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Web clients

This project is a monorepo hosting the proton web clients. It includes the web applications, their dependencies & shared modules as well as all tooling surrounding development of the web clients (as well as some additional miscellaneous things).

  • ProtonMail
  • Proton Calendar
  • Proton Drive
  • Proton Account
  • ProtonVPN Account

Technically, this monorepo is based on Yarn 2 & Yarn Workspaces, with unified versioning for all packages inside.

Getting Started

You'll need to have the following environment to work with this project

  • Node.js LTS
  • Yarn 2
  • git
# Clone the project
git clone
git clone

# Install all dependencies for the entire monorepo & symlink
# local dependents to one another
yarn install

# Run web clients by running proton-<package-name>
# Example: proton mail web client
yarn workspace proton-mail start

For additional details on how to interact with the monorepo, see the yarn docs for reference.

Help us to translate the project

You can help us to translate the application on crowdin.


The code and data files in this distribution are licensed under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. See for a copy of this license.

See LICENSE file