Each blockchain in Cosmos is powered by a decentralized network of independent parallel blockchains. Tendermint consensus algorithms are examples of consensus algorithms. Cosmos is an ecosystem of blockchains that can scale and communicate with one another. The blockchains used to be siloed and could not communicate with each other before Cosmos. There was a lot of work involved in building them, and they were only capable of handling a small number of transactions per second. In Cosmos, these problems are solved with a new technology vision.
https://cosmos.network/

Cosmos (ATOM) is a cryptocurrency that serves as the native token of the Cosmos Network, a decentralized blockchain platform. Launched in 2019, Cosmos aims to address interoperability issues among different blockchains, allowing them to communicate and share data seamlessly. ATOM holders participate in the network's governance and consensus mechanisms, securing the system. Cosmos employs the Tendermint consensus algorithm, enhancing scalability and speed. With a focus on fostering an interconnected blockchain ecosystem, Cosmos enables the creation of sovereign blockchains, known as zones, while ensuring secure communication and collaboration between them, ultimately promoting a more scalable and interoperable blockchain landscape.