Overview of Celo Mainnet and the Celo Sepolia Testnet.
Celo Mainnet
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.
