Private alternatives to Outlook

Tuta Calendar

Service

German calendar app that encrypts every event detail, times included, with a free plan.

• No tracking
• Open source
• End-to-end encrypted
• Account needed
• Free plan

Proton MailAudited

Service

Swiss email where your mailbox is encrypted so the provider can't read it, with apps on every platform.

• Minimal tracking
• Partly open
• Partly encrypted
• Account needed
• Free plan

Tuta

Service

German email and calendar that encrypt the whole mailbox, including subject lines and contacts.

• No tracking
• Partly open
• End-to-end encrypted
• Account needed
• Free plan

mailbox.org

Service

Long-running German email provider with calendar, drive and optional PGP encryption, paid for by its users.

• No tracking
• Closed source
• Partly encrypted
• Account needed
• €1/month billed yearly

Fastmail

Service

Fast, ad-free email with calendar and masked addresses; paid for by subscriptions rather than ads.

• Tracking not stated
• Closed source
• Provider can read it
• Account needed
• $5/month billed yearly

Thunderbird

App

Free desktop and Android mail app from the Mozilla family that works with any provider and supports OpenPGP.

• Minimal tracking
• Open source
• Stays on device
• No account
• Free