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CLUSTER EMAIL-CLIENT-DESKTOP · 25 ENTRIES · EARLIEST ENTRY 2026-08-12

Desktop email client apps

This cluster comprises desktop and mobile email clients, many emphasizing offline functionality, multi-account aggregation, local-first storage, and integration with Exchange/Office 365 or legacy webmail wrappers. Dated entries before the index start show a sparse annual release from 2015 through 2025, then a denser series of seven entries in the first seven months of 2026. On traction, 'mail' leads decisively with 216 stars, far ahead of 'tinymails' (3 stars) and 'kingmail' (1 star).

Entry timeline

ENTRY TIMELINE

NOV 2014: 1MAR 2015: 1OCT 2019: 1JAN 2026: 1JUN 2026: 1JUL 2026: 1AUG 2026: 6SEP 2026: 9OCT 2026: 4
NOV 2014OCT 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 1 ai-built · 2 hand-coded · 17 unlabelled

Operator · 8 hobby · 4 indie · 2 commercial · 1 open source · 5 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 20 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01proton-mail-arm642★29 dayslivehobbyDesktop email client that provides Proton Mail on ARM64 Linux devices.
  2. 02mach2★2 days—hobbyNative email client for Gmail and Outlook that stores mail locally for instant search and navigation on Mac and iPhone.
  3. 03postbode1★3 daysliveDesktop email client that manages mailboxes with automatic filtering rules and supports local-first operation.
  4. 04Sterna Mail0★10 daysliveopen sourcePrivate email client for Android supporting JMAP and IMAP/SMTP with offline capabilities and no tracking.
  5. 05OTPcue1★1 day—hobbyDesktop app that automatically fills in email verification codes on Windows using locally processed email.
  6. 06mailbrief1★17 days—indieDesktop email assistant that provides weekly briefings, automations, receipt tracking, and phishing detection without cloud or AI.
  7. 07hudson2★1 molivehand-codedindieLocal‑first Gmail client for Mac that delivers AI and convenient without cloud, telemetry, or subscriptions, keeping email on the user's own device.
  8. 08NovaMail0★15 days—Desktop email client for Ubuntu that supports multiple IMAP accounts, unified inbox, full-text search and local AI assistance.
  9. 09penguin0★12 days—indieFast, private keyboard-first email client for Mac that stores the whole mailbox locally for on-device search, triage, and AI.
  10. 10origami0★15 days—Offline-first desktop email client for Arch Linux that stores mail locally and provides fast search.
  11. 11Zmail-Releases0★15 days—indieBilingual Windows email client for managing multiple IMAP accounts with advanced search, attachment management, and locally encrypted credentials.
  12. 12maelor1★2 mo—ai-builthobbyOffline-capable desktop email assistant that extracts traceable tasks from messages and auto-generates daily reports with source verification for privacy-conscious professionals.
  13. 13Email.cz0★1 moliveEmail client app for managing multiple mailboxes with search, offline mode, and dark/light theme support.
  14. 14nishro-room1★1 mo—hobbyDesktop hub that combines social and mail accounts, phone screen mirroring with remote input, LAN file transfer, and offline voice control into one password-protected window.
  15. 15kernel-inbox0★22 days—hobbyLocal read-only inbox app for browsing Linux kernel and security mailing lists with unread tracking and patch following.
  16. 16lotusmail0★1 mo—hand-codedOffline-first desktop email client combining folder management and smart inbox with multi-account support.
  17. 17threadbox0★28 dayslivehobbyDesktop app with browser extension that captures tasks from Slack, email, WhatsApp, screenshots, and voice notes into a local-first inbox.
  18. 18Fastmail – Email & Calendar0★1 molivecommercialFastmail is a private, fast email and calendar service with offline support, powerful search, and collaboration features for individuals and teams.
  19. 19outlook-electron0★1 mo—hobbyUnofficial desktop client for accessing Microsoft Outlook web mail on macOS.
  20. 20@UKR.NET Mail App0★3 molivecommercialOfficial email client for @UKR.NET accounts offering offline reading, large file forwarding, and push notifications.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.