Blockchain is a way of maintaining a shared record across multiple participants. It can be useful in some applications, but it is not automatically better than a conventional database.

Scalability

Some blockchain networks process transactions more slowly or at lower throughput than centralized systems. Performance varies significantly according to the network design and consensus mechanism.

Energy Use

Proof-of-work networks can require substantial computing power and electricity. Other consensus mechanisms use different approaches and should not be assumed to have the same energy profile.

Transaction Costs

Fees can rise when some public networks become congested. Costs depend on the blockchain and the demand for its limited processing capacity.

Privacy

A distributed ledger can make records difficult to alter, but that does not mean all blockchain data is private or anonymous. Public ledgers may expose transaction histories even when identities are represented by addresses.

Governance and Errors

Decentralized systems can make upgrades, dispute resolution and correction of mistakes complicated. Smart-contract errors can also create risks when software controls valuable assets.

Choosing the Right Tool

Organizations should compare blockchain with conventional databases according to the actual problem, trust model, performance needs, costs and regulatory requirements.