Postchain is the first true relational blockchain. It is open-source, and works together with the most widely used database systems.
Many database systems have been around for years and are trusted in production by enterprises around the world. This means that with Postchain, a blockchain solution can be implemented by a SQL developer.

There is no need for specialized blockchain developers or an experimental codebase.
Postchain has been built from the ground up with relational blockchain architecture.


Empowers SQL developers to become blockchain developers.


Don't trust your consortium members, validate.


Postchain is a general framework that allows you to create your application on top of it.


Postchains SQL based language and transaction system is easy to work with.


Postchain is based on mature database technology that is well tested.


Postchain was created as an enterprise solution, built for ease of integration and scalability.


The core of Chromia is Postchain, so as a developer you enjoy the benefits of both a blockchain and a relational database. This means that decentralized applications (dapps) can be written in a way that is familiar to developers all over the world, whether they work on large enterprise applications, games, or smaller projects.

Why is relational blockchain so good for decentralised applications? All applications need a way to store and handle application data - in other words, a database. Relational databases are considered to be best in class for flexibility, versatility and consistency. By delegating blockchain logic and storage to a relational database management system, a relational blockchain narrows the gap between conventional and decentralised applications, offering developers and end users a truly high quality experience.

A fully fledged blockchain with complex operations, ad-hoc queries, and a developer-friendly programming model built-in.
Chromia takes full advantage of the tools which already exist to deliver the most practical and usable dapp platform out there.

  Mainstream Scale

  Horizontal scaling with sidechain sharding.
  High performance queries and transaction processing.
  Flexible governance.

  Powerful Programming

  Familiar data model.
  Ad-hoc queries and complex constructs.
  Type-safe interpreted programming language called Rell.

  Encompass Virtual Worlds

  Enough processing power to run blockchain native MMOGs.
  Interchain asset and data transfer.
  Dapp level provisioning with total liberty to customise economic model.

Esplix smart contracts

Esplix is a client-side validated, private, blockchain-agnostic smart contracting system. A blockchain is a distributed replicated state machine which allows a network of peers to update the shared state in a safe and predefined way. What if you want to have the same immutability and integrity guarantees as a blockchain, but without the need to share all information with all network participants?

Esplix provides a solution to this case by using the blockchain as a data store for a state object (contract), and using cryptography to update and validate the state of a contracts on the client-side. This means that contract instances can be kept private to those participating in it, while still offering the kind of definitive proofs we expect from a blockchain.