Cosmos (ATOM) is a decentralised ecosystem of interoperable blockchains, built around the vision of becoming the “Internet of Blockchains.” Founded by Jae Kwon and Ethan Buchman and launched in 2019, Cosmos provides developers with the tools to build sovereign, customisable blockchains that communicate with each other via the Inter-Blockchain Communication (IBC) protocol — a standardised messaging system enabling trustless token transfers and data sharing between any IBC-enabled chain.
Core components: Tendermint BFT — a battle-tested consensus engine providing instant finality; Cosmos SDK — a modular framework for building blockchains quickly, used by hundreds of projects including dYdX, Osmosis, and Injective; IBC protocol — the cross-chain communication standard now connecting 100+ chains; and Interchain Security — allows new chains to borrow the Cosmos Hub’s validator set. The ATOM token secures the Cosmos Hub via Proof of Stake and is used for governance. Notable ecosystem chains include Osmosis (leading Cosmos DEX), dYdX (perpetual trading), Celestia (modular data availability), and Injective (AI-focused DeFi). Cosmos’ architecture has become a template for the “modular blockchain” movement — where chains specialise rather than trying to do everything.
Example: A user holds ATOM, bridges it via IBC to Osmosis, swaps for another token, then bridges to a third Cosmos chain — all without a centralised exchange, in minutes.
Learn more: Cosmos — Learn FAQ
