Google Cloud is preparing to enter the crowded blockchain infrastructure market, pitching its Universal Ledger (GCUL) as a base layer that any bank or fintech can use, in contrast to rival projects launched by Stripe and Circle.
The company first hinted at the project in March when it announced a pilot with CME Group to explore wholesale payments and asset tokenisation. On Tuesday, Rich Widmann, Google Cloud’s head of Web3 strategy, published new details on LinkedIn, calling GCUL the product of “years of R&D” and describing it as a Layer-1 blockchain with Python-based smart contracts.
“Any financial institution can build with GCUL,” Widmann wrote. “Tether won’t use Circle’s blockchain — and Adyen probably won’t use Stripe’s blockchain. But any financial institution can build with GCUL.”
The timing is pointed. Earlier this month, Circle unveiled its Arc blockchain, designed for stablecoin payments, FX and capital-markets applications. Stripe is reported to be building Tempo, a high-throughput chain geared toward enterprise payments. Each reflects an effort by tech firms to extend their reach from payment services into the underlying financial plumbing.
Circle already has a strong foothold in stablecoin markets through USDC, while Stripe processes transactions for millions of merchants worldwide. Google is betting that neutrality — offering rails not tied to any single issuer or PSP — could appeal to banks wary of building on a competitor’s chain.
Google’s biggest public pilot so far is with CME Group, one of the world’s largest derivatives exchanges. The two companies signed a 10-year cloud deal in 2021 alongside a $1 billion investment from Google into CME. Earlier this year, CME confirmed it had completed the first phase of integrating GCUL for payments and tokenisation, with further work underway.
GCUL is currently understood to be running in a private testnet, with more technical specifications expected later in 2025. Developers will be able to use Python to write smart contracts, a choice that could lower barriers for financial engineers who lack experience with Solidity or Rust.
The rollout comes as lawmakers in Washington and Brussels are crafting new rules for stablecoins and digital money, and as global payments firms explore token-based settlement. If Google can position GCUL as the “neutral ground” for these institutions, it could replicate the role its cloud unit already plays in hosting infrastructure for exchanges, fintechs and banks.
The coming months will reveal whether GCUL can move beyond pilots into live flows — and whether Google can persuade a cautious financial sector to let the search giant run part of its payment rails.
