workflowstacks
local-ai

Secure Email with Tutanota

Encrypt emails, contacts, and calendar entries for enhanced privacy. For founders needing secure communication, backed by 7.7k+ GitHub stars.
beginner⏱ 5 minutesπŸ’΅ Free (self-hosted)
7,986 stars+14β˜… this week644 forksTypeScriptGuide quality 9/10 Β· reviewed Jun 29Updated 10/9/2026100% free Β· open source
What it is

Encrypts emails and contacts directly in your email service.

Real use case example

"A founder wants to protect sensitive customer information in their email threads. They enable encryption on their Tutanota email service. When a new email contains a password reset link, it's automatically encrypted on all devices. The founder can rest assured that customer data remains secure."

Best insideAny AI Client
When to use it
  • β€’When communicating sensitive business information via email
  • β€’When needing to securely store and manage contacts and calendar entries
  • β€’When requiring a high level of privacy and security for business communications
Ready-to-paste prompt
Use the Tutanota API to send an encrypted email: 'curl -X POST -H "Content-Type: application/json" -d "{\"to\": \"recipient@example.com\", \"subject\": \"Test Email\", \"body\": \"Hello World!\"}" https://localhost:4242/rest/tutanota/send'
Heads up: Tutanota requires a self-signed SSL certificate to be trusted in the browser, which may trigger security warnings; to avoid this, use a trusted certificate or add an exception in the browser
Saves to your device
Use with Claude
New

Skip the builder β€” one click puts this in Claude, Cursor, Antigravity and more.

πŸ› οΈ Technical setup

Expect 20–40 minutes in a terminal β€” or let your AI agent drive it.

Try it instantly β€” no install
Claude Code
mkdir -p ~/.claude/skills/tutanota && curl -fsSL https://workflowstacks.com/api/skills/tutanota/claude-skill -o ~/.claude/skills/tutanota/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go β€” no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Secure Email with Tutanota works
Codeflow
Free to inspect

Secure Email with Tutanota is a very large TypeScript project (~521k lines across 2386 code files, plus 367 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, GPL-3.0 license, has a test suite.

Size
Very large codebase
~521k lines Β· 2386 code files Β· days to read β€” use, don't read
Setup
Developer setup
A real software project. Use it via its install path; don't expect to read it all.
Runs on
Node.js
No API keys detected
TypeScript 60%C 29%Rust 4%JavaScript 3%Kotlin 2%
Where to start reading
  1. 1
    README.md
    Start here β€” what it does and how to install it
  2. 2
    Cargo.toml
    Dependencies and the commands it exposes
  3. 3
    src/usagetests/index.ts
    Inside src/ β€” the main logic begins here
What's in each folder
src/Core code β€” the actual logic1748 files
doc/Documentation8 files
app-android/Folder727 files
app-ios/Folder486 files
tuta-sdk/Folder172 files
ipc-schema/Folder100 files
resources/Folder85 files
buildSrc/Folder53 files
READMEHas testsDocumentedCI checksGPL-3.0 licenseUpdated this month
Quick Actions
Details
Creator
tutao
Language
TypeScript
Category
local-ai
Published
7/28/2014

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Show it off in your README:

Featured on WorkflowStacks
[![Featured on WorkflowStacks](https://workflowstacks.com/api/badge/tutanota.svg)](https://workflowstacks.com/skills/tutanota?utm_source=github&utm_medium=badge)
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