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OTPClient review

Free#85 of 111 in Authenticator Apps

A capable open-source Linux authenticator for users who want local control and desktop integration.

3.0/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

OTPClient is an open-source Linux desktop authenticator for managing TOTP and HOTP tokens. Its GTK4/libadwaita interface supports configurable OTP digits, periods, and hashing algorithms, while token grouping and cross-database search help organize larger collections. The application also offers optional system-tray operation, start-at-login, auto-lock, and configurable clipboard wiping. It suits security-focused Linux desktop users who prefer local token management over a cloud-connected workflow.

The local security model is a central strength. OTPClient stores tokens in databases protected with AES-256-GCM and uses Argon2id for key derivation. Encrypted and plain backup import/export are available, and the application can work with OS Secret Service. QR codes can be scanned from images, a webcam, or the clipboard, reducing manual entry during setup. The command-line companion adds table, JSON, and CSV output, which fits users who want terminal access or script-friendly token views.

OTPClient also connects with the Linux desktop environment through GNOME Shell and KDE Plasma KRunner search integration. It supports importing backup formats associated with Aegis, Authenticator Pro, 2FAS, FreeOTP+, and Google Authenticator. Linux distribution is documented through Flatpak and distro repositories, while the product remains narrowly focused on desktop use. Users who need a local-first authenticator with strong storage controls, flexible QR import, and CLI access should consider it. Those who need synchronization across devices or team administration should choose a different authenticator.

OTPClient pros and cons

  • Where it wins
    • AES-256-GCM databases with Argon2id key derivation
    • QR scanning from images, webcam, or clipboard
    • CLI output plus GNOME Shell and KDE KRunner search integration
  • Where it doesn't
    • Linux desktop coverage only
    • No synchronization between devices
    • No team administration features

OTPClient fact sheet, pricing and score →

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