2026年版 Proton Driveの代替ツール
Proton Driveから乗り換える理由
価格に対してストレージ量が少ない — Googleが100GBを$2/月で提供する中、200GBで$4/月
Proton Drive free: Free 1GB (5GB with Proton account) | easy learning curve
Google Drive
15 GB free (shared with Gmail and Photos)何が違うのか: Anyone already in the Google ecosystem who wants seamless file storage tied to Docs, Sheets, and Gmail
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | Google Drive: Google One 100 GB $1.99/mo
Dropbox
2 GB free何が違うのか: Freelancers and small teams who need reliable file sync, sharing, and large file transfers
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | Dropbox: Plus $11.99/mo (2 TB)
OneDrive
5 GB free何が違うのか: Microsoft 365 users who want cloud storage that works seamlessly with Word, Excel, and Outlook
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | OneDrive: Microsoft 365 Basic $1.99/mo (100 GB)
Box
10 GB free (personal)何が違うのか: Enterprises that need bulletproof compliance, audit trails, and governance for regulated industries
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | Box: Business $15/user/mo
pCloud
10 GB free何が違うのか: Privacy-focused users who want a one-time lifetime payment instead of monthly subscriptions forever
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | pCloud: Premium 500 GB $49.99/year
Sync.com
5 GB free何が違うのか: Privacy-first teams that want zero-knowledge encryption included by default with no extra cost
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | Sync.com: Teams Standard $6/user/mo (1 TB)
Tresorit
Personal $11.99/mo (1 TB)何が違うのか: Businesses handling sensitive data that need Swiss-grade encryption and EU data residency guarantees
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | Tresorit: Personal $11.99/mo (1 TB)
MEGA
20 GB free何が違うのか: Users who want the most generous free encrypted storage without handing data to big tech companies
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | MEGA: Pro Lite $5.56/mo (400 GB)
iCloud
Free 5GB with any Apple ID何が違うのか: Apple users who want effortless backup and sync without thinking about it — it just works if you are all-in on Apple
料金比較: Proton Drive: Drive Plus $3.99/mo (200GB) | iCloud: iCloud+ 50GB $0.99/mo