NXT is an open source[citation needed] cryptocurrency and payment network launched in 2013 by anonymous software developer BCNext.[1] It uses proof-of-stake to reach consensus for transactions—as such, there is a static money supply. Unlike Bitcoin, there is no mining.[2][3] NXT was specifically conceived as a flexible platform around build applications and financial services, and serves as basis for ARDR (Ardor), a blockchain-as-a-service multichain platform developed by Jelurida, and IoTeX (cryptocurrency)[4] the current steward of NXT as of 2021.[5] NXT has been covered extensively in the "Call for Evidence" report by ESMA.[6]

Signum (formerly Burstcoin) is a cryptocurrency that was created in 2014. It originated as a fork of the NXT blockchain and its codebase. It is based on the Proof-of-Capacity (PoC) consensus algorithm, which allows users to participate in mining using their hard drive space instead of computing power. This makes it more accessible and environmentally friendly compared to other cryptocurrencies that rely on Proof-of-Work (PoW). In 2020, the Burstcoin community rebranded the coin to Signum as part of a larger effort to expand its reach and improve its technology. The project continues to be actively developed and has a strong community of supporters.