In a downtown drama that feels more tech thriller than Wall Street, prediction market startup Polymarket says it suspects archrival Kalshi of spying on staff at its SoHo offices after a string of closely timed product rollouts and publicity stunts that executives call "too many coincidences." What began as a high stakes product race has turned into a tense office level standoff in Lower Manhattan, with Polymarket leaders telling colleagues the pattern feels targeted. The company says it has taken extra precautions, including tinting its office windows and compiling what staff describe as a "copycat" dossier, while it weighs next steps.
Polymarket lays out its case
As reported by the New York Post, Polymarket leaders say roughly a dozen incidents have piled up into a pattern they find worrying. The company told the paper it cataloged alleged copying and timing overlaps in an internal "copycat" file, and Polymarket CMO Matthew Modabber told the Post there were "a couple too many coincidences."
Timing, product teases and a fast moving perps race
Industry coverage shows those product announcements landing almost on top of each other. Reporting surfaced that Kalshi planned a perpetual futures push and, just hours later, Polymarket posted its own teaser about launching perpetuals. Polymarket's April 21 post on X, "We price the future. Now you can lever it. Perps are coming to Polymarket." was visible on the company’s account, and Polymarket on X and outlets summarizing The Information’s scoop about Kalshi’s "Timeless" product highlighted how close the two moves came in time. Yahoo Finance coverage of The Information’s report captured the sequence that Polymarket says raised eyebrows.
Regulatory backdrop makes the fight material
The rivalry is not just personal. It comes with real regulatory stakes. Kalshi operates as a CFTC regulated designated contract market, and on May 29 the Commodity Futures Trading Commission issued an order approving KalshiEX, LLC’s BTCPERP, a bitcoin referenced perpetual futures contract, for listing. The CFTC’s order says the contract must be listed and maintained in compliance with the Commodity Exchange Act and related rules. The CFTC release underscores why product timing matters for oversight and market integrity.
Publicity stunts spill into Manhattan streets
The tension has not stayed inside conference rooms. In February, Kalshi ran a short $50 grocery giveaway at a Manhattan shop, and Polymarket answered with a multi day, branded pop up called "The Polymarket" and a $1 million Food Bank donation, according to local reporting. Those street level PR salvos, which both companies touted, are now part of the sequence Polymarket points to in its concerns. BeInCrypto coverage of the grocery pop ups documents the timeline.
Kalshi and backers push back
Kalshi and some of its investors strongly reject the spying narrative, arguing it is a misread of hard nosed competition in a small, fast moving sector. As the New York Post recounts, a Kalshi spokesperson dismissed the idea as "sad and borderline delusional," and a Paradigm spokesperson told the paper "this is laughable." In their telling, the product launches and marketing antics are standard aggressive playbook material, not the result of covert surveillance.
Why local readers should care
Beyond two feuding startups, the dispute lands in the middle of a broader clampdown on prediction markets, which are under heightened scrutiny for insider trading and manipulation. That scrutiny has drawn state actions and federal attention this year. Regulators have tightened platform rules and signaled they will take suspicious trading seriously, making any allegation that touches on employee monitoring or targeted information potentially material for enforcement. AP coverage notes the wider probe environment now hovering over the industry.
What comes next
For now, Polymarket says it is continuing an internal review and keeping its security measures in place, while Kalshi says it will "keep building." Regulators and local observers will be watching to see whether the accusations lead to formal inquiries or simply become the latest chapter in a very public tech rivalry playing out in the streets and offices of New York City.
