DENVER, CO — When the latest round of property tax assessments landed in mailboxes across Colorado, thousands of homeowners felt the same thing: disbelief, then helplessness.

“I opened the envelope and just stared,” said Marilyn, a longtime Parker resident. “The number didn’t make sense—but what was I supposed to do about it?”

For years, homeowners like Marilyn have watched their property taxes climb, feeling powerless against a system that seems complicated by design. Yes, there’s a right to appeal—but few have the time, tools, or expertise to fight back. That’s what makes Assessorly, a new Colorado-based startup, such a timely innovation.

Founded by Denver appraiser and valuations expert Martin Froehlich, Assessorly is the first online platform dedicated to helping regular people understand—and successfully challenge—their property tax assessments. It’s simple: type in your address, get a free estimate of whether your home is fairly assessed, and if you’re being overtaxed, Assessorly can prepare and file an appeal on your behalf.

The service costs $250 for most homes and covers appeals for up to three years (two tax cycles), going back to 2023. Optional services and a subscription plan offer future peace of mind.

At a recent town hall in Parker, Froehlich stood before a room of 50 skeptical homeowners. But within minutes, skepticism turned to amazement. As attendees typed in their addresses, the room buzzed with the realization that many had likely been paying too much—sometimes by thousands of dollars.

One homeowner, taxed $4,200 based on an $840,000 valuation, saw an instant revaluation estimate of $670,000—translating into savings of over $2,100 across three years. “This isn’t guesswork,” Froehlich said. “It’s comps, data, and math—just applied with more care than the system often allows.”

For many, the numbers weren’t just impressive—they were emotional.

“It was like someone finally stood up for us,” Marilyn said. “He wasn’t selling fear. He was offering facts—and a way to take back control.”

The Assessorly Appeal provides detailed reports complete with neighborhood sales comparisons, adjusted valuations, and a professional-grade appeal package. And if the process moves to a formal hearing at the Board of Equalization, Assessorly assigns a dedicated consultant—someone who knows the system and how to work within it.

Froehlich speaks passionately about the mission. “We’re not here to game the system,” he says. “We’re here to make it fair, accessible, and human. These are real people. Real homes. And real money that can make a difference.”

From Highlands Ranch to Wash Park, early users are spreading the word: Assessorly is turning confusion into confidence—and giving homeowners a fighting chance.