Orca Crypto
Technology term

Appchain

A blockchain dedicated to a single application.

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Updated 2026-08-303 min readDefinition
Definition

A blockchain dedicated to a single application.

An appchain gives one application its own block space, so it never competes for capacity and can customize gas, governance and validator rules.

The cost is bootstrapping: security, liquidity and users all have to come from somewhere, which is why most appchains now launch as layer 3s instead of standalone chains.

In practice

dYdX moved from a rollup to its own Cosmos chain to control its order book fully.

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