Build Celo

Get a taste of Baklava, Celo’s incentivized testnet, and participate in The Great Celo Stake Off

The Great Celo Stake Off


Learn how to run a node on Celo’s peer-to-peer network and take a slice of up to 2 million Celo Gold in rewards.*

The Challenge

Starting December 4th, all chefs, bakers, and validators were invited to compete for the ultimate glory: honor, food, and Celo Gold.


If you have a technical background and you’re interested in open source, security, or building & operating infrastructure, you’d make a perfect Celo validator!

Ranking Baklava Validators

The Great Celo Stake Off Leaderboard

Baklava Testnet Units (BTUs)

Full Stack Approach

Celo Layers of Technology

Each layer of the technical stack is designed to meet mobile user needs.
Send or Request cUSD easily with anyone in your address book, powered by decentralized phone number verification
  • Non-custodial wallet
  • Mobile ultralight client
  • Exchange between cUSD and cGLD
  • QR Code Support
  • Mobile first SDK
Core Contracts
Designed to support an ecology of stable value currencies. The first stablecoin, cUSD, tracks the value of 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.
  • Proof of Stake based consensus with high throughput, low latency, and zero carbon
  • Incentives for serving mobile devices
  • On-chain governance

Browse the Code

Explore and contribute to the Celo codebase

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.
Self Custody
Users have access to and control of their account secret keys.
Proof of Stake
Permissionless consensus algorithm running on decentralized infrastructure.
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.

Engage with Celo

For Developers

Extend & Enrich the Ecosystem

Alfajores Testnet
Try out the Celo Protocol and Celo Wallet. Build dApps for the Celo platform.
Add Alfajores Funds
Top up your wallet on an existing Testnet account
Learn about the technology behind the Celo Protocol & Celo Wallet

For Validators and Full Nodes

Operate Celo

Baklava Testnet
Participate in testing and hardening the Celo Protocol. Deploy a Full Node or Validator and win prizes.
Deploy Celo blockchain software and connect to Baklava
Technical Blog
Learn about Proof of Stake, validating and incentives in the Celo Protocol

Contribute To Celo

There are a variety of resources to support contributions to Celo, including: grants, security bounties, an Ecosystem Fund, fellowships, and more.

Code of Conduct

Shared norms and behaviors are the foundation of a beautiful community. Please read and respect our code of conduct.


Brand Toolkit
Design with Celo


Contribute to the codebase
Collaborate and get developer support
Ask technical questions
Connect in Person

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Nothing herein constitutes an offer to sell, or the solicitation of an offer to buy, any securities or tokens.
Designed & Built by cLabs, © Celo 2020