What is a mainnet?

Think of the difference between a test order on an online store and a real purchase: with the second, the money actually leaves your account. That’s roughly what separates a mainnet from a test network (testnet). On a testnet, developers try out features, usually with test coins that have no monetary value. On the mainnet, transfers and fees involve real assets.

When you send crypto on the mainnet, the transaction is broadcast to the network’s nodes. It’s checked against the blockchain’s rules and, if valid, can be included in a block. Depending on the consensus mechanism, miners or validators take part in producing blocks. Bitcoin and Ethereum, for example, each have their own mainnet.

Why it matters

For crypto users, the key difference is that on the mainnet, actions have real financial consequences. Sending coins, making a swap or running a smart contract can move funds and require a network fee. There’s no reset button like in a software test.

When a project announces its mainnet launch, it’s saying its main network is going live. We see that as a meaningful technical step, not a certificate of success. It doesn’t by itself prove that the network is secure or decentralized, or that it has real usage. Also, a token may circulate on another blockchain before the project gets its own mainnet.

What to watch out for

The right address isn’t enough if you’ve chosen the wrong network. Before a transfer, check that the recipient’s wallet or exchange supports that specific network. The same address format can be used on different blockchains, which doesn’t mean a mistaken deposit will be recovered easily, or at all.

If a mainnet launch comes with a token migration to the new network, the process isn’t necessarily automatic. Check the official instructions from the project and from the provider where you hold your tokens. Never enter your seed phrase (recovery phrase) on a website that promises “mainnet activation.”