Versions:

  • 3.8.0
  • 3.7.0
  • 3.6.0
  • 3.5.0
  • 3.4.0
  • 3.3.1
  • 3.3.0
  • 3.2.0
  • 3.1.0
  • 3.0.0
  • 2.10.0
  • 2.9.0
  • 2.8.0
  • 2.7.0
  • 2.6.0
  • 2.5.0
  • 2.4.1
  • 2.4.0
  • 2.3.0
  • 2.2.2
  • 2.2.1
  • 2.2.0
  • 2.1.1
  • 2.1.0
  • 2.0.0
  • 1.11.0
  • 1.10.0
  • 1.9.13
  • 1.9.12
  • 1.9.11
  • 1.9.10

proton-cli is an unofficial, end-to-end encrypted command-line interface for the Proton suite of services, published by Roman-16 and currently available at version 3.8.0, with a total of 31 versions released over the course of the project's history. The software provides terminal-based access to Proton Mail, Proton Drive, Proton Calendar, Proton Pass, and Proton Contacts, consolidating interaction with these five services into a single CLI tool rather than requiring users to rely on web interfaces or official graphical applications. Its stated purpose is to bring Proton's privacy-focused ecosystem to the command line while preserving the end-to-end encryption model that distinguishes Proton's offerings, meaning that sensitive data handled through the tool remains protected according to the same encryption principles associated with the underlying services. As a command-line utility, proton-cli falls within the developer tools and terminal productivity software category, and it is relevant to users who prefer scripted, keyboard-driven, or headless workflows for managing email, file storage, scheduling, passwords, and contact information. Typical use cases include checking and managing Proton Mail from a terminal environment, interacting with files stored in Proton Drive, consulting or updating calendar events, retrieving credentials from Proton Pass, and accessing contact records, all without leaving the command line. The breadth of its version history, spanning 31 published releases up to the current 3.8.0 release, indicates ongoing development and iterative refinement of the tool's capabilities across the supported Proton services. Because proton-cli is explicitly described as unofficial, it is developed and maintained independently rather than by Proton AG, and prospective users should understand it as a community-built client for Proton's services. Its focus on encryption, multi-service coverage, and terminal-native operation positions it as a specialized option for privacy-conscious users and command-line enthusiasts seeking unified access to Proton Mail, Drive, Calendar, Pass, and Contacts.

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