Fun, a fast-emerging payments infrastructure provider supporting large-scale internet-native capital markets such as Polymarket, has announced the successful close of a $72 million Series A funding round. The investment was co-led by Multicoin Capital and SignalFire, reflecting growing global demand for seamless, high-performance financial transaction infrastructure across fintech and digital ecosystems.
Founded in 2022, Fun has quietly developed its proprietary payments technology in stealth mode, positioning itself as a foundational layer for platforms operating at global scale. The company currently powers critical financial operations—including deposits, withdrawals, and settlement flows—for platforms such as Lighter and Aave. With an annual transaction volume exceeding $18 billion, Fun supports millions of users across more than 100 countries.
“Fun is focused on a simple but foundational problem: removing the technological barrier of value exchange,” said Founder and CEO Alex Fine. “The infrastructure for moving money has not kept up with how the world actually works. We are building a system where value moves instantly, globally, and without friction”.
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Built by a lean, engineering-driven team, Fun has developed a unified payments layer designed to optimize conversion rates and reliability for global financial applications. Its infrastructure is engineered to handle complex, high-volume transaction environments where performance directly impacts user engagement and platform growth.
“Polymarket runs at a scale that breaks most payments infrastructure,” said Josh Stevens, VP of Engineering at Polymarket. “We’ve evaluated every major payments company, and Fun is in a different category. They operate like an extension of our team, building around real user behavior and catching edge cases others miss. They are meticulous about every detail. At our size, every percentage point of conversion is millions of dollars and millions of users, and every reliability failure becomes a public conversation. Fun has built the highest-converting, most reliable deposit flow we’ve ever had.”
The newly raised capital will be used to further enhance the company’s engineering capabilities, expand its presence in the Asia-Pacific region with a new office in Singapore, and pursue strategic acquisitions to strengthen its infrastructure stack.
“Financial markets have driven global prosperity for decades, but the systems behind them have not kept pace,” continued Fine. “They were built for a slower, more fragmented world. Different rails, different currencies, different systems that do not interoperate. That fragmentation shows up as friction, which is the enemy of conversion. Fun has solved that problem.”
As adoption accelerates across fintech platforms, trading ecosystems, and digital asset applications, Fun is positioning itself as a critical infrastructure provider for the next generation of financial services—abstracting the complexity of global money movement so businesses can focus on innovation and growth.
