iCloud vs Proton Drive——どっちが優秀？
iCloudを選ぶべき人: Apple全投入なら考えずに使えるバックアップとSyncが欲しいAppleユーザー
Proton Driveを選ぶべき人: Proton Mailを信頼済みで、同じZero-Knowledgeアプローチでファイルも暗号化したいプライバシー第一のユーザー
私たちの見解: iCloud for simplicity, Proton Drive for power users.
| iCloud | Proton Drive | |
|---|---|---|
| 料金 | Free 5GB with any Apple ID | iCloud+ 50GB $0.99/mo | Free 1GB (5GB with Proton account) | Drive Plus $3.99/mo (200GB) |
| 機能 | Seamless sync across iPhone, iPad, and Mac, iCloud Drive with Finder and Files app integration, Private Relay for anonymous web browsing (paid), Hide My Email for disposable addresses, Shared family storage with up to 5 members | End-to-end encrypted file storage and sharing, Zero-access encryption — even Proton cannot read your files, Built-in photo backup from mobile, Integrates with Proton Mail, Calendar, and VPN, Open-source clients audited by third parties |
| こんな人に最適 | Apple users who want effortless backup and sync without thinking about it — it just works if you are all-in on Apple | Privacy-first users who already trust Proton Mail and want their files encrypted with the same zero-knowledge approach |
| 学習コスト | 簡単 | 簡単 |
本当の違い
Both offer free tiers, so the real question is what you get when you start paying.
iCloud stands out with Seamless sync across iPhone, iPad, and Mac and iCloud Drive with Finder and Files app integration. Proton Drive counters with End-to-end encrypted file storage and sharing and Zero-access encryption — even Proton cannot read your files.
iCloud's Achilles heel: terrible experience on windows and android — and 5gb free in 2026 is embarrassingly stingy. Proton Drive's: storage amounts are small for the price — 200gb for $4/mo when google gives you 100gb for $2/mo. Pick whichever weakness you can live with.
結論
If you value seamless sync across iphone, ipad, and mac and apple全投入なら考えずに使えるバックアップとsyncが欲しいappleユーザー, go with iCloud. If proton mailを信頼済みで、同じzero-knowledgeアプローチでファイルも暗号化したいプライバシー第一のユーザー matters more, Proton Drive is your pick. Neither is a bad choice — but one will fit your workflow better.