Google Cloud is testing a new Layer 1 blockchain called GCUL that aims to serve banks, payments and asset tokenization with Python smart contracts.
Key Takeaways
- Google Cloud is developing a Layer 1 blockchain platform, called Google Cloud Universal Ledger (GCUL), designed for financial institutions.
- The platform supports Python-based smart contracts and is currently running in private testnet mode.
- CME Group is already piloting tokenization and payment use cases on GCUL, aiming for broader services in 2026.
- Google wants GCUL to be a “credibly neutral” alternative to proprietary blockchains developed by Circle and Stripe.
What Happened?
Google Cloud has stepped up its blockchain ambitions with the creation of a Layer 1 network called Google Cloud Universal Ledger (GCUL). Announced by Rich Widmann, the company’s Web3 Head of Strategy, GCUL is tailored to meet the needs of the financial industry. It supports Python-based smart contracts and aims to provide a neutral and programmable foundation for institutions looking to automate payments, manage digital assets and explore tokenization.
Google Cloud’s Institutional Blockchain Vision
GCUL represents a major shift in Google Cloud’s blockchain strategy. Previously known for providing cloud infrastructure to blockchain projects like Solana and Coinbase, Google is now building its own proprietary ledger.
- The initiative was first introduced in March 2025 in partnership with CME Group, one of the largest commodities exchanges in the world.
- CME has already completed its first phase of integration, focusing on low-cost, 24/7 settlement solutions for margin, collateral and fees.
- Full pilot testing with market participants is expected to roll out later in 2025, with services planned for 2026.
According to Widmann, GCUL is designed to be “performant, credibly neutral” and suitable for various financial use cases. Unlike blockchains operated by individual companies, GCUL is pitched as a common layer that banks and institutions can adopt, without being tied to a competitor’s ecosystem.
Google dropping some details on its L1 blockchain (GCUL) over on LI
— Omar (@TheOneandOmsy) August 26, 2025
Chain will feature python based smart contracts. Aims to be neutral infra built for finance w/ “native commercial bank money on-chain”, 24/7 cap markets infra, payments and agentic capabilities. Looks like they… pic.twitter.com/cB1vlq3Oyv
Positioned Against Circle and Stripe
GCUL joins a growing list of Layer 1 blockchains tailored for the financial sector.
- Circle is developing Arc, a blockchain optimized for stablecoin payments and capital markets, set to launch later in 2025.
- Stripe is building Tempo, a high-performance blockchain that supports Ethereum-based coding and is focused on payment processing.
Widmann argued that companies like Tether or Adyen would avoid using platforms built by their competitors. He sees GCUL as a viable alternative that can serve multiple stakeholders without locking them into a vertically integrated stack.
Features and Architecture
- GCUL is a private, permissioned Layer 1 blockchain, meaning it is not open to the public but can be accessed by approved institutional partners.
- It includes Python smart contract support, making it more accessible to developers familiar with mainstream programming languages.
- Google described it as a single API-based service that simplifies automated payments and digital asset management.
Despite its promise, some critics have questioned whether a blockchain fully controlled by Google can truly be “neutral” or “decentralized.” Widmann acknowledged these concerns and said the long-term plan includes allowing external companies to run and operate GCUL nodes themselves.
He also hinted at potential future involvement from tech giants like Amazon or Microsoft, indicating Google’s ambition to turn GCUL into a foundational infrastructure for the global finance sector.
CoinLaw’s Takeaway
In my experience, when big tech gets serious about blockchain, it’s no longer a niche trend. Google building its own Layer 1 blockchain is a huge signal that traditional finance is finally colliding with crypto infrastructure. What stands out to me is that GCUL is Python-based and explicitly made for financial institutions, not retail users or crypto startups. That tells you who Google is targeting: banks, exchanges and maybe even governments down the line. If this works, Google might just become the backbone of future digital finance. But the big question remains: can a Google-owned blockchain ever be considered truly neutral?
