Our Products

Discover our remarkable products you can fork and build on, or just use right now!


Order book infrastructure can be difficult to maintain or scale efficiently—especially for developers unfamiliar with blockchain technology—and OpenRelay aims to make the challenge easy to operationalize. Built on a powerful open source microservice architecture that makes finding orders and filling them via the 0x Protocol fast and efficient at any scale. Want to see how it works? Check it out on Github!


The Ether Cattle Initiative is a project to reduce the operational complexity of managing Ethereum clients at the scale required of a dApp with lots of moving parts (specifically OpenRelay).

Want to see how it works? Check it out on Github!

Other Projects

Discover our previous projects.


Embiggen (MBGN) is the ERC20 token that grows in your wallet! It offers a way to introduce new tokens by providing it to all MBGN holders at once, proportionally to the amount of MBGN they hold (at a rate of 10% per annum, compounded hourly). You can think of it like a stock split; the total supply of the token is increased while each holder's share of the pie stays the same size.


NotCoin is an ERC20 token that enables "one-sided" exchanges. In other words, if you want to use an exchange contract to offer a token (such as Embiggen) without asking for a different token in return, NotCoin gets the job done. Open Relay invented NotCoin to facilitate the Embiggen Airdrop, because we literally wanted to give away Embiggen. Hypothetically though, it could be used in any exchange where a token is being offered in exchange for something other than a token (like payment via fiat currency, for example).

Embiggen Airdrop

We developed the Embiggen Airdrop dApp to enable users to claim Embiggen. The dApp is meant to prepare people for token trading by walking them through the process of setting up a web3 enabled browser, acquiring the necessary ETH, and claiming Embiggen in just a few easy steps. By the time they have claimed some Embiggen, they have everything they need to get deeper into the decentralized trading ecosystem.

Affiliate Portal

The OpenRelay Orderbook Affiliate Portal dApp is a GUI-driven gateway that developers can use to 1) sign up for the OpenRelay Orderbook Affiliates Program, and 2) view and redeem fees shared when affiliate-created dApps generate fees (we share 80% of fees generated by affiliates, with affiliates). The dApp allows developers to sign up, and then once they do, provides a dashboard interface to view and redeem fees. Simple, no?


Fling is a dApp for sending tokens to a lot of different addresses at once in just two transactions. The smart contract powering Fling was originally created to help us prepare for the Embiggen Airdrop, but after others expressed interest in a GUI-driven interface to the contract's functionality, we created the Fling dApp. More a love letter to the Ethereum community than a product, Fling demonstrates what is possible when clever smart contracts meet easy-to-use interfaces.


A set of CLI tools for interacting with OpenRelay (and other 0x relayers) at scale. Make orders, sign hashes, and more! Available in Linux or Mac flavors.

Get in Touch

To find out more about OpenRelay and what we do, please don’t hesitate to contact us.