given carriers the green light to retire it. So they are - aggressively. The trouble is that "outdated" copper is still wired to things that are very much not optional: life-safety systems governed by codes like NFPA 72, elevator phones required by law, alarm circuits that insurers demand.

An enterprise running thousands of sites suddenly faces a problem with no good manual answer. Rip-and-replace every analog device? Wildly expensive. Wait and hope? The line goes dead, and now a fire panel is silently non-compliant. The copper is leaving on the carrier's schedule, not the customer's.

This is the central tension of the whole business: a critical line that has to keep working, sitting on top of a network that is actively disappearing. MarketSpark exists in that gap.

Treat the dial tone like software

Founded in 2017 by Jake Jacoby and Rob Engstrom, MarketSpark made a contrarian wager. The obvious framing was hardware: sell a box that swaps copper for cellular and walk away. The founders bet that the box was the easy part and the wrong part to sell. What enterprises actually needed was a service - someone to own the line end to end, monitor it, and prove it was working at any hour across tens of thousands of sites.

So they wrapped carrier-agnostic wireless hardware in a cloud platform and sold the whole thing as a managed subscription. The analog device on the wall never changes. Behind it, a 4G LTE or 5G-ready router carries the signal, a SIM that can ride whichever carrier has the best coverage, and a dashboard that watches the line so a human does not have to.

Jeff Gower took the CEO seat to scale it. The bet held: by the time the company raised its Series B it was already serving 35 Fortune 500 companies, a number that has since climbed to a reported 60.

What's actually in the box

MarketSpark's offering has three moving parts that you, ideally, never see. The hardware - the M-Series, UL- and FCC-approved, 5G-ready, with fail-safe redundancy - sits between the legacy device and the cellular network. The connectivity is carrier-agnostic, so a site is not married to whichever carrier happens to be weakest in that ZIP code. And the Command Center platform turns the whole thing into something an IT team can actually manage: real-time line monitoring, proactive alerts, remote diagnostics, multi-location oversight from one dashboard.

The old POTS line failed silently. It could be dead for months before anyone discovered it during an inspection, or worse, an emergency. MarketSpark's version pages a human the moment a line drops. That is the upgrade hiding inside an apparently lateral swap: visibility on a circuit that used to be a black box.

The receipts: money, math, and Fortune 500s

In April 2021 MarketSpark closed a $7 million Series B led by IDT Corporation, with participation from Goldie Group and Klein Enterprises. IDT's CEO Shmuel Jonas and Klein Enterprises' CEO Daniel Klein joined the board - investors with telecom operating experience, not just check-writers. The capital went toward sales, marketing and platform development.

But the most persuasive proof is the pricing. A traditional POTS line runs an enterprise roughly $75 to $150 per line, per month, and those rates climb as carriers wind down the service. MarketSpark's managed wireless equivalent lands around $45 to $55. Multiply across thousands of lines and the spreadsheet makes the decision before the engineers do.

Then there's reach. Carrier partnerships and a carrier-agnostic SIM strategy let MarketSpark light up sites whether they sit downtown or at the dead end of a rural distribution route. A 99% project success rate across thousands of installs is the kind of number that wins the second contract, then the tenth.

Make a generational migration invisible

MarketSpark frames its purpose as future-proofing the enterprise: turning a forced, painful copper-to-wireless migration into something a customer barely notices. The mission is not to sell the most exciting technology in the room. It is to make sure the least exciting line in the building - the one a regulator cares about and nobody else thinks about - keeps doing its job through a once-in-a-generation network transition.

There is a quiet ambition in that. Anyone can sell the upgrade people want. MarketSpark sells the one they didn't know they needed until a carrier sent a decommissioning notice. The company's job is to absorb the chaos of that transition and hand the customer back a dial tone that simply works.

The copper isn't coming back

The decommissioning of POTS is not a temporary disruption to wait out. It is a one-way door, and the country is walking through it building by building. Every retail chain, hospital, bank, factory and government office with analog lines on the wall will eventually face the same notice. The market MarketSpark is in is not shrinking; it is converting, on a clock set by the carriers.

That makes the company's wager look less contrarian over time and more like timing. As 5G matures and IoT pushes more devices onto cellular, the managed-line model MarketSpark built for fire panels and elevator phones starts to look like the default way enterprises will connect anything that has to be reliable and remotely watched. The dial tone was just the beachhead.

Back in that stairwell, the fire panel is still waiting. The copper behind it is gone, retired by a carrier on a schedule nobody asked the building to approve. And yet the line is live, monitored, and ready - so the panel can keep doing nothing, magnificently, until the one moment it can't afford to. That is what MarketSpark sells. Not a phone line. The promise that you'll never have to think about one.