# Tally architecture {% embed url="" %} Tally is built on top of the [Governor standard](https://docs.openzeppelin.com/contracts/4.x/governance). Tally indexes the on-chain data from and enables users to make calls to Governor smart contracts running autonomously on the blockchain. To be compatible with the Tally app, we recommend you use OpenZeppelin's [Governor contract](https://docs.openzeppelin.com/contracts/4.x/api/governance). This modular, battle-tested system of organization smart contracts gives token holders control of their organization on-chain. A typical Governor organization uses three contracts: a token contract, a Governor contract, and a timelock contract.
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