Mail
Desktop · Lite · Max · Ultra X26
Lite free in Culltron OS

Culltron Mail

A local-first mail client for every account you have. Free Lite in the OS, professional workflows in Max, and Aria-powered drafting in Ultra X26.

✓ Gmail & Outlook ✓ IMAP / SMTP / POP3 ✓ Local-first inbox
Inbox — Culltron Mail
Inbox12
Drafts3
Sent
Archive
Accounts
Thandi M.09:42
Q4 launch timeline
Sharing the updated plan ahead of Monday…
Culltron Team08:30
Ultra X26 release notes
Here’s what shipped in this build…
Sipho N.Yesterday
Re: contract draft
Looks good — one small change on page 2…
InvoicesMon
Statement ready
Your monthly statement is attached…
Aria: "3 need replies — draft them?" Ultra
Bring your accounts

Connect any inbox in seconds.

Sign in with Google or Microsoft, or connect any provider with IMAP/SMTP. POP3 where you need it. Available from Mail Max.

Gmail
Google sign-in
Sign in with your Google account — OAuth, no password stored. Labels and threads sync natively.
OAuth
Outlook
Microsoft sign-in
Connect Microsoft 365 or Outlook.com with a Microsoft account. Calendar-aware.
OAuth
IMAP / SMTP
Any provider
Connect any standards-based mailbox — Fastmail, Zoho, your own server. Full send and receive.
Standards
POP3
Where you need it
Pull mail from legacy POP3 mailboxes into your local-first inbox when IMAP isn’t available.
Legacy
Three editions

Lite, Max, and Ultra X26.

Lite is free in Culltron OS. Max adds full account workflows. Ultra X26 brings Aria — summaries, replies and AI drafting.

Lite · in OS
Mail Lite
✓Free with Culltron OS
✓Local-first inbox & reading
✓Templates, drafts & signatures
✓Simple single-account setup
Max · paid
Mail Max
✓Everything in Lite
✓Gmail & Outlook sign-in
✓IMAP / SMTP / POP3
✓Unified multi-account inbox
✓Rules, filters & scheduling
Ultra X26 · flagship
Mail Ultra X26
✓Everything in Max
✓Aria thread summaries
✓AI drafting & smart replies
✓Provider / BYOK / Cloud AI
✓Inbox automations

Mail Lite is bundled with Culltron OS and is not sold separately. Aria features are Ultra X26 only.

Mail Ultra X26 · with Aria

Inbox intelligence, on your terms.

In Ultra X26, Aria summarises threads, drafts replies in your voice, and runs inbox automations — powered by a local model, your own provider, or Culltron Cloud through Bridge.

Meet Aria →
Thread summaries
Long threads condensed to the decisions and action items.
Drafts in your voice
Reply suggestions that match how you actually write.
Your model, your choice
Local, your own API key, or Culltron Cloud — via Bridge.
Inbox automations
Triage, label and route mail with Aria + Culltron Actions.
Get Culltron Mail

Every inbox, one local-first app.

Start with Mail Lite free in the OS. Buy Max for full account workflows, or unlock Ultra X26 for Aria-powered mail.

© 2026 Culltron. Engineered in South Africa. Local-first by design. BYO voice provider ready