Summa Auctions


Summa is the world’s only provider of cross-chain auctions. Auctions represent an evolution in cryptocurrency markets featuring fast on-chain settlement, trustless and non-custodial transactions, and smaller fees than traditional exchanges.

During our series of bi-weekly cross-chain auctions (held every other Thursday), participants have the opportunity to purchase ETH using BTC.

Summa’s auctions are the fastest and most secure way to buy Ether and participation is open to anyone interested in cryptocurrency with no sign up necessary!

Riemann Toolkit

Open Source
Multi-chain Support
Simple Interface

Riemann is an open source toolbox for application development on Bitcoin and dozens of other UTXO-based blockchains. Riemann makes it easy to build application-specific transactions and supports dozens of chains.

Every significant Bitcoin-based chain is a first-class citizen. This includes mainnets and testnets for Bitcoin, Zcash, Bitcoin Cash, Decred, Litecoin, and many more. We built Riemann to be the tool we need. We’ll be using it in production, and hope others will too.

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