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InboxFamily vs Terasu

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

InboxFamily compared with Terasu
DetailInboxFamily logo InboxFamilyTerasu logo Terasu
What it doesCustom domain email for your family, handled by us in five minutes Every client project, in plain sight.
StageNot given MVP
FoundedNot given Not given
Based inPL JP
Pricing modelPaid Freemium
Pricing$19 per month for up to 6 mailboxes, plus domain cost paid once at signup ($15 for .com, more for other endings like .family, ranging from $8 to $43). Domain renewals included for as long as subscription is active. Free: $0/month (2 users, 3 rooms, 500MB storage). Solo: $35/month (1 seat, 10 rooms, 5GB storage). Starter: $69/month (3 users included, +$15 per additional user, 30 rooms, 10GB storage). Business: $199/month (10 users included, +$19 per additional user, unlimited rooms, 50GB storage). Enterprise: C
Key features
  • Up to 6 mailboxes per family
  • 5 GB storage per mailbox
  • Webmail at webmail.inboxfamily.com
  • Works with any IMAP and SMTP email app
  • SPF, DKIM and DMARC authentication
  • Spam filtering and DNS blocklists
  • Up to 10 aliases and catch-all address
  • Nightly encrypted backups
  • Auto-configuration for Apple Mail, Outlook, Thunderbird
  • No ads or email scanning
  • Rooms: shared spaces per project with files, conversations, notes, tasks, and decisions
  • File tracking: see which clients opened files and which pages they read
  • Decision timeline: trace agreements over time with original source records
  • Zoom integration: automatic transcript recording and saving to Rooms
  • AI agent with approval: drafts responses, reminders, and reports before human review
  • Task management: assign tasks with due dates to both team and client
  • Slack and LINE sync: messages sync between Room and external chat apps
  • Analytics: view logs, engagement reports, and AI-powered project health scoring
  • Stakeholder map: visualize project relationships with roles and influence
  • Permission controls: choose what clients see and what stays internal per page
What makes it different
  • Full domain ownership that stays with you even if you cancel
  • No email scanning or profiling for ads
  • Domain renewal cost covered for as long as subscription is active
  • Works with any standard email app or browser webmail
  • AI answers questions from Room records with citations to original sources
  • Clients join with one click from invitation email; no account creation required
  • Works alongside existing tools like Backlog and kintone without migration
  • File view tracking shows client engagement and helps spot stalled projects
  • All client-facing messages and reports require human approval before sending
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)3 +2 (up) since last check8 +1 (up) since last check
Trust Flow (Majestic)230
Citation Flow (Majestic)2817
Referring domains (Majestic)1117

6 details filled in for both companies.

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