Polymarket vs. Kalshi: The Full Meme War Timeline

Original Article Title: Polymarket v. Kalshi: A Complete Timeline of The Prediction Market Meme Wars
Original Article Author: Hunter Ryerson, Pirate Wires
Translation: Peggy, BlockBeats

Editor's Note: From a free grocery store to a meme-filled tit-for-tat, the competition between Polymarket and Kalshi has long transcended mere product and market share rivalry, evolving into a carefully crafted battle for attention. This article outlines the timeline of the two prediction market platforms' years-long confrontation: regulatory maneuvering, user bans and reinstatements, "competitive meme-ing" on social media, and a marketing spectacle that spilled over into the real world. Behind the seemingly absurd theatrics lie rising transaction volumes, valuations, and capital expectations.

Below is the original article:

February 12, early morning, Manhattan. You wake up in a $2000-per-month, shoebox-sized apartment, turn up the heat, shuffle to the pantry to see if you can scrounge up some breakfast. Then you remember: at 3:00 AM last night, you already ate the last pack of instant noodles.

Just as you're debating whether to continue contributing 20% of your income to DoorDash, a friend texts you, informing you of a new grocery store on Madison Street called "The Polymarket" — and everything inside is free. So, naturally, you put on your pants, head downtown, manage to squeeze into the store, and instantly shift into "Black Friday frenzy" mode, frantically grabbing everything in sight, filling your debt-laden hands with whatever you can get your hands on.

As you walk back home with bulging shopping bags filled with Sour Patch Kids and the first vegetables you've seen in weeks tucked under your arms, you pass by a billboard: a market in the East Village is hosting an event sponsored by a company named "Kalshi," offering a $50 free grocery credit.

Am I dreaming? How did I get so lucky?

Congratulations, you've been swept into the latest round of the prediction market's ad blitz.

That's right. This week, the red-hot prediction market platform Polymarket announced its latest marketing stunt: opening a "completely free grocery store" in New York City, operating from February 12 until February 16.

Meanwhile, its competitor and another prediction market, Kalshi, is not one to back down either. It took the initiative to launch its own "Grocery Theme" marketing campaign: at the Westside Market on Third Avenue, for one day only, everyone was given a $50 general grocery subsidy.

This "tit for tat" imitation behavior prompted a user X to couldn't help but comment, "Kalshi and Polymarket can't even go 24 hours without copying each other at everything."

At first glance, the fact that Polymarket and Kalshi are competing with "free bananas" for marketing seems a bit absurd. However, this is just the latest scene in the long-standing rivalry between these two platforms. It's important to note that their weekly trading volume reaches up to billions of dollars. In essence, their business model is simple: people can bet on seemingly trivial events to earn high returns, such as—whether the US military will arrest Venezuelan leader Nicolás Maduro while he is wearing athleisure attire. (That night, an unknown but hopefully not Pete Hegseth internet sleuth made a killing.)

Overall, in the brief five-year development history, these two prediction market platforms have always been competitors, but the real intense confrontation has only fully erupted in the last two years.

Polymarket, founded by NYU dropout Shayne Coplan in 2020, is a cryptocurrency-based platform. Bettors need to deposit stablecoins like USDC on the Polygon blockchain to purchase "yes" or "no" prediction shares.

In contrast, Kalshi initially operated almost entirely in dollars, with transactions and fund access completed through traditional bank accounts. Since its launch in 2021, it has primarily focused on sports betting, which accounts for 90% of the platform's total trading volume. Polymarket, on the other hand, leans more towards geopolitical and cultural events, such as wars, conflicts, and elections. It even pays American internet celebrities to promote its political content.

From 2022 to 2025, due to intense regulatory pressure from the US Commodity Futures Trading Commission (CFTC) (and a $1.4 million fine), Polymarket temporarily banned US users from its platform, essentially ceding the US market to Kalshi for several years. However, just a few months ago, Polymarket re-entered the US market, reigniting the fierce rivalry between the two, and various frictions continue to play out on the X platform and even in the broader online space.

For internet users who are "online all year round," the most entertaining part of this war is undoubtedly the so-called "competitive shitposting."

In the sports arena, this strategy takes the form of parodical imitations of sports official announcement cards, the kind you often see on ESPN or FOX Sports accounts, used to announce trades, drafts, or injury news. Both platforms use eye-catching jokey headlines to "report" sports news, such as Polymarket's "DICK IS GROWING," referencing Toronto Raptors player Gradey Dick's weight gain, or Kalshi's "LOVES RECEIVING BALLS," referring to San Francisco 49ers running back Christian McCaffrey, stating that he "loves catching balls," you know, in the literal sense of "receiving passes."

However, as both sides engage in a battle for "meme-based attention," the tactics have started to get more devious.

In November 2024, evidence emerged that Kalshi attempted to pay off some internet celebrities—such as former NFL wide receiver and current X-platform personality Antonio Brown—to have them post and spread negative comments about Polymarket (see: "Kalshi Enlists Influencers to Attack Polymarket CEO Following FBI Raid"). In one case, a journalist was reportedly offered $3,500 to write a "hit piece" against Polymarket. (On a side note: if Solana were willing to pay me that much to write a hit piece, I could have Jackie Fielder impeached by Monday.)

Reportedly, these influencers "managed" by Kalshi collectively have millions of followers. Over the past few years, they have been slowly chipping away at Polymarket's credibility.

Following this incident, the Trump administration relaxed regulations on prediction markets, allowing Polymarket to make a strong comeback in the U.S. market. After months of preparation, the U.S. user ban was officially lifted in December, and now Polymarket is attempting to reclaim the majority share of the on-chain prediction market (currently dominated by Kalshi after integrating with the Solana blockchain).

One way they found to "amplify their voices" is by making headlines on X. Over the past few months, the brand accounts of Polymarket and Kalshi have clashed head-on on the timeline, vying for dissemination advantage with short, powerful headlines, celebrity quotes—sometimes even disregarding accuracy or any other principles. Recently, Polymarket falsely attributed a quote to Jeff Bezos and significantly exaggerated deportation data, while Kalshi spread false claims about negotiations to acquire Greenland.

Ultimately, this feud has spilled over from online to the real world, and hopefully it can still bring some positive 'spillover effects' to ordinary, cash-strapped Americans like yourself. But the real crux of the matter is this: whether it's marketing gimmicks like 'free groceries' or mutual mocking and trampling on X platform, both companies excel at generating buzz and keeping people talking about them.

Regardless of how dubious or darkly generous their antics are in order to one-up each other, we are always discussing the matter.

Perhaps that is exactly what they are aiming for. The valuations of Kalshi and Polymarket have now reached $11 billion and $9 billion, respectively, and are continuing to soar at an astonishing pace. So, as long as the dramatic maneuvers in this crazy war can attract a few hundred more bettors online or bring in a few more investors, then it’s all worth it. It's a win-win for these two 'duelists,' if you're willing to believe.

[Original Article Link]