Cosmos

Cosmos bills itself as "the Internet of Blockchains," a decentralized network of independent, parallel blockchains that can communicate with each other. Co-founded by Jae Kwon and Ethan Buchman, Cosmos launched its mainnet in March 2019 with a vision of making it easy to build and connect purpose-built blockchains rather than forcing everything onto a single chain.

The ATOM token is the native staking token of the Cosmos Hub, the first blockchain in the Cosmos network. Validators stake ATOM to secure the Hub and process transactions, while delegators can stake their ATOM with validators to earn a share of block rewards. ATOM also plays a role in governance, letting holders vote on proposals that shape the network's direction.

Two core technologies power the Cosmos ecosystem. The Tendermint consensus engine (now CometBFT) provides fast, Byzantine fault-tolerant consensus that any blockchain can use. The Cosmos SDK is a modular framework that makes building application-specific blockchains dramatically simpler. Together, these tools have enabled dozens of major projects, including Binance's BNB Chain, Cronos, Osmosis, and the Terra ecosystem.

The Inter-Blockchain Communication (IBC) protocol is what ties the Cosmos ecosystem together. IBC enables different blockchains to transfer tokens and data between each other trustlessly, without relying on bridges or wrapped tokens. Over 100 blockchains have connected via IBC, processing millions of cross-chain transfers. This approach of sovereign, interoperable blockchains represents a fundamentally different scaling philosophy than monolithic chains, and Cosmos infrastructure now underpins a significant portion of the broader crypto ecosystem.