HashEx. Blockchain Audit and Consulting

One of the most impactful tech advisory in EMEA region. More than
30 global projects are running on blockchain integrations designed
by HashEx. 200+ smart contracts were audited in 2017-2021.

Latest news

300 MNS domains were sold

October 2019

Our congratulations for early MNS customers. Enjoy safe domains!

become an owner of decentralized domain

HashEx run Passport

September 2019

Passport, your own digital id, a service fow sharing and validating personal or private data has launched.

check it

HashEx run decentralized DNS

August 2019

We are celebrating a launch of new decentralized domain name system called MNS.

check it

HashEx CEO becomes Minter Expert

July 2019

Dmitry Mishunin, HashEx CEO, was invited as an expert to Minter blockchain community.

HashEx CEO is on 16th SPb Blockchain Meetup

October 2018

Dmitry Mishunin, HashEx CEO, presented "Blockchain 4.0 Problems and Solutions" on 16th SPb Blockchain Meetup.

view video

Paper Wallet released

October 2018

We celebrate our long awaited Paper Wallet release. Paper Wallet is the safest way to store your seed phrase and private keys.

check it free

HashEx team celebrates delivery of the 150th smart contract audit!

August 2018

We are proud to present the anniversary smart contract audit which was done for Eristica company. You can read more about our audits on our Medium blog.

view article

HashEx announces partnership with #MetaHash

July 2018

We are excited to collaborate with #MetaHash team on development of a next-generation network based on Blockchain 4.0

view article

HashEx presents ABI encoder, a free product for Ethereum developers

April 2018

ABI Encoding Service helps you encode ABI parameters easily.

view article

HashEx CEO is the best speaker of DeCenter TokenConf

March 2018

Dmitry Mishunin, HashEx CEO, was ranked among the top 3 speakers on DeCenter TokenConf 2018 conference.

view video

Most popular article on HashEx Blog

January 2018

‘Top 16 ICO Whitepaper Mistakes’ was ranked the most popular article with 10 000 views on HashEx blog in 2017.

view article

Services

Blockchain Integration

We at HashEx develop concepts for blockchain integration into your business processes so that your company can gain competitive advantage on the market. Also, HashEx calculates the costs and profits of blockchain integration.

We have successful projects with remittance platforms, supply chains, real estate, healthcare, and digital rights distribution.

Project Audit and Due Diligence

HashEx provides a range of services to blockchain projects:

Analyzing your product
Blockchain solutions advising
Technical consulting
Token's economy creation
Whitepaper audit
Risks analysis

Blockchain Architecture and Development

We can build your own blockchain platform. We have extensive experience with running public and private blockchains, forking existing platforms and creating new architectures.

We use the following tech stack:

Java, C++, NodeJS
Web3.JS
Truffle and Open Zeppelin frameworks
Solidity smart contracts and DApps on Ethereum
Bitcoin, Ethereum, Graphene, Neo, Stellar, Cosmos Network blockchains
Off-chain solutions

Smart Contracts and Security Audit

HashEx team deployed more than 200 smart contracts. We audited
over 150 contracts and saved over $300 millions of investor funds.

We develop the following Solidity smart contracts:

Token contracts
ERC20/ERC223

DeFi custom contracts
Loans, Swaps, Margin

Custom contracts including
EOS, Neo and Stellar

Also we offer smart contract auditing for security risks, misbehavior, bugs and inefficiency.

Products

Hierarchical Deterministic (HD) Keys Library

HD Keys Library is a self-implemented library which allows to receive crypto payments in a secure way.

read a detailed post here

Library features:

Java application without untrusted dependencies
BIP32, BIP39, BIP44 support
RESTful API
Full and light client modes

Request a demo/quote

Online ABI Encoder^free

When you want to verify your Solidity Smart Contract's code on Etherscan.io or manually make a transaction to call your contract's method, you need to encode input arguments in a special way.

Free ABI Encoding Service from HashEx helps you encode these arguments online.

Check free ABI Encoder

Paper Wallet^free

Paper Wallet is the safest way to store your seed phrase and private keys. Our free solution allows to split your seed phrase into several pages which you can print out and keep separately.

read FAQ

Check free Paper Wallet

Customers

#MetaHash

HashEx collaborated with #MetaHash, a next-generation network based on Blockchain 4.0, on Yellow Paper, architecture of #TraceChain and #MetaApps, and audit of #MetaHash blockchain security.

"HashEx is a great team of professionals in blockchain that could be given really tough tasks and be sure they will help. It's extremelly rare that you can team up with an external team and get some load away from you main dev team, but with HashEx that's exactly the case."

Gleb Nikitin, Tech Lead and Co-founder of #MetaHash

#blockdeblock

For #blockdeblock, original cryptowear online store, HashEx developed blockchain-based Supply Chain Management System and created concept of BrandGuard® technology. We also developed frontend and backend for online store and integrated payment gateway with HD Keys Library to process payments in any cryptocurrency.

“HashEx covered the technical part of the project in full and let us concentrate on the business itself. With IT being the critical component in our business processes, our collaboration saved us a lot of time that we could invest into solving other important tasks.”

The #blockdeblock Team

Aggregion

For Aggregion, The Distributed Digital Object Governance Framework, we developed the concept of blockchain integration into their business processes. We advised on the most relevant blockchain platform for their goals and developed technical specification for the product prototype.