Open-sourcing is important to Hedera because it creates transparency in Hedera’s network services codebase, applications, development tools, and the engineers working day-to-day behind the scenes. Hedera believes that by having open-sourced its network services, we empower the community to become more involved in developing the Hedera network. You can read more about the open sourcing of Hedera services in this blog posting.
In addition to the Hedera codebase and developer ecosystem tools being open source, the hashgraph platform is available as open review. The hashgraph consensus platform source code is available for anyone to read, recompile, and verify that it is correct. Hedera has the exclusive right to run a public distributed ledger network using hashgraph consensus.
The hashgraph consensus platform code has been audited by multiple code audit firms. The audit from FP Complete for the hashgraph consensus platform code, as well as the COQ proof from Carnegie Melon, are made available on the 'Audits and Standards' page: https://hedera.com/audits-and-standards