Gmail 代替ツール比較
8サービスを4軸で評価。総合点の高い順に並べています。詳細は各ツールページへ。
| ツール | プライバシー | 使いやすさ | 機能の豊富さ | コスパ | 総合 |
|---|---|---|---|---|---|
| Proton Mail | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 16/20 |
| Tutanota | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 16/20 |
| Fastmail | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 18/20 |
| Migadu | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 15/20 |
| Mailbox.org | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 16/20 |
| Posteo | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 17/20 |
| Skiff | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 14/20 |
| iCloud Mail | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | 17/20 |
詳細比較マトリクス
| 項目 | Proton Mail | Tutanota | Fastmail | Migadu | Mailbox.org | Posteo | Skiff | iCloud Mail |
|---|---|---|---|---|---|---|---|---|
| 料金 | Free + paid | Free + paid | Paid | Paid | Paid | Paid | Free + paid | Free + paid |
| 難易度 | Easy | Easy | Easy | Moderate | Moderate | Easy | Easy | Easy |
| OSS | ✓ | ✓ | — | — | — | — | — | — |
| データ保存 | Switzerland (Proton data centers; Swiss federal jurisdiction). | Germany (all data in German data centers). | Australia, US, and Netherlands (selectable by plan). | Switzerland (Migadu infrastructure). | Germany (Berlin-area data centers). | Germany (Berlin). | United States (former Skiff infrastructure). | Apple global data centers; with Advanced Data Protection, user-held keys mean Apple cannot decrypt mail. |
| Privacy | 5/5 | 5/5 | 4/5 | 4/5 | 5/5 | 5/5 | 4/5 | 4/5 |
| Ease of use | 4/5 | 4/5 | 5/5 | 3/5 | 3/5 | 4/5 | 4/5 | 5/5 |
| Features | 4/5 | 3/5 | 5/5 | 3/5 | 4/5 | 3/5 | 4/5 | 4/5 |
| Value | 3/5 | 4/5 | 4/5 | 5/5 | 4/5 | 5/5 | 2/5 | 4/5 |
総合ランキング
- 1 Fastmail
Full IMAP productivity email
18 /20 - 2 Posteo
Anonymous, sustainable email from Berlin
17 /20 - 3 iCloud Mail
Seamless mail for the Apple ecosystem
17 /20 - 4 Proton Mail
Swiss zero-access encrypted email
16 /20 - 5 Tutanota
German encrypted mail—including subject lines
16 /20 - 6 Mailbox.org
German privacy mail with office tools
16 /20 - 7 Migadu
Best value custom-domain email
15 /20 - 8 Skiff
Pre-acquisition E2EE suite—not for new users
14 /20