and Free Smart-Contract Security Audits

Callisto Network is a decentralized open source crypto platform based on the go-Ethereum source code with its own cryptocurrency ‘CLO’. The main goal of Callisto is to research and develop a reference implementation of a self-sustaining, self-governed and self-funded blockchain ecosystem and development environment.

Hero Art
CLO Cold Staking

First Cold Staking Coin

Cold Staking is a protocol that rewards long-term coin holders for holding their CLO coins. Cold Staking is not related to PoS nor a consensus mechanism. Cold stakers receive passive income for holding their coins.

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CLO Smart Contracts

Free security audits via a fine-tuned audit process

Smart-contract hacking results in millions of dollars of lost revenue for the whole ecosystem. The Callisto Network offers a completely free service to audit professionally written smart-contracts.

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On-chain governance system

Callisto Network is a reference implementation of a self-sustained, self-governed, self-funded blockchain ecosystem.

Scalability of the CLO and ETC networks

Callisto aims to establish a secure and contribution-friendly environment for further protocol development and improvements.

Financial transparency

Callisto aims for full financial transparency. Check out our financial report below.

Financial report


Up to date roadmap report

Roadmap Element
Q1 2018
  • Update ClassicMask with Callisto Network
  • Snapshot taken of the Ethereum Classic balances for a 1:1 CLO airdrop
  • Launch Testnet 2.0
  • Research the possibility of a POS and DPOS protocol implementation.
Roadmap Element
Q2 2018
  • Launch the CLO Mainnet (Est. April 15, 2018)
  • DexNS support for the Callisto protocol
  • Marketing team creation
  • Launch the explorer with advanced features such as:
    • Readable transactions including smart contracts instructions
    • Token explorer
    • Testnet support (Callisto, Ethereum, Ethereum Classic)
Roadmap Element
Q3 2018
  • Formation of the Security Department of Callisto (Solidity)
Roadmap Element
Q4 2018
  • Planned Hardfork No. 1: Cold staking implementation
Roadmap Element
Q1 2019
  • Analyze constantinople behavior for further implementation on Callisto Network Blockchain HardFork #1
  • Start researching a new monetary policy
  • Continue looking for a satisfactory IPFS to implement on Callisto Network
Roadmap Element
Q2 2019
  • Reward program will be implemented for tech writers who will write about Callisto and its technology. The rewards will depend on the quality and effort of the freelance writers. The posts - tutorials - opinions - and whatever we think will be good enough will be posted on the Callisto official forum. The best ones will be also posted on the Callisto official channels. A reward table will be implemented and Callisto will create a team that will check, verify and qualify the job and determine what will the reward be if the post accomplishes quality level.
  • Implement Galilei, a full Callisto compatible Testnet for smart contracts and dApps developers
  • We will be looking forward to increasing and improving our community with PR. For this matter, we will get Advisors on board who will let the world know about CLO.
Roadmap Element
Q1 2020
  • CLO <> EOS Token Swap UI.
  • ETH-Based client update.
  • Cold Staking V2 HardFork.
  • Test Governance System at CLO Mainnet
Roadmap Element
Q2 2020
  • Listing of CLO EOS Token at EOS DEX'ES.
  • Development of media resources and improvement of security audit SEO.
  • Monetary Policy for the sake of compatibility of CS at EOS token and CLO Mainnet.
  • Request for funding of auditing department at EOS proposal system.
Roadmap Element
Q3 2020
  • Governance system for EOS token.
  • Cold Staking for EOS-Based token.
Roadmap Element
Q4 2020
  • Security auditing department on EOS.


Callisto (CLO) is a minable coin with a PoW algorithm.

Technical details

Block reward

216 CLO

(10% treasury fee)

POW Algo

Dagger Hashimoto


100% compatible with

Ethereum Virtual Machine

The maximum supply:

6,500,000,000 CLO

Block reward reduction:

40% each 1,500,000 block (~250 days)

Block interval

~15 sec

Our Team

Yohan Graterol
Yohan Graterol
CEO & Main Callisto Developer

Hi, I am a backend developer (Python and Go) with over seven years of experience. I have worked as Head of Engineering for three years. The cryptocurrency world is my passion.


My main specialty is information security. I’ve been an Ethereum smart-contracts developer since its first days. I created the ERC223 token standard and founded DEX ICO and the Ethereum Commonwealth. I was formerly a security auditor.

Yuriy Kharytoshyn
Yuriy Kharytoshyn
Head of Security Department

I’m an Information Security expert with over 18 years experience. Backend Developer (C/C++, Python, PHP, Assembler) of InfoSec related projects. Since 2016, focused on Blockchain technologies and Smart contract security. A Master of Science (M.Sc.) in Computer Science and Мathematic.

Laurent Riche
Laurent Riche
Head of Community

After obtaining a degree in automated mechanical systems, I have spent the most part of my technician career in the bosch group. After that, I founded and managed a home delivery company for food products serving the main French cities. Passionate about IT for over 20 years, I am a perfectionist, who likes teamwork and challenges.

Maximus E
Maximus E
Callisto Admin

BS in engineering, CEO in a company im a partner in, so I've a long term experience in dealing with people and businesses. Analyst and daily trader, technology and blockchain is my passion.

Our Partners

Enterprise Ethereum Alliance
Magnum Wallet