Whitespace.
See who already built your idea — and the space they left open.

CLUSTER CUSTOM-DOMAINS-EMAIL · 13 ENTRIES · EARLIEST ENTRY 2026-10-08

Self-hosted email suites

This cluster consists of self-hosted email and calendar applications for custom domains, offering mailboxes, shared calendars, and public booking pages. The dated history before the index start is too thin to read a shape from, with only two dated entries. Traction is led by mailriz with 27 stars, followed by Dmailflare-open-worker (2 stars) and tmx-scheduler-selfhost (1 star).

Entry timeline

ENTRY TIMELINE

NOV 2021: 1SEP 2026: 1OCT 2026: 11
NOV 2021OCT 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 · 13 unlabelled

Operator · 2 hobby · 4 indie · 1 commercial · 6 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 13 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01Dmailflare-open-worker2★26 dayslivehobbySelf-hosted email system for custom domains that provides full inbox management, sending, and team collaboration features without traditional servers.
  2. 02mailflare-tekkan0★4 days—Self-hosted email inbox for custom domains with mailboxes, calendar events, and public booking pages.
  3. 03Neo Email & AI Site Creator0★19 dayslivecommercialBusiness email service offering custom domains, AI writing assistance, appointment booking, and a website builder.
  4. 04omi-mail0★7 dayslivehobbyWeb app providing a personal workspace for managing custom-domain email, with a redesigned interface and integrated mail delivery.
  5. 05mailflare0★5 days—Web app that provides email and calendar for custom domains, with mailboxes, attachments, signatures, and booking pages.
  6. 06mailflare0★6 days—indieSelf-hosted web appthat provides email inboxes for custom domains, with send/receive mail, calendar scheduling,and public booking pages.
  7. 07mailflare0★6 days—indieSelf-hosted email client for custom domains that manages mailboxes, calendars, and public booking pages.
  8. 08mailflare0★6 days—Self-hosted email inbox for custom domains that provides mailboxes, shared calendars, and public booking pages.
  9. 09mailflare0★6 days—indieSelf-hosted email and calendar app for custom domains that manages mailboxes, sends and receives mail, schedules events, and offers public booking pages.
  10. 10mailflare0★7 days—Self-hosted email inbox for custom domains with shared mailboxes, calendar events, and public booking pages.
  11. 11mailflare0★7 days—indieSelf-hosted email client for custom domains that manages mailboxes, calendars, and public booking pages.
  12. 12mailflare0★6 days—Self-hosted email inbox for custom domains with shared mailboxes, calendar, and public booking pages.
  13. 13mailflare0★7 days—Self-hosted email inbox for custom domains that provides mailboxes, shared calendars, and public booking pages.

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.