1Password is a Canadian-developed password manager that creates, stores, and autofills strong passwords and other sensitive data in an encrypted, virtual vault for personal and business use across multiple platforms. Key features include secure password generation and sharing, cross-device synchronization, and features like Watchtower for monitoring compromised accounts and Privacy Cards for secure virtual credit cards. 1Password utilizes end-to-end encryption with a zero-knowledge architecture to ensure only users can access their vault's contents, providing secure vaults for individuals, families, and businesses.