The startup's name might suggest otherwise, but Fun is in the business of moving money between traditional banking systems and blockchain networks—a junction that remains one of the crypto economy's most stubborn friction points.
The New York-based payments infrastructure platform announced May 1 that it closed a $72 million Series A in late January, a round co-led by Multicoin Capital and SignalFire. Joining them: Infinity Ventures, Pharsalus Capital, and Justin Mateen, the Tinder co-founder who has quietly become a fixture in crypto infrastructure investing. The company declined to disclose its valuation.
What Fun did share: it now processes more than $18 billion in annual payment volume. That's not a typo. Among its clients is Polymarket, the prediction market that became something of a household name during the 2024 U.S. election cycle, along with on-chain derivatives platform Lighter and DeFi lending giant Aave. The company claims a success rate exceeding 99.999% and settlement times under five seconds, according to the company.
Perhaps more telling than the numbers is the timing.
When the Rails Finally Start to Merge
Just two days before Fun's funding announcement, Meta revealed plans to roll out USDC payouts on Solana and Polygon for creators in Colombia and the Philippines. DoorDash has been testing stablecoin disbursements through the Tempo blockchain. Western Union—yes, that Western Union—announced its own stablecoin on Solana, slated for a May 2026 launch.
The pattern is hard to miss. Stablecoins are edging from the crypto-native fringe toward mainstream payment infrastructure, and companies like Fun sit precisely at that crossroads.
"As fintechs and other neobanks around the world start to adopt tokens and stablecoins, I think Fun is well-positioned," Spencer Applebaum, a general partner at Multicoin Capital, told Fortune in an exclusive interview. It's the kind of measured bullishness that venture capitalists have learned to deploy carefully after years of crypto's boom-bust theatrics.
The Middleware Play
Fun operates as what's known in the industry as middleware—the connective tissue between traditional payment systems and blockchain protocols. Founded in 2022 by CEO Alex Fine, who left Stanford in 2020 to run a crypto fund before pivoting to infrastructure, the company offers four core products: deposit optimization (both crypto and fiat), instant withdrawals, payment orchestration (routing and liquidity management across different rails), and a unified checkout that supports more than 50 payment methods across over 100 countries.
Fine and co-founder Mario Baxter built the company around what they identified as a persistent chokepoint: the difficulty of moving capital between legacy financial systems and decentralized protocols without friction, delay, or punishing fees. Nearly 30 employees now work from offices in New York and Singapore, serving a client roster of more than 20 companies.
Josh Stevens, Polymarket's VP of Engineering, offered a public endorsement in Fun's announcement, highlighting what he called "strong reliability and conversion rates" for the platform's deposit infrastructure. Developer documentation confirms that Fun handles the bridging path between users and Polymarket's on-chain settlement layer—no small feat given the volatility and regulatory scrutiny prediction markets have faced.
Capital Deployment and Growing Pains
The new funding will support Fun's expansion across Asia-Pacific, including formalizing its Singapore presence. The company also plans to scale engineering and operations teams.
Curiously, Fun's announcement concluded with "We're hiring"—though its careers page showed no open positions as of May 2. Whether that's a lag in posting roles or a signal of more selective expansion remains unclear.
The Series A marks a dramatic escalation from the company's $3.9 million pre-seed round in October 2022, which was led by Mateen's JAM Fund and included checks from Soma Capital, NOMO Ventures, Great Oaks VC, and angel investor Cory Levy. Between fundraises, Fun maintained a relatively low profile, a rarity in an industry often characterized by aggressive hype cycles.
What comes next may depend less on Fun's technology—which by most accounts works as advertised—and more on whether the broader market's appetite for crypto-fiat infrastructure can sustain the kind of growth these investors are betting on. The rails are being built. The question is whether enough people will actually cross them.
