Microsoft OneDrive

Dropbox

Dropbox is a cloud storage and file synchronization service that keeps files up to date across all of a user's devices and makes sharing large files with others simple via shareable links. It was one of the earliest mainstream cloud storage products and remains widely used for its reliability. Smart Sync lets users see and access all their files without needing to download everything locally, saving disk space while still providing quick access when a file is opened. Dropbox Paper offers lightweight collaborative document editing alongside file storage. Dropbox Dash adds AI-powered universal search across connected apps and cloud storage, helping users find files, links, and documents scattered across many different tools from a single search bar.

Box

Box is a cloud content-management platform focused on enterprise security, compliance, and workflow, rather than just consumer file sync. It emphasizes governance, permissions, and integrations for business.

Google Drive

Google Drive is Google’s cloud storage service, deeply integrated with Docs, Sheets, and Gmail, offering generous free storage and seamless collaboration. It is a default for individuals and Workspace users.

spacedrive

Spacedrive is a native, local‑first file explorer that unifies internal drives, external disks, network shares, and cloud accounts into a single virtual distributed filesystem. It indexes the storage you already own, letting you browse, tag, and organise files without worrying about which machine they physically reside on. Built with Rust for Windows, macOS, and Linux, Spacedrive runs entirely on your own hardware—no hosted backend, no accounts, and no subscription. The open‑source core is free, while the 2.0 rewrite is sold as a one‑time purchase, giving you a polished desktop experience with ongoing updates.