**Public blockchains are decentralized**, allowing anyone to join and participate in the network, whereas private blockchains are controlled by a single organization.
**Public blockchains are open-source**, providing open access to everyone, whereas private blockchains are permissioned, establishing rules governing who can see and write to the chain.
**Public blockchains have fewer transactions per second** compared to private blockchains, making them less scalable.
**Private blockchains provide absolute privacy**, making them attractive to enterprise companies that require secure data management.
**Public blockchains are driven by the core tenets of decentralization**, whereas private blockchains have a clear hierarchy of control, making them not decentralized.
**Permissioned blockchains are a hybrid of public and private blockchains**, where anyone can access them as long as they have permission from the administrators.
**Private blockchains are more vulnerable to hacks and data breaches**, as they are controlled by a single organization, making them more susceptible to attacks.
**Public blockchains have a higher transaction cost** compared to private blockchains, due to the enormous number of nodes on the platforms.
**Private blockchains are more centralized** than public blockchains, as they are controlled by a single organization.
**The order of magnitude of a public blockchain is lesser than that of a private blockchain**, as it is lighter and provides transactional throughput.
**Public blockchains are designed to work in a trustless environment**, whereas private blockchains rely on trusted nodes.
**Public blockchains work because anyone can verify its transactions**, whereas private blockchains rely on trusted nodes to verify transactions.
**Private blockchains are more scalable** than public blockchains, as they have fewer nodes to verify transactions.
**Public blockchains are more secure** than private blockchains, as they have a larger number of nodes verifying transactions.
**The main difference between public and private blockchains is the level of access granted to participants**, with public blockchains being completely open and private blockchains being permissioned.