Overview of Celo Mainnet and the Celo Sepolia Testnet.
Celo Mainnet
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Celo Sepolia Testnet
The Celo Sepolia Testnet is Celo’s new developer testnet built on Ethereum Sepolia, designed to replace Alfajores following the planned Holesky deprecation in September 2025.
Key Features:
- Fresh State: Starts with a clean slate, no state inheritance from Alfajores
- L1 Foundation: Built on Ethereum Sepolia for enhanced stability
- Developer-Focused: Provides the same developer experience as Alfajores
New Celo Sepolia Testnet Now Live!Try Celo’s new developer testnet on Ethereum Sepolia.
Learn more → The Celo Sepolia Testnet is designed for testing and experimentation by developers. Its tokens hold no real world economic value. The testnet software will be upgraded on a regular basis. This will erase your accounts, their balance and your transaction history. You may encounter bugs and limitations with the software and documentation.
