Prediction Market Overview: Polymarket vs. Kalshi
Prediction markets, as an emerging financial instrument, allow users to bet on the outcome of future events, thereby forming a consensus on the probability of these events. In this field, Polymarket and Kalshi are two highly-watched platforms, each representing different operating models and regulatory paths. Polymarket is a decentralized prediction market running on the Polygon blockchain, while Kalshi is a federally regulated financial exchange overseen by the U.S. Commodity Futures Trading Commission (CFTC).
Polymarket: Decentralization and the Path to Regulation
Polymarket was founded in 2020, initially as a decentralized platform using USDC for transactions. Its development journey has been full of challenges, especially regarding regulation.
- Regulatory Compliance: In January 2022, Polymarket was fined $1.4 million by the CFTC and issued a cease and desist order for operating as an unregistered derivatives platform. To address regulatory issues, the platform acquired QCEX, a CFTC-licensed derivatives exchange, in July 2025, and relaunched in the U.S. as Polymarket US in December 2025, under CFTC regulation. Its international platform continues to operate outside the U.S. with geo-restrictions for U.S. users. As of August 2026, Polymarket's U.S. operations are still being rolled out gradually and are not fully operational in all states.
- Valuation and Funding: Polymarket's valuation has grown rapidly over the past year. Valued at $1 billion in June 2025, it reached $15 billion by April 2026. As of August 31, 2026, reports indicate that Polymarket is seeking a new funding round led by 1789 Capital, targeting a valuation of $21 billion and aiming to raise $1 billion. Its total funding has reached $2.674 billion, with investors including Vitalik Buterin, Founders Fund, and Intercontinental Exchange (ICE).
- Trading Volume and Revenue: In Q1 2026, Polymarket's trading volume reached $26.17 billion. For the 30 days leading up to September 4, 2026, its trading volume was $3.1 billion. In terms of revenue, its annualized revenue exceeded $1 billion in June 2026. Polymarket fully implemented a trading fee system on March 30, 2026.
- Market Focus: Historically, Polymarket has excelled in international politics, cryptocurrency-related events, and internet culture markets, also covering sports, geopolitics, finance, economics, weather, culture, and technology. Sports betting accounts for approximately 45% of its daily trading volume.
- Challenges and Risks: Polymarket has faced regulatory issues and has been banned in several countries. Insider trading and manipulation attempts have been observed on its platform.
Kalshi: The Regulated Traditional Finance Path
Kalshi was founded in 2018 and officially launched in July 2021. It chose a path more closely integrated with traditional financial markets, becoming a federally regulated financial exchange.
- Regulatory Compliance: Kalshi received CFTC approval in 2021 to operate as a Designated Contract Market (DCM), which allows it to operate legally in most U.S. states as it is subject to federal derivatives regulations rather than state-level gambling laws.
- Valuation and Funding: Kalshi's valuation growth has been even more rapid. It was valued at $5 billion in October 2025 after completing a $300 million Series D funding round, and reached $22 billion by May 2026 with a $1 billion Series F round. As of September 2026, Kalshi is seeking at least $750 million in funding, targeting a valuation of $40 billion. Its investor lineup is strong, including Andreessen Horowitz (a16z), Sequoia Capital, Paradigm, and Coinbase Ventures.
- Trading Volume and Revenue: Kalshi has shown outstanding performance in trading volume. Its Q1 2026 trading volume was $33 billion. For the 30 days leading up to September 4, 2026, its trading volume reached $14.1 billion, significantly higher than Polymarket. In May 2026, its annualized trading volume more than tripled to $178 billion, with annualized revenue exceeding $1.5 billion.
- Market Focus: Kalshi focuses on the U.S. market, dominating in sports (NFL, NBA, MLB) and U.S. macroeconomic data (Federal Reserve interest rate decisions, CPI, employment data). Sports events account for over 80% of its total trading volume.
- Advantages: As a federally regulated exchange, Kalshi provides transparency and security to users, actively screens to prevent insider trading, and conducts 24/7 real-time trading surveillance.
Investment Value Comparison: Which is More Attractive?
When evaluating the investment value of Polymarket and Kalshi, multiple dimensions need to be considered comprehensively:
- Valuation and Growth Potential: Kalshi's pursuit of a $40 billion valuation in September 2026 indicates a faster valuation growth rate than Polymarket. Kalshi's valuation premium is primarily attributed to its leading share in the U.S. market, clear regulatory status, and strong distribution capabilities through platforms like Robinhood and Coinbase.
- Regulation and Market Access: Kalshi has been a CFTC-regulated DCM since 2021, giving it a clear regulatory advantage and broad legality in the U.S. market, which allows it to better attract institutional investors. While Polymarket has regained regulatory approval for the U.S. market, its U.S. operations are still being rolled out, and its international platform remains restricted.
- Trading Volume and Revenue: Kalshi leads Polymarket in both trading volume and revenue. For the 30 days leading up to September 4, 2026, Kalshi's trading volume accounted for approximately 82% of the combined total. Kalshi's annualized revenue is also higher than Polymarket's.
- Business Model and Fee Structure: Kalshi charges higher and uniform transaction fees, with a revenue model more focused on realized income. Polymarket offers lower, category-specific transaction fees and provides rebates to market makers, with a revenue model more dependent on trading volume growth.
- Market Focus and User Base: Kalshi performs strongly in U.S.-centric markets, attracting a large number of U.S. users and institutions. Polymarket, on the other hand, has an advantage in global, crypto-native markets such as international politics, cryptocurrencies, and internet culture.
- Risk Considerations: Polymarket has faced regulatory challenges, and its decentralized nature and cryptocurrency settlement may introduce additional regulatory and legal gray area risks. Prediction markets as a whole continue to face ongoing debate from regulators over whether event contracts should be considered derivatives or gambling products.
Conclusion
Kalshi, with its clear federal regulatory status, leading share in the U.S. market, strong institutional adoption, and higher trading volume and revenue, demonstrates a more stable and predictable growth path, especially suitable for investors seeking regulated, traditional financial market integration.
Polymarket, with its decentralized, crypto-native characteristics and broader global market coverage, has advantages in specific niche markets (e.g., global politics, cryptocurrencies). Its regaining of U.S. regulatory approval and pursuit of high valuation indicate its future growth potential, but may come with higher regulatory and operational complexity.
The ultimate investment value depends on an investor's risk appetite, views on the regulatory environment, and expectations for growth potential in different markets.
