Cosmos, founded by Jae Kwon and Ethan Buchman, launched with an ambitious vision: rather than building one blockchain to rule them all, create a framework for building interconnected, sovereign blockchains. The “Internet of Blockchains” metaphor captures the idea — just as the internet connects independent networks, Cosmos connects independent blockchains through the Inter-Blockchain Communication (IBC) protocol.
The Cosmos SDK — a modular framework for building application-specific blockchains — became one of the most influential pieces of infrastructure in crypto. Major blockchains built with the Cosmos SDK include the Binance Smart Chain (BNB Chain), Cronos (Crypto.com), THORChain, Osmosis, Celestia, dYdX (which migrated from Ethereum to its own Cosmos chain), Injective, Sei, and Kava. Each is a sovereign chain with its own validators, governance, and tokenomics, but all can communicate through IBC.
IBC is Cosmos’s killer feature. Launched in 2021, IBC enables trustless cross-chain token transfers and message passing without bridges — which are historically the most hacked components in crypto. By 2024, IBC had facilitated billions in cross-chain transfers across 100+ connected chains with zero exploits of the protocol itself. This security record stands in stark contrast to the billions lost through bridge hacks (Ronin, Wormhole, Nomad).
The ATOM token — Cosmos Hub’s native token — has had a more complicated journey. Unlike Ethereum’s ETH (which is required for every Ethereum transaction), ATOM’s value proposition within the Cosmos ecosystem isn’t always clear. Individual Cosmos chains use their own tokens for gas and security. Proposals like “interchain security” (where Cosmos Hub validators also secure smaller chains) attempted to give ATOM more utility, but adoption has been gradual. The result is a paradox: Cosmos technology is enormously successful and widely used, but the ATOM token hasn’t captured proportional value. The Cosmos ecosystem thrives; the Cosmos Hub struggles to define its role within it.
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