Fun has raised $72 million in Series A funding to build unified payment rails that connect fiat and crypto for consumer apps like Polymarket and Aave, after quietly processing over $18 billion in annual transaction volume.
Summary
Fun secured $72M in a Series A round led by Multicoin Capital and SignalFire to expand fiat and crypto payment infrastructure.
The company supports deposits and withdrawals for platforms like Polymarket, Lighter, and Aave, and has processed more than $18B in yearly volume.
Backers include Infinity Ventures, Pharsalus Capital, and Justin Mateen, as Fun positions itself as a neutral API-driven “money layer” for both Web2 and Web3 apps.
$72M push to unify payment rails
The startup is building infrastructure that blends traditional banking systems with blockchain networks, enabling apps to handle fiat and crypto transactions through a single integration. Its services already power fund flows behind platforms such as Polymarket, social app Lighter, and DeFi protocol Aave.
According to reports, Fun has processed over $18 billion in transaction volume in the past year, highlighting growing demand for seamless cross-rail payments.
Simplifying fiat-to-crypto access
Fun’s core offering focuses on removing complexity around banking partners, liquidity management, and compliance. Through one API, developers can enable users to move funds between local currencies, stablecoins, and onchain applications without friction.
Operating behind the scenes, the platform acts as the “plumbing” connecting banks and blockchains—allowing users to transact without needing to directly interact with crypto exchanges.
Infrastructure bet on the next wave
The model reflects a broader trend where infrastructure providers handle large-scale stablecoin flows while staying invisible to end users. Fun’s edge lies in targeting consumer apps that demand instant settlements and smoother onboarding.
This type of system lowers barriers to entry for DeFi platforms like Aave, making it easier for mainstream users to access onchain finance.
Bigger picture: payments meet crypto
With billions still spent annually on traditional remittance fees, unified payment rails could accelerate the shift toward digital dollars and blockchain-based transfers. Stronger fiat–crypto bridges may also amplify capital flows into major assets like Bitcoin and Ethereum during favorable macro conditions.
At the same time, sectors like real-world assets and institutional DeFi are becoming increasingly reliant on neutral infrastructure that seamlessly connects bank accounts with smart contracts.
What it signals
With fresh funding and significant transaction volume already under its belt, Fun is positioning itself as a key intermediary in the evolving financial stack—where control over payment rails could shape how money moves between traditional systems and blockchain networks in the years ahead.
