Big Tech platforms analyze emails, personalize ads, and create profiles but Tuta Mail is different. With Tuta, security isn’t optional, it’s built-in, and the usability is still great.”
Digitally Sovereign
Email, Calendar
and Drive
安全 オープンソース 環境保護
ドイツで生まれ、ドイツで管理
Tuta owns the servers that are located in ISO 27001 certified data centers in Germany. Ensuring zero dependence on non-European cloud providers.
10,000を超える企業・組織が利用
From freelancers to large enterprises, over 10,000 businesses trust Tuta to keep their communications private and compliant.
耐量子暗号（PQC）対応
Thanks to its quantum-secure cryptography and zero-access architecture, Tuta is the best solution to keep your data safe.
GDPRに準拠
With full GDPR and GoBD compliance, Tuta has the highest security and compliance standards – without additional tools or complex configuration.
デジタル主権を尊重したツール
ドイツ生まれのTutaメールはデジタル主権を尊重したサービスで、TutaカレンダーやTutaドライブと連携して、あらゆるビジネスをサポートします。耐量子暗号（PQC）対応でデータを守る堅牢なサービスです。
ゼロ知識暗号化： エンドツーエンド暗号化により、データ主権を完全に確保
ドイツ国内で100％管理 すべてのデータは暗号化され、ドイツ国内にあるISO27001準拠のデータセンターで管理
GDPR（EU一般データ保護規則）に完全準拠： すべてのデータはドイツ国内のみで処理・管理
米国CLOUD法の適用外： 第三国へのデータ転送や法的なグレーゾーンは一切なし
完全なデータ主権： Tutaは、米国の各種サービスに依存しない ISP（インターネットサービスプロバイダ）を自主運用
全プランで広告の非表示： プロファイリングや追跡（トラッキング）も一切なし
Trusted by
It’s a lawyers duty to ensure that the client is not put at risk to data leaks or unintentional access of data. This can only be ensured through encrypted communication like Tuta Mail.”
MATTHIAS BAENZ,
TAX LAWYER
Tax lawyer, Matthias Baenz on security, responsibility, and client trust.
Tuta Mail is a simple, straightforward system that allows us to communicate with everybody in encrypted form. This creates a general feeling of reassurance for our organization.”
MICHAEL KRAUSE, MNG. DIR.,
JUGENDHILFE BOCKENEM
Why Jugendhilfe Bockenem with its 170 employees chose Tuta Mail to …オールインワン： 安全なメール、
カレンダー、ドライブ
通信やファイルを、可能な限り安全な方法で保存・管理しましょう：量子耐性暗号化で保護されています。ビッグテックによる監視から自由になり、プライバシーを有効にしましょう！
創業当初よりデジタル主権を提唱
Tuta was launched in 2014 in Hanover, Germany, as the first end-to-end encrypted email provider. Since then, Tuta has pushed the boundaries for secure, sovereign communication, becoming an established European alternative to Big Tech communication platforms. Today, Tuta enables over ten thousand businesses to be digitally sovereign. By combining quantum-resistant encryption with strict location policies, Tuta makes sure your business data is stored securely and inline with your business and data protection guidelines.
Digital Sovereignty FAQ
「デジタル主権」とは？
Digital sovereignty means to keep sensitive information protected while allowing organizations to have full control over the storage and processing of their data. A business or organization is digitally sovereign when it has full command of its data, software, and infrastructure without dependence on foreign tech giants.
Why digital sovereignty matters for business email?
Digital sovereignty is important for business emails because it means that sensitive communications are not accessible to third-parties like US tech monopolies. If a business does not use digitally sovereign solutions like Tuta Mail for business email, confidential communications become vulnerable to third-party access and surveillance.
Why is end-to-end encryption the key technology for digital sovereignty?
End-to-end encryption is a requirement for businesses to achieve digital sovereignty because it ensures that company data, for example email communications, cannot be accessed by third parties. It is the responsibility of all businesses to ensure that communications are private and confidential. This can only be achieved by using end-to-end encrypted email providers like Tuta Mail.