Get a Taste of Alfajores

Developer resources for the Celo Protocol and Celo Wallet


Learn about the technology behind the Celo Protocol and Celo Wallet

Add Funds

Top up an existing Testnet account

Browse the Code

Explore and contribute to the Celo codebase


Build on the Celo Platform

Full Stack Approach

Each layer of the technical stack is designed to meet mobile user needs.
Seamless experience enabled by stablecoins and mobile-friendly proof of stake protocol.
Core Contracts

Celo Platform Features

Stable Value Currencies
Native support for multiple ERC20-like stable currencies.
Phone Number Public Key Infrastructure
Mapping of phone numbers to addresses to facilitate user experience.
On-chain Governance
Protocol changes managed via on-chain governance.
Proof of Stake
Permissionless consensus algorithm running on decentralized infrastructure.
Self Custody
Users have access to and control of their account secret keys.
Very Fast Sync for Ultra-light Clients
Block headers optimized for fast mobile phone synchronization.
Gas Payable in Multiple Currencies
Option to pay transaction fees in stable currency.
Programmable (Full EVM Compatibility)
Programmable smart contract platform compatible with Ethereum Virtual Machine.

The Celo Stack



Send or Request Celo Dollar easily with anyone in your address book, powered by decentralized phone number verification
  • Non-custodial wallet
  • Mobile ultralight client
  • Exchange between Celo Dollar and Celo Gold
  • QR Code Support

Core Contracts

Designed to support an ecology of stable value currencies. The first stablecoin, cUSD, is pegged to the US Dollar.
  • Algorithmic reserve-backed stabilization mechanism
  • Crypto-asset collateralized
  • Native support for multiple stablecoins


Open source smart contract platform built on decentralized infrastructure.
  • Permissionless BFT-based consensus algorithm
  • Rewards weighted by stake size and stake release notice period
  • On-chain governance

Developer Updates

Developer News

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真金不怕火煉|True gold fears no fire
Nothing herein constitutes an offer to sell, or the solicitation of an offer to buy, any securities or tokens.
Designed & Built by C Labs, © Celo 2019