Cosmos is often called “the internet of blockchains”: a network of independent chains that can exchange tokens and data with each other. At the centre of this ecosystem sits the Cosmos Hub, the first blockchain launched with the Cosmos technology and the home of the ATOM token. This beginner’s guide explains what the Hub does, how ATOM is used and which numbers help you understand the health of the network.
The Idea Behind Cosmos
Most early blockchains tried to run every application on one shared network. That approach leads to congestion and high fees when one popular app crowds out the rest. Cosmos takes a different path. It gives developers a toolkit to build their own application-specific blockchains — so-called app-chains — and a protocol to connect them. Each chain has its own validators, rules and token, but all of them can talk to each other.
The Technology Stack
| Component | Role |
|---|---|
| CometBFT (formerly Tendermint) | Consensus engine: validators agree on blocks with fast finality |
| Cosmos SDK | Framework with ready modules for staking, governance, accounts and more |
| IBC | Protocol for moving tokens and messages between chains |
Thanks to CometBFT, blocks on Cosmos chains are final as soon as they are committed — there is no waiting for extra confirmations. The Cosmos Hub produces a new block every few seconds; the explorer recorded an average block time of about 7 seconds in 2022. You can follow block production in our Blocks section.
What the Cosmos Hub Does
The Hub is not the only chain in Cosmos, and it does not control the others. Its role has evolved over time:
- Security provider. Through Interchain Security, the Hub’s validators can also secure “consumer” chains, which share their fees with ATOM stakers.
- Interchain router. As one of the most connected chains, the Hub is a natural route for tokens moving across the ecosystem.
- Governance forum. ATOM holders decide on upgrades, parameters and spending from the community pool. See our Governance section.
The ATOM Token
ATOM has three main uses:
- Staking. Holders delegate ATOM to validators, who use it as collateral to secure the network. Delegators earn a share of rewards.
- Governance. Staked ATOM gives voting power on proposals.
- Fees. Transactions on the Hub are paid in ATOM and other approved tokens.
New ATOM is issued as staking rewards. The inflation rate adjusts automatically: it rises when too little of the supply is staked and falls when the staked share is above the target. In October 2022, for example, Cosmoscan recorded a bonded ratio of about 67.8% and an inflation rate of about 12.9%.
Key Metrics to Follow
| Metric | Why it matters |
|---|---|
| Bonded ratio | Share of ATOM staked; higher means more security and fewer liquid tokens |
| Inflation rate | How fast new ATOM is created |
| Top-20 voting power | Concentration of stake among the largest validators |
| Community pool | Funds available for ecosystem grants via governance |
| Transfer volume | How actively ATOM is used on-chain |
The home page of Cosmoscan shows a snapshot of these figures together with daily charts of transfer volume and bonded ratio.
Staking: The Basics
To stake, you choose a validator and delegate tokens from your wallet. Your ATOM never leaves your control, but it is locked while staked. If you decide to unstake, there is an unbonding period of 21 days during which tokens earn no rewards and cannot be transferred. If your validator misbehaves — for example, by signing two different blocks at the same height — part of the delegated stake can be slashed. Choosing well is therefore important; read How to Choose a Cosmos Validator before you delegate.
The Wider Ecosystem
Dozens of chains are built with the Cosmos SDK and connected by IBC: exchanges like Osmosis, NFT platforms like Stargaze, music networks like BitSong, data-availability layers like Celestia and many more. Even chains outside Cosmos have adopted IBC connections. Learn how this works in IBC Explained.
“Cosmos does not ask every application to live on one chain. It lets each one have its own and connects them all.”
Conclusion
The Cosmos Hub is the anchor of an ecosystem built on sovereignty and interoperability. ATOM secures the network, gives holders a voice in governance and pays for transactions. If you want to understand the ecosystem, start with the data: validator performance, staking levels, governance activity and on-chain transfers — exactly what Cosmoscan was created to show.